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-rw-r--r--sys-kernel/linux-image-redcore/files/6.8-0001-linux6.8.y-bore5.1.0.patch764
-rw-r--r--sys-kernel/linux-image-redcore/files/6.8-amd64.config1
-rw-r--r--sys-kernel/linux-image-redcore/linux-image-redcore-6.8.7-r1.ebuild (renamed from sys-kernel/linux-image-redcore/linux-image-redcore-6.8.7.ebuild)3
-rw-r--r--sys-kernel/linux-sources-redcore/files/6.8-0001-linux6.8.y-bore5.1.0.patch764
-rw-r--r--sys-kernel/linux-sources-redcore/files/6.8-amd64.config1
-rw-r--r--sys-kernel/linux-sources-redcore/linux-sources-redcore-6.8.7-r1.ebuild (renamed from sys-kernel/linux-sources-redcore/linux-sources-redcore-6.8.7.ebuild)3
6 files changed, 1534 insertions, 2 deletions
diff --git a/sys-kernel/linux-image-redcore/files/6.8-0001-linux6.8.y-bore5.1.0.patch b/sys-kernel/linux-image-redcore/files/6.8-0001-linux6.8.y-bore5.1.0.patch
new file mode 100644
index 00000000..0fffdcea
--- /dev/null
+++ b/sys-kernel/linux-image-redcore/files/6.8-0001-linux6.8.y-bore5.1.0.patch
@@ -0,0 +1,764 @@
+From feae72fd7f2403910c157dd679d6ec240ed1dfbf Mon Sep 17 00:00:00 2001
+From: Masahito S <firelzrd@gmail.com>
+Date: Mon, 22 Apr 2024 04:12:58 +0900
+Subject: [PATCH] linux6.8.y-bore5.1.0
+
+---
+ include/linux/sched.h | 10 ++
+ init/Kconfig | 17 +++
+ kernel/sched/core.c | 143 +++++++++++++++++++++++++
+ kernel/sched/debug.c | 60 ++++++++++-
+ kernel/sched/fair.c | 230 ++++++++++++++++++++++++++++++++++++++--
+ kernel/sched/features.h | 4 +
+ kernel/sched/sched.h | 7 ++
+ 7 files changed, 462 insertions(+), 9 deletions(-)
+
+diff --git a/include/linux/sched.h b/include/linux/sched.h
+index ffe8f618ab..0ab0b04240 100644
+--- a/include/linux/sched.h
++++ b/include/linux/sched.h
+@@ -547,6 +547,16 @@ struct sched_entity {
+ u64 sum_exec_runtime;
+ u64 prev_sum_exec_runtime;
+ u64 vruntime;
++#ifdef CONFIG_SCHED_BORE
++ u64 burst_time;
++ u8 prev_burst_penalty;
++ u8 curr_burst_penalty;
++ u8 burst_penalty;
++ u8 burst_score;
++ u8 child_burst;
++ u32 child_burst_cnt;
++ u64 child_burst_last_cached;
++#endif // CONFIG_SCHED_BORE
+ s64 vlag;
+ u64 slice;
+
+diff --git a/init/Kconfig b/init/Kconfig
+index bee58f7468..13427dbb48 100644
+--- a/init/Kconfig
++++ b/init/Kconfig
+@@ -1279,6 +1279,23 @@ config CHECKPOINT_RESTORE
+
+ If unsure, say N here.
+
++config SCHED_BORE
++ bool "Burst-Oriented Response Enhancer"
++ default y
++ help
++ In Desktop and Mobile computing, one might prefer interactive
++ tasks to keep responsive no matter what they run in the background.
++
++ Enabling this kernel feature modifies the scheduler to discriminate
++ tasks by their burst time (runtime since it last went sleeping or
++ yielding state) and prioritize those that run less bursty.
++ Such tasks usually include window compositor, widgets backend,
++ terminal emulator, video playback, games and so on.
++ With a little impact to scheduling fairness, it may improve
++ responsiveness especially under heavy background workload.
++
++ If unsure, say Y here.
++
+ config SCHED_AUTOGROUP
+ bool "Automatic process group scheduling"
+ select CGROUPS
+diff --git a/kernel/sched/core.c b/kernel/sched/core.c
+index 9116bcc903..d1711f75f8 100644
+--- a/kernel/sched/core.c
++++ b/kernel/sched/core.c
+@@ -4507,6 +4507,138 @@ int wake_up_state(struct task_struct *p, unsigned int state)
+ return try_to_wake_up(p, state, 0);
+ }
+
++#ifdef CONFIG_SCHED_BORE
++extern u8 sched_burst_fork_atavistic;
++extern uint sched_burst_cache_lifetime;
++
++static void __init sched_init_bore(void) {
++ init_task.se.burst_time = 0;
++ init_task.se.prev_burst_penalty = 0;
++ init_task.se.curr_burst_penalty = 0;
++ init_task.se.burst_penalty = 0;
++ init_task.se.burst_score = 0;
++ init_task.se.child_burst_last_cached = 0;
++}
++
++void inline sched_fork_bore(struct task_struct *p) {
++ p->se.burst_time = 0;
++ p->se.curr_burst_penalty = 0;
++ p->se.burst_score = 0;
++ p->se.child_burst_last_cached = 0;
++}
++
++static u32 count_child_tasks(struct task_struct *p) {
++ struct task_struct *child;
++ u32 cnt = 0;
++ list_for_each_entry(child, &p->children, sibling) {cnt++;}
++ return cnt;
++}
++
++static inline bool task_is_inheritable(struct task_struct *p) {
++ return (p->sched_class == &fair_sched_class);
++}
++
++static inline bool child_burst_cache_expired(struct task_struct *p, u64 now) {
++ u64 expiration_time =
++ p->se.child_burst_last_cached + sched_burst_cache_lifetime;
++ return ((s64)(expiration_time - now) < 0);
++}
++
++static void __update_child_burst_cache(
++ struct task_struct *p, u32 cnt, u32 sum, u64 now) {
++ u8 avg = 0;
++ if (cnt) avg = sum / cnt;
++ p->se.child_burst = max(avg, p->se.burst_penalty);
++ p->se.child_burst_cnt = cnt;
++ p->se.child_burst_last_cached = now;
++}
++
++static inline void update_child_burst_direct(struct task_struct *p, u64 now) {
++ struct task_struct *child;
++ u32 cnt = 0;
++ u32 sum = 0;
++
++ list_for_each_entry(child, &p->children, sibling) {
++ if (!task_is_inheritable(child)) continue;
++ cnt++;
++ sum += child->se.burst_penalty;
++ }
++
++ __update_child_burst_cache(p, cnt, sum, now);
++}
++
++static inline u8 __inherit_burst_direct(struct task_struct *p, u64 now) {
++ struct task_struct *parent = p->real_parent;
++ if (child_burst_cache_expired(parent, now))
++ update_child_burst_direct(parent, now);
++
++ return parent->se.child_burst;
++}
++
++static void update_child_burst_topological(
++ struct task_struct *p, u64 now, u32 depth, u32 *acnt, u32 *asum) {
++ struct task_struct *child, *dec;
++ u32 cnt = 0, dcnt = 0;
++ u32 sum = 0;
++
++ list_for_each_entry(child, &p->children, sibling) {
++ dec = child;
++ while ((dcnt = count_child_tasks(dec)) == 1)
++ dec = list_first_entry(&dec->children, struct task_struct, sibling);
++
++ if (!dcnt || !depth) {
++ if (!task_is_inheritable(dec)) continue;
++ cnt++;
++ sum += dec->se.burst_penalty;
++ continue;
++ }
++ if (!child_burst_cache_expired(dec, now)) {
++ cnt += dec->se.child_burst_cnt;
++ sum += (u32)dec->se.child_burst * dec->se.child_burst_cnt;
++ continue;
++ }
++ update_child_burst_topological(dec, now, depth - 1, &cnt, &sum);
++ }
++
++ __update_child_burst_cache(p, cnt, sum, now);
++ *acnt += cnt;
++ *asum += sum;
++}
++
++static inline u8 __inherit_burst_topological(struct task_struct *p, u64 now) {
++ struct task_struct *anc = p->real_parent;
++ u32 cnt = 0, sum = 0;
++
++ while (anc->real_parent != anc && count_child_tasks(anc) == 1)
++ anc = anc->real_parent;
++
++ if (child_burst_cache_expired(anc, now))
++ update_child_burst_topological(
++ anc, now, sched_burst_fork_atavistic - 1, &cnt, &sum);
++
++ return anc->se.child_burst;
++}
++
++static inline void inherit_burst(struct task_struct *p) {
++ u8 burst_cache;
++ u64 now = ktime_get_ns();
++
++ read_lock(&tasklist_lock);
++ burst_cache = likely(sched_burst_fork_atavistic)?
++ __inherit_burst_topological(p, now):
++ __inherit_burst_direct(p, now);
++ read_unlock(&tasklist_lock);
++
++ p->se.prev_burst_penalty = max(p->se.prev_burst_penalty, burst_cache);
++}
++
++static void sched_post_fork_bore(struct task_struct *p) {
++ if (p->sched_class == &fair_sched_class)
++ inherit_burst(p);
++ p->se.burst_penalty = p->se.prev_burst_penalty;
++}
++#endif // CONFIG_SCHED_BORE
++
+ /*
+ * Perform scheduler related setup for a newly forked process p.
+ * p is forked by current.
+@@ -4523,6 +4655,9 @@ static void __sched_fork(unsigned long clone_flags, struct task_struct *p)
+ p->se.prev_sum_exec_runtime = 0;
+ p->se.nr_migrations = 0;
+ p->se.vruntime = 0;
++#ifdef CONFIG_SCHED_BORE
++ sched_fork_bore(p);
++#endif // CONFIG_SCHED_BORE
+ p->se.vlag = 0;
+ p->se.slice = sysctl_sched_base_slice;
+ INIT_LIST_HEAD(&p->se.group_node);
+@@ -4839,6 +4974,9 @@ void sched_cgroup_fork(struct task_struct *p, struct kernel_clone_args *kargs)
+
+ void sched_post_fork(struct task_struct *p)
+ {
++#ifdef CONFIG_SCHED_BORE
++ sched_post_fork_bore(p);
++#endif // CONFIG_SCHED_BORE
+ uclamp_post_fork(p);
+ }
+
+@@ -9910,6 +10048,11 @@ void __init sched_init(void)
+ BUG_ON(&dl_sched_class != &stop_sched_class + 1);
+ #endif
+
++#ifdef CONFIG_SCHED_BORE
++ sched_init_bore();
++ printk(KERN_INFO "BORE (Burst-Oriented Response Enhancer) CPU Scheduler modification 5.1.0 by Masahito Suzuki");
++#endif // CONFIG_SCHED_BORE
++
+ wait_bit_init();
+
+ #ifdef CONFIG_FAIR_GROUP_SCHED
+diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
+index 8d5d98a583..b178612617 100644
+--- a/kernel/sched/debug.c
++++ b/kernel/sched/debug.c
+@@ -167,7 +167,52 @@ static const struct file_operations sched_feat_fops = {
+ };
+
+ #ifdef CONFIG_SMP
++#ifdef CONFIG_SCHED_BORE
++static ssize_t sched_min_base_slice_write(struct file *filp, const char __user *ubuf,
++ size_t cnt, loff_t *ppos)
++{
++ char buf[16];
++ unsigned int value;
++
++ if (cnt > 15)
++ cnt = 15;
++
++ if (copy_from_user(&buf, ubuf, cnt))
++ return -EFAULT;
++ buf[cnt] = '\0';
++
++ if (kstrtouint(buf, 10, &value))
++ return -EINVAL;
+
++ if (!value)
++ return -EINVAL;
++
++ sysctl_sched_min_base_slice = value;
++ sched_update_min_base_slice();
++
++ *ppos += cnt;
++ return cnt;
++}
++
++static int sched_min_base_slice_show(struct seq_file *m, void *v)
++{
++ seq_printf(m, "%d\n", sysctl_sched_min_base_slice);
++ return 0;
++}
++
++static int sched_min_base_slice_open(struct inode *inode, struct file *filp)
++{
++ return single_open(filp, sched_min_base_slice_show, NULL);
++}
++
++static const struct file_operations sched_min_base_slice_fops = {
++ .open = sched_min_base_slice_open,
++ .write = sched_min_base_slice_write,
++ .read = seq_read,
++ .llseek = seq_lseek,
++ .release = single_release,
++};
++#else // !CONFIG_SCHED_BORE
+ static ssize_t sched_scaling_write(struct file *filp, const char __user *ubuf,
+ size_t cnt, loff_t *ppos)
+ {
+@@ -213,7 +258,7 @@ static const struct file_operations sched_scaling_fops = {
+ .llseek = seq_lseek,
+ .release = single_release,
+ };
+-
++#endif // CONFIG_SCHED_BORE
+ #endif /* SMP */
+
+ #ifdef CONFIG_PREEMPT_DYNAMIC
+@@ -347,13 +392,20 @@ static __init int sched_init_debug(void)
+ debugfs_create_file("preempt", 0644, debugfs_sched, NULL, &sched_dynamic_fops);
+ #endif
+
++#ifdef CONFIG_SCHED_BORE
++ debugfs_create_file("min_base_slice_ns", 0644, debugfs_sched, NULL, &sched_min_base_slice_fops);
++ debugfs_create_u32("base_slice_ns", 0400, debugfs_sched, &sysctl_sched_base_slice);
++#else // !CONFIG_SCHED_BORE
+ debugfs_create_u32("base_slice_ns", 0644, debugfs_sched, &sysctl_sched_base_slice);
++#endif // CONFIG_SCHED_BORE
+
+ debugfs_create_u32("latency_warn_ms", 0644, debugfs_sched, &sysctl_resched_latency_warn_ms);
+ debugfs_create_u32("latency_warn_once", 0644, debugfs_sched, &sysctl_resched_latency_warn_once);
+
+ #ifdef CONFIG_SMP
++#if !defined(CONFIG_SCHED_BORE)
+ debugfs_create_file("tunable_scaling", 0644, debugfs_sched, NULL, &sched_scaling_fops);
++#endif // CONFIG_SCHED_BORE
+ debugfs_create_u32("migration_cost_ns", 0644, debugfs_sched, &sysctl_sched_migration_cost);
+ debugfs_create_u32("nr_migrate", 0644, debugfs_sched, &sysctl_sched_nr_migrate);
+
+@@ -595,6 +647,9 @@ print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
+ SPLIT_NS(schedstat_val_or_zero(p->stats.sum_sleep_runtime)),
+ SPLIT_NS(schedstat_val_or_zero(p->stats.sum_block_runtime)));
+
++#ifdef CONFIG_SCHED_BORE
++ SEQ_printf(m, " %2d", p->se.burst_score);
++#endif // CONFIG_SCHED_BORE
+ #ifdef CONFIG_NUMA_BALANCING
+ SEQ_printf(m, " %d %d", task_node(p), task_numa_group_id(p));
+ #endif
+@@ -1068,6 +1123,9 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
+
+ P(se.load.weight);
+ #ifdef CONFIG_SMP
++#ifdef CONFIG_SCHED_BORE
++ P(se.burst_score);
++#endif // CONFIG_SCHED_BORE
+ P(se.avg.load_sum);
+ P(se.avg.runnable_sum);
+ P(se.avg.util_sum);
+diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
+index 533547e3c9..a2346b1b44 100644
+--- a/kernel/sched/fair.c
++++ b/kernel/sched/fair.c
+@@ -19,6 +19,9 @@
+ *
+ * Adaptive scheduling granularity, math enhancements by Peter Zijlstra
+ * Copyright (C) 2007 Red Hat, Inc., Peter Zijlstra
++ *
++ * Burst-Oriented Response Enhancer (BORE) CPU Scheduler
++ * Copyright (C) 2021-2024 Masahito Suzuki <firelzrd@gmail.com>
+ */
+ #include <linux/energy_model.h>
+ #include <linux/mmap_lock.h>
+@@ -64,20 +67,125 @@
+ * SCHED_TUNABLESCALING_LOG - scaled logarithmical, *1+ilog(ncpus)
+ * SCHED_TUNABLESCALING_LINEAR - scaled linear, *ncpus
+ *
+- * (default SCHED_TUNABLESCALING_LOG = *(1+ilog(ncpus))
++ * (BORE default SCHED_TUNABLESCALING_NONE = *1 constant)
++ * (EEVDF default SCHED_TUNABLESCALING_LOG = *(1+ilog(ncpus))
+ */
++#ifdef CONFIG_SCHED_BORE
++unsigned int sysctl_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE;
++#else // !CONFIG_SCHED_BORE
+ unsigned int sysctl_sched_tunable_scaling = SCHED_TUNABLESCALING_LOG;
++#endif // CONFIG_SCHED_BORE
+
+ /*
+ * Minimal preemption granularity for CPU-bound tasks:
+ *
+- * (default: 0.75 msec * (1 + ilog(ncpus)), units: nanoseconds)
++ * (BORE default: max(1 sec / HZ, min_base_slice) constant, units: nanoseconds)
++ * (EEVDF default: 0.75 msec * (1 + ilog(ncpus)), units: nanoseconds)
+ */
++#ifdef CONFIG_SCHED_BORE
++unsigned int sysctl_sched_base_slice = 1000000000ULL / HZ;
++static unsigned int configured_sched_base_slice = 1000000000ULL / HZ;
++unsigned int sysctl_sched_min_base_slice = 2000000ULL;
++#else // !CONFIG_SCHED_BORE
+ unsigned int sysctl_sched_base_slice = 750000ULL;
+ static unsigned int normalized_sysctl_sched_base_slice = 750000ULL;
++#endif // CONFIG_SCHED_BORE
+
+ const_debug unsigned int sysctl_sched_migration_cost = 500000UL;
+
++#ifdef CONFIG_SCHED_BORE
++u8 __read_mostly sched_bore = 1;
++u8 __read_mostly sched_burst_smoothness_long = 1;
++u8 __read_mostly sched_burst_smoothness_short = 0;
++u8 __read_mostly sched_burst_fork_atavistic = 2;
++u8 __read_mostly sched_burst_penalty_offset = 22;
++uint __read_mostly sched_burst_penalty_scale = 1280;
++uint __read_mostly sched_burst_cache_lifetime = 60000000;
++static int __maybe_unused sixty_four = 64;
++static int __maybe_unused maxval_12_bits = 4095;
++
++#define MAX_BURST_PENALTY (39U <<2)
++
++static inline u32 log2plus1_u64_u32f8(u64 v) {
++ u32 msb = fls64(v);
++ s32 excess_bits = msb - 9;
++ u8 fractional = (0 <= excess_bits)? v >> excess_bits: v << -excess_bits;
++ return msb << 8 | fractional;
++}
++
++static inline u32 calc_burst_penalty(u64 burst_time) {
++ u32 greed, tolerance, penalty, scaled_penalty;
++
++ greed = log2plus1_u64_u32f8(burst_time);
++ tolerance = sched_burst_penalty_offset << 8;
++ penalty = max(0, (s32)greed - (s32)tolerance);
++ scaled_penalty = penalty * sched_burst_penalty_scale >> 16;
++
++ return min(MAX_BURST_PENALTY, scaled_penalty);
++}
++
++static inline u64 scale_slice(u64 delta, struct sched_entity *se) {
++ return mul_u64_u32_shr(delta, sched_prio_to_wmult[se->burst_score], 22);
++}
++
++static inline u64 __unscale_slice(u64 delta, u8 score) {
++ return mul_u64_u32_shr(delta, sched_prio_to_weight[score], 10);
++}
++
++static inline u64 unscale_slice(u64 delta, struct sched_entity *se) {
++ return __unscale_slice(delta, se->burst_score);
++}
++
++void reweight_task(struct task_struct *p, int prio);
++
++static void update_burst_score(struct sched_entity *se) {
++ if (!entity_is_task(se)) return;
++ struct task_struct *p = task_of(se);
++ u8 prio = p->static_prio - MAX_RT_PRIO;
++ u8 prev_prio = min(39, prio + se->burst_score);
++
++ se->burst_score = se->burst_penalty >> 2;
++
++ u8 new_prio = min(39, prio + se->burst_score);
++ if (new_prio != prev_prio)
++ reweight_task(p, new_prio);
++}
++
++static void update_burst_penalty(struct sched_entity *se) {
++ se->curr_burst_penalty = calc_burst_penalty(se->burst_time);
++ se->burst_penalty = max(se->prev_burst_penalty, se->curr_burst_penalty);
++ update_burst_score(se);
++}
++
++static inline u32 binary_smooth(u32 new, u32 old) {
++ int increment = new - old;
++ return (0 <= increment)?
++ old + ( increment >> (int)sched_burst_smoothness_long):
++ old - (-increment >> (int)sched_burst_smoothness_short);
++}
++
++static void restart_burst(struct sched_entity *se) {
++ se->burst_penalty = se->prev_burst_penalty =
++ binary_smooth(se->curr_burst_penalty, se->prev_burst_penalty);
++ se->curr_burst_penalty = 0;
++ se->burst_time = 0;
++ update_burst_score(se);
++}
++
++static void restart_burst_rescale_deadline(struct sched_entity *se) {
++ s64 vscaled, wremain, vremain = se->deadline - se->vruntime;
++ u8 prev_score = se->burst_score;
++ restart_burst(se);
++ if (prev_score > se->burst_score) {
++ wremain = __unscale_slice(abs(vremain), prev_score);
++ vscaled = scale_slice(wremain, se);
++ if (unlikely(vremain < 0))
++ vscaled = -vscaled;
++ se->deadline = se->vruntime + vscaled;
++ }
++}
++#endif // CONFIG_SCHED_BORE
++
+ int sched_thermal_decay_shift;
+ static int __init setup_sched_thermal_decay_shift(char *str)
+ {
+@@ -137,6 +245,69 @@ static unsigned int sysctl_numa_balancing_promote_rate_limit = 65536;
+
+ #ifdef CONFIG_SYSCTL
+ static struct ctl_table sched_fair_sysctls[] = {
++#ifdef CONFIG_SCHED_BORE
++ {
++ .procname = "sched_bore",
++ .data = &sched_bore,
++ .maxlen = sizeof(u8),
++ .mode = 0644,
++ .proc_handler = proc_dou8vec_minmax,
++ .extra1 = SYSCTL_ONE,
++ .extra2 = SYSCTL_ONE,
++ },
++ {
++ .procname = "sched_burst_smoothness_long",
++ .data = &sched_burst_smoothness_long,
++ .maxlen = sizeof(u8),
++ .mode = 0644,
++ .proc_handler = proc_dou8vec_minmax,
++ .extra1 = SYSCTL_ZERO,
++ .extra2 = SYSCTL_ONE,
++ },
++ {
++ .procname = "sched_burst_smoothness_short",
++ .data = &sched_burst_smoothness_short,
++ .maxlen = sizeof(u8),
++ .mode = 0644,
++ .proc_handler = proc_dou8vec_minmax,
++ .extra1 = SYSCTL_ZERO,
++ .extra2 = SYSCTL_ONE,
++ },
++ {
++ .procname = "sched_burst_fork_atavistic",
++ .data = &sched_burst_fork_atavistic,
++ .maxlen = sizeof(u8),
++ .mode = 0644,
++ .proc_handler = proc_dou8vec_minmax,
++ .extra1 = SYSCTL_ZERO,
++ .extra2 = SYSCTL_THREE,
++ },
++ {
++ .procname = "sched_burst_penalty_offset",
++ .data = &sched_burst_penalty_offset,
++ .maxlen = sizeof(u8),
++ .mode = 0644,
++ .proc_handler = proc_dou8vec_minmax,
++ .extra1 = SYSCTL_ZERO,
++ .extra2 = &sixty_four,
++ },
++ {
++ .procname = "sched_burst_penalty_scale",
++ .data = &sched_burst_penalty_scale,
++ .maxlen = sizeof(uint),
++ .mode = 0644,
++ .proc_handler = proc_douintvec_minmax,
++ .extra1 = SYSCTL_ZERO,
++ .extra2 = &maxval_12_bits,
++ },
++ {
++ .procname = "sched_burst_cache_lifetime",
++ .data = &sched_burst_cache_lifetime,
++ .maxlen = sizeof(uint),
++ .mode = 0644,
++ .proc_handler = proc_douintvec,
++ },
++#endif // CONFIG_SCHED_BORE
+ #ifdef CONFIG_CFS_BANDWIDTH
+ {
+ .procname = "sched_cfs_bandwidth_slice_us",
+@@ -195,6 +366,13 @@ static inline void update_load_set(struct load_weight *lw, unsigned long w)
+ *
+ * This idea comes from the SD scheduler of Con Kolivas:
+ */
++#ifdef CONFIG_SCHED_BORE
++static void update_sysctl(void) {
++ sysctl_sched_base_slice =
++ max(sysctl_sched_min_base_slice, configured_sched_base_slice);
++}
++void sched_update_min_base_slice(void) { update_sysctl(); }
++#else // !CONFIG_SCHED_BORE
+ static unsigned int get_update_sysctl_factor(void)
+ {
+ unsigned int cpus = min_t(unsigned int, num_online_cpus(), 8);
+@@ -225,6 +403,7 @@ static void update_sysctl(void)
+ SET_SYSCTL(sched_base_slice);
+ #undef SET_SYSCTL
+ }
++#endif // CONFIG_SCHED_BORE
+
+ void __init sched_init_granularity(void)
+ {
+@@ -704,6 +883,9 @@ static void update_entity_lag(struct cfs_rq *cfs_rq, struct sched_entity *se)
+ lag = avg_vruntime(cfs_rq) - se->vruntime;
+
+ limit = calc_delta_fair(max_t(u64, 2*se->slice, TICK_NSEC), se);
++#ifdef CONFIG_SCHED_BORE
++ limit >>= 1;
++#endif // CONFIG_SCHED_BORE
+ se->vlag = clamp(lag, -limit, limit);
+ }
+
+@@ -955,6 +1137,7 @@ struct sched_entity *__pick_last_entity(struct cfs_rq *cfs_rq)
+ * Scheduling class statistics methods:
+ */
+ #ifdef CONFIG_SMP
++#if !defined(CONFIG_SCHED_BORE)
+ int sched_update_scaling(void)
+ {
+ unsigned int factor = get_update_sysctl_factor();
+@@ -966,6 +1149,7 @@ int sched_update_scaling(void)
+
+ return 0;
+ }
++#endif // CONFIG_SCHED_BORE
+ #endif
+ #endif
+
+@@ -1165,7 +1349,13 @@ static void update_curr(struct cfs_rq *cfs_rq)
+ if (unlikely(delta_exec <= 0))
+ return;
+
++#ifdef CONFIG_SCHED_BORE
++ curr->burst_time += delta_exec;
++ update_burst_penalty(curr);
++ curr->vruntime += max(1ULL, calc_delta_fair(delta_exec, curr));
++#else // !CONFIG_SCHED_BORE
+ curr->vruntime += calc_delta_fair(delta_exec, curr);
++#endif // CONFIG_SCHED_BORE
+ update_deadline(cfs_rq, curr);
+ update_min_vruntime(cfs_rq);
+
+@@ -3671,10 +3861,9 @@ dequeue_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *se) { }
+ #endif
+
+ static void reweight_eevdf(struct cfs_rq *cfs_rq, struct sched_entity *se,
+- unsigned long weight)
++ unsigned long weight, u64 avruntime)
+ {
+ unsigned long old_weight = se->load.weight;
+- u64 avruntime = avg_vruntime(cfs_rq);
+ s64 vlag, vslice;
+
+ /*
+@@ -3782,11 +3971,13 @@ static void reweight_entity(struct cfs_rq *cfs_rq, struct sched_entity *se,
+ {
+ bool curr = cfs_rq->curr == se;
+
++ if (curr)
++ update_curr(cfs_rq);
++ u64 avruntime = avg_vruntime(cfs_rq);
++
+ if (se->on_rq) {
+ /* commit outstanding execution time */
+- if (curr)
+- update_curr(cfs_rq);
+- else
++ if (!curr)
+ __dequeue_entity(cfs_rq, se);
+ update_load_sub(&cfs_rq->load, se->load.weight);
+ }
+@@ -3799,7 +3990,7 @@ static void reweight_entity(struct cfs_rq *cfs_rq, struct sched_entity *se,
+ */
+ se->vlag = div_s64(se->vlag * se->load.weight, weight);
+ } else {
+- reweight_eevdf(cfs_rq, se, weight);
++ reweight_eevdf(cfs_rq, se, weight, avruntime);
+ }
+
+ update_load_set(&se->load, weight);
+@@ -5171,6 +5362,9 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int flags)
+ *
+ * EEVDF: placement strategy #1 / #2
+ */
++#ifdef CONFIG_SCHED_BORE
++ if (se->vlag)
++#endif // CONFIG_SCHED_BORE
+ if (sched_feat(PLACE_LAG) && cfs_rq->nr_running) {
+ struct sched_entity *curr = cfs_rq->curr;
+ unsigned long load;
+@@ -6803,6 +6997,14 @@ static void dequeue_task_fair(struct rq *rq, struct task_struct *p, int flags)
+ bool was_sched_idle = sched_idle_rq(rq);
+
+ util_est_dequeue(&rq->cfs, p);
++#ifdef CONFIG_SCHED_BORE
++ if (task_sleep) {
++ cfs_rq = cfs_rq_of(se);
++ if (cfs_rq->curr == se)
++ update_curr(cfs_rq);
++ restart_burst(se);
++ }
++#endif // CONFIG_SCHED_BORE
+
+ for_each_sched_entity(se) {
+ cfs_rq = cfs_rq_of(se);
+@@ -8552,16 +8754,25 @@ static void yield_task_fair(struct rq *rq)
+ /*
+ * Are we the only task in the tree?
+ */
++#if !defined(CONFIG_SCHED_BORE)
+ if (unlikely(rq->nr_running == 1))
+ return;
+
+ clear_buddies(cfs_rq, se);
++#endif // CONFIG_SCHED_BORE
+
+ update_rq_clock(rq);
+ /*
+ * Update run-time statistics of the 'current'.
+ */
+ update_curr(cfs_rq);
++#ifdef CONFIG_SCHED_BORE
++ restart_burst_rescale_deadline(se);
++ if (unlikely(rq->nr_running == 1))
++ return;
++
++ clear_buddies(cfs_rq, se);
++#endif // CONFIG_SCHED_BORE
+ /*
+ * Tell update_rq_clock() that we've just updated,
+ * so we don't do microscopic update in schedule()
+@@ -12651,6 +12862,9 @@ static void task_fork_fair(struct task_struct *p)
+ curr = cfs_rq->curr;
+ if (curr)
+ update_curr(cfs_rq);
++#ifdef CONFIG_SCHED_BORE
++ update_burst_score(se);
++#endif // CONFIG_SCHED_BORE
+ place_entity(cfs_rq, se, ENQUEUE_INITIAL);
+ rq_unlock(rq, &rf);
+ }
+diff --git a/kernel/sched/features.h b/kernel/sched/features.h
+index 143f55df89..3f0fe409f5 100644
+--- a/kernel/sched/features.h
++++ b/kernel/sched/features.h
+@@ -6,7 +6,11 @@
+ */
+ SCHED_FEAT(PLACE_LAG, true)
+ SCHED_FEAT(PLACE_DEADLINE_INITIAL, true)
++#ifdef CONFIG_SCHED_BORE
++SCHED_FEAT(RUN_TO_PARITY, false)
++#else // !CONFIG_SCHED_BORE
+ SCHED_FEAT(RUN_TO_PARITY, true)
++#endif // CONFIG_SCHED_BORE
+
+ /*
+ * Prefer to schedule the task we woke last (assuming it failed
+diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
+index 001fe047bd..da3ad1d4e1 100644
+--- a/kernel/sched/sched.h
++++ b/kernel/sched/sched.h
+@@ -1965,7 +1965,11 @@ static inline void dirty_sched_domain_sysctl(int cpu)
+ }
+ #endif
+
++#ifdef CONFIG_SCHED_BORE
++extern void sched_update_min_base_slice(void);
++#else // !CONFIG_SCHED_BORE
+ extern int sched_update_scaling(void);
++#endif // CONFIG_SCHED_BORE
+
+ static inline const struct cpumask *task_user_cpus(struct task_struct *p)
+ {
+@@ -2552,6 +2556,9 @@ extern const_debug unsigned int sysctl_sched_nr_migrate;
+ extern const_debug unsigned int sysctl_sched_migration_cost;
+
+ extern unsigned int sysctl_sched_base_slice;
++#ifdef CONFIG_SCHED_BORE
++extern unsigned int sysctl_sched_min_base_slice;
++#endif // CONFIG_SCHED_BORE
+
+ #ifdef CONFIG_SCHED_DEBUG
+ extern int sysctl_resched_latency_warn_ms;
+--
+2.34.1
+
diff --git a/sys-kernel/linux-image-redcore/files/6.8-amd64.config b/sys-kernel/linux-image-redcore/files/6.8-amd64.config
index 4efc3471..7fa428ce 100644
--- a/sys-kernel/linux-image-redcore/files/6.8-amd64.config
+++ b/sys-kernel/linux-image-redcore/files/6.8-amd64.config
@@ -233,6 +233,7 @@ CONFIG_USER_NS_UNPRIVILEGED=y
CONFIG_PID_NS=y
CONFIG_NET_NS=y
CONFIG_CHECKPOINT_RESTORE=y
+CONFIG_SCHED_BORE=y
CONFIG_SCHED_AUTOGROUP=y
CONFIG_RELAY=y
CONFIG_BLK_DEV_INITRD=y
diff --git a/sys-kernel/linux-image-redcore/linux-image-redcore-6.8.7.ebuild b/sys-kernel/linux-image-redcore/linux-image-redcore-6.8.7-r1.ebuild
index de25118a..4f06ed08 100644
--- a/sys-kernel/linux-image-redcore/linux-image-redcore-6.8.7.ebuild
+++ b/sys-kernel/linux-image-redcore/linux-image-redcore-6.8.7-r1.ebuild
@@ -5,7 +5,7 @@ EAPI=6
inherit eutils
-EXTRAVERSION="redcore"
+EXTRAVERSION="redcore-r1"
KV_FULL="${PV}-${EXTRAVERSION}"
KV_MAJOR="6.8"
@@ -34,6 +34,7 @@ DEPEND="
RDEPEND="${DEPEND}"
PATCHES=(
+ "${FILESDIR}"/"${KV_MAJOR}"-0001-linux6.8.y-bore5.1.0.patch
"${FILESDIR}"/"${KV_MAJOR}"-ath10k-be-quiet.patch
"${FILESDIR}"/"${KV_MAJOR}"-ata-fix-NCQ-LOG-strings-and-move-to-debug.patch
"${FILESDIR}"/"${KV_MAJOR}"-acpi-use-kern_warning_even_when_error.patch
diff --git a/sys-kernel/linux-sources-redcore/files/6.8-0001-linux6.8.y-bore5.1.0.patch b/sys-kernel/linux-sources-redcore/files/6.8-0001-linux6.8.y-bore5.1.0.patch
new file mode 100644
index 00000000..0fffdcea
--- /dev/null
+++ b/sys-kernel/linux-sources-redcore/files/6.8-0001-linux6.8.y-bore5.1.0.patch
@@ -0,0 +1,764 @@
+From feae72fd7f2403910c157dd679d6ec240ed1dfbf Mon Sep 17 00:00:00 2001
+From: Masahito S <firelzrd@gmail.com>
+Date: Mon, 22 Apr 2024 04:12:58 +0900
+Subject: [PATCH] linux6.8.y-bore5.1.0
+
+---
+ include/linux/sched.h | 10 ++
+ init/Kconfig | 17 +++
+ kernel/sched/core.c | 143 +++++++++++++++++++++++++
+ kernel/sched/debug.c | 60 ++++++++++-
+ kernel/sched/fair.c | 230 ++++++++++++++++++++++++++++++++++++++--
+ kernel/sched/features.h | 4 +
+ kernel/sched/sched.h | 7 ++
+ 7 files changed, 462 insertions(+), 9 deletions(-)
+
+diff --git a/include/linux/sched.h b/include/linux/sched.h
+index ffe8f618ab..0ab0b04240 100644
+--- a/include/linux/sched.h
++++ b/include/linux/sched.h
+@@ -547,6 +547,16 @@ struct sched_entity {
+ u64 sum_exec_runtime;
+ u64 prev_sum_exec_runtime;
+ u64 vruntime;
++#ifdef CONFIG_SCHED_BORE
++ u64 burst_time;
++ u8 prev_burst_penalty;
++ u8 curr_burst_penalty;
++ u8 burst_penalty;
++ u8 burst_score;
++ u8 child_burst;
++ u32 child_burst_cnt;
++ u64 child_burst_last_cached;
++#endif // CONFIG_SCHED_BORE
+ s64 vlag;
+ u64 slice;
+
+diff --git a/init/Kconfig b/init/Kconfig
+index bee58f7468..13427dbb48 100644
+--- a/init/Kconfig
++++ b/init/Kconfig
+@@ -1279,6 +1279,23 @@ config CHECKPOINT_RESTORE
+
+ If unsure, say N here.
+
++config SCHED_BORE
++ bool "Burst-Oriented Response Enhancer"
++ default y
++ help
++ In Desktop and Mobile computing, one might prefer interactive
++ tasks to keep responsive no matter what they run in the background.
++
++ Enabling this kernel feature modifies the scheduler to discriminate
++ tasks by their burst time (runtime since it last went sleeping or
++ yielding state) and prioritize those that run less bursty.
++ Such tasks usually include window compositor, widgets backend,
++ terminal emulator, video playback, games and so on.
++ With a little impact to scheduling fairness, it may improve
++ responsiveness especially under heavy background workload.
++
++ If unsure, say Y here.
++
+ config SCHED_AUTOGROUP
+ bool "Automatic process group scheduling"
+ select CGROUPS
+diff --git a/kernel/sched/core.c b/kernel/sched/core.c
+index 9116bcc903..d1711f75f8 100644
+--- a/kernel/sched/core.c
++++ b/kernel/sched/core.c
+@@ -4507,6 +4507,138 @@ int wake_up_state(struct task_struct *p, unsigned int state)
+ return try_to_wake_up(p, state, 0);
+ }
+
++#ifdef CONFIG_SCHED_BORE
++extern u8 sched_burst_fork_atavistic;
++extern uint sched_burst_cache_lifetime;
++
++static void __init sched_init_bore(void) {
++ init_task.se.burst_time = 0;
++ init_task.se.prev_burst_penalty = 0;
++ init_task.se.curr_burst_penalty = 0;
++ init_task.se.burst_penalty = 0;
++ init_task.se.burst_score = 0;
++ init_task.se.child_burst_last_cached = 0;
++}
++
++void inline sched_fork_bore(struct task_struct *p) {
++ p->se.burst_time = 0;
++ p->se.curr_burst_penalty = 0;
++ p->se.burst_score = 0;
++ p->se.child_burst_last_cached = 0;
++}
++
++static u32 count_child_tasks(struct task_struct *p) {
++ struct task_struct *child;
++ u32 cnt = 0;
++ list_for_each_entry(child, &p->children, sibling) {cnt++;}
++ return cnt;
++}
++
++static inline bool task_is_inheritable(struct task_struct *p) {
++ return (p->sched_class == &fair_sched_class);
++}
++
++static inline bool child_burst_cache_expired(struct task_struct *p, u64 now) {
++ u64 expiration_time =
++ p->se.child_burst_last_cached + sched_burst_cache_lifetime;
++ return ((s64)(expiration_time - now) < 0);
++}
++
++static void __update_child_burst_cache(
++ struct task_struct *p, u32 cnt, u32 sum, u64 now) {
++ u8 avg = 0;
++ if (cnt) avg = sum / cnt;
++ p->se.child_burst = max(avg, p->se.burst_penalty);
++ p->se.child_burst_cnt = cnt;
++ p->se.child_burst_last_cached = now;
++}
++
++static inline void update_child_burst_direct(struct task_struct *p, u64 now) {
++ struct task_struct *child;
++ u32 cnt = 0;
++ u32 sum = 0;
++
++ list_for_each_entry(child, &p->children, sibling) {
++ if (!task_is_inheritable(child)) continue;
++ cnt++;
++ sum += child->se.burst_penalty;
++ }
++
++ __update_child_burst_cache(p, cnt, sum, now);
++}
++
++static inline u8 __inherit_burst_direct(struct task_struct *p, u64 now) {
++ struct task_struct *parent = p->real_parent;
++ if (child_burst_cache_expired(parent, now))
++ update_child_burst_direct(parent, now);
++
++ return parent->se.child_burst;
++}
++
++static void update_child_burst_topological(
++ struct task_struct *p, u64 now, u32 depth, u32 *acnt, u32 *asum) {
++ struct task_struct *child, *dec;
++ u32 cnt = 0, dcnt = 0;
++ u32 sum = 0;
++
++ list_for_each_entry(child, &p->children, sibling) {
++ dec = child;
++ while ((dcnt = count_child_tasks(dec)) == 1)
++ dec = list_first_entry(&dec->children, struct task_struct, sibling);
++
++ if (!dcnt || !depth) {
++ if (!task_is_inheritable(dec)) continue;
++ cnt++;
++ sum += dec->se.burst_penalty;
++ continue;
++ }
++ if (!child_burst_cache_expired(dec, now)) {
++ cnt += dec->se.child_burst_cnt;
++ sum += (u32)dec->se.child_burst * dec->se.child_burst_cnt;
++ continue;
++ }
++ update_child_burst_topological(dec, now, depth - 1, &cnt, &sum);
++ }
++
++ __update_child_burst_cache(p, cnt, sum, now);
++ *acnt += cnt;
++ *asum += sum;
++}
++
++static inline u8 __inherit_burst_topological(struct task_struct *p, u64 now) {
++ struct task_struct *anc = p->real_parent;
++ u32 cnt = 0, sum = 0;
++
++ while (anc->real_parent != anc && count_child_tasks(anc) == 1)
++ anc = anc->real_parent;
++
++ if (child_burst_cache_expired(anc, now))
++ update_child_burst_topological(
++ anc, now, sched_burst_fork_atavistic - 1, &cnt, &sum);
++
++ return anc->se.child_burst;
++}
++
++static inline void inherit_burst(struct task_struct *p) {
++ u8 burst_cache;
++ u64 now = ktime_get_ns();
++
++ read_lock(&tasklist_lock);
++ burst_cache = likely(sched_burst_fork_atavistic)?
++ __inherit_burst_topological(p, now):
++ __inherit_burst_direct(p, now);
++ read_unlock(&tasklist_lock);
++
++ p->se.prev_burst_penalty = max(p->se.prev_burst_penalty, burst_cache);
++}
++
++static void sched_post_fork_bore(struct task_struct *p) {
++ if (p->sched_class == &fair_sched_class)
++ inherit_burst(p);
++ p->se.burst_penalty = p->se.prev_burst_penalty;
++}
++#endif // CONFIG_SCHED_BORE
++
+ /*
+ * Perform scheduler related setup for a newly forked process p.
+ * p is forked by current.
+@@ -4523,6 +4655,9 @@ static void __sched_fork(unsigned long clone_flags, struct task_struct *p)
+ p->se.prev_sum_exec_runtime = 0;
+ p->se.nr_migrations = 0;
+ p->se.vruntime = 0;
++#ifdef CONFIG_SCHED_BORE
++ sched_fork_bore(p);
++#endif // CONFIG_SCHED_BORE
+ p->se.vlag = 0;
+ p->se.slice = sysctl_sched_base_slice;
+ INIT_LIST_HEAD(&p->se.group_node);
+@@ -4839,6 +4974,9 @@ void sched_cgroup_fork(struct task_struct *p, struct kernel_clone_args *kargs)
+
+ void sched_post_fork(struct task_struct *p)
+ {
++#ifdef CONFIG_SCHED_BORE
++ sched_post_fork_bore(p);
++#endif // CONFIG_SCHED_BORE
+ uclamp_post_fork(p);
+ }
+
+@@ -9910,6 +10048,11 @@ void __init sched_init(void)
+ BUG_ON(&dl_sched_class != &stop_sched_class + 1);
+ #endif
+
++#ifdef CONFIG_SCHED_BORE
++ sched_init_bore();
++ printk(KERN_INFO "BORE (Burst-Oriented Response Enhancer) CPU Scheduler modification 5.1.0 by Masahito Suzuki");
++#endif // CONFIG_SCHED_BORE
++
+ wait_bit_init();
+
+ #ifdef CONFIG_FAIR_GROUP_SCHED
+diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
+index 8d5d98a583..b178612617 100644
+--- a/kernel/sched/debug.c
++++ b/kernel/sched/debug.c
+@@ -167,7 +167,52 @@ static const struct file_operations sched_feat_fops = {
+ };
+
+ #ifdef CONFIG_SMP
++#ifdef CONFIG_SCHED_BORE
++static ssize_t sched_min_base_slice_write(struct file *filp, const char __user *ubuf,
++ size_t cnt, loff_t *ppos)
++{
++ char buf[16];
++ unsigned int value;
++
++ if (cnt > 15)
++ cnt = 15;
++
++ if (copy_from_user(&buf, ubuf, cnt))
++ return -EFAULT;
++ buf[cnt] = '\0';
++
++ if (kstrtouint(buf, 10, &value))
++ return -EINVAL;
+
++ if (!value)
++ return -EINVAL;
++
++ sysctl_sched_min_base_slice = value;
++ sched_update_min_base_slice();
++
++ *ppos += cnt;
++ return cnt;
++}
++
++static int sched_min_base_slice_show(struct seq_file *m, void *v)
++{
++ seq_printf(m, "%d\n", sysctl_sched_min_base_slice);
++ return 0;
++}
++
++static int sched_min_base_slice_open(struct inode *inode, struct file *filp)
++{
++ return single_open(filp, sched_min_base_slice_show, NULL);
++}
++
++static const struct file_operations sched_min_base_slice_fops = {
++ .open = sched_min_base_slice_open,
++ .write = sched_min_base_slice_write,
++ .read = seq_read,
++ .llseek = seq_lseek,
++ .release = single_release,
++};
++#else // !CONFIG_SCHED_BORE
+ static ssize_t sched_scaling_write(struct file *filp, const char __user *ubuf,
+ size_t cnt, loff_t *ppos)
+ {
+@@ -213,7 +258,7 @@ static const struct file_operations sched_scaling_fops = {
+ .llseek = seq_lseek,
+ .release = single_release,
+ };
+-
++#endif // CONFIG_SCHED_BORE
+ #endif /* SMP */
+
+ #ifdef CONFIG_PREEMPT_DYNAMIC
+@@ -347,13 +392,20 @@ static __init int sched_init_debug(void)
+ debugfs_create_file("preempt", 0644, debugfs_sched, NULL, &sched_dynamic_fops);
+ #endif
+
++#ifdef CONFIG_SCHED_BORE
++ debugfs_create_file("min_base_slice_ns", 0644, debugfs_sched, NULL, &sched_min_base_slice_fops);
++ debugfs_create_u32("base_slice_ns", 0400, debugfs_sched, &sysctl_sched_base_slice);
++#else // !CONFIG_SCHED_BORE
+ debugfs_create_u32("base_slice_ns", 0644, debugfs_sched, &sysctl_sched_base_slice);
++#endif // CONFIG_SCHED_BORE
+
+ debugfs_create_u32("latency_warn_ms", 0644, debugfs_sched, &sysctl_resched_latency_warn_ms);
+ debugfs_create_u32("latency_warn_once", 0644, debugfs_sched, &sysctl_resched_latency_warn_once);
+
+ #ifdef CONFIG_SMP
++#if !defined(CONFIG_SCHED_BORE)
+ debugfs_create_file("tunable_scaling", 0644, debugfs_sched, NULL, &sched_scaling_fops);
++#endif // CONFIG_SCHED_BORE
+ debugfs_create_u32("migration_cost_ns", 0644, debugfs_sched, &sysctl_sched_migration_cost);
+ debugfs_create_u32("nr_migrate", 0644, debugfs_sched, &sysctl_sched_nr_migrate);
+
+@@ -595,6 +647,9 @@ print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
+ SPLIT_NS(schedstat_val_or_zero(p->stats.sum_sleep_runtime)),
+ SPLIT_NS(schedstat_val_or_zero(p->stats.sum_block_runtime)));
+
++#ifdef CONFIG_SCHED_BORE
++ SEQ_printf(m, " %2d", p->se.burst_score);
++#endif // CONFIG_SCHED_BORE
+ #ifdef CONFIG_NUMA_BALANCING
+ SEQ_printf(m, " %d %d", task_node(p), task_numa_group_id(p));
+ #endif
+@@ -1068,6 +1123,9 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
+
+ P(se.load.weight);
+ #ifdef CONFIG_SMP
++#ifdef CONFIG_SCHED_BORE
++ P(se.burst_score);
++#endif // CONFIG_SCHED_BORE
+ P(se.avg.load_sum);
+ P(se.avg.runnable_sum);
+ P(se.avg.util_sum);
+diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
+index 533547e3c9..a2346b1b44 100644
+--- a/kernel/sched/fair.c
++++ b/kernel/sched/fair.c
+@@ -19,6 +19,9 @@
+ *
+ * Adaptive scheduling granularity, math enhancements by Peter Zijlstra
+ * Copyright (C) 2007 Red Hat, Inc., Peter Zijlstra
++ *
++ * Burst-Oriented Response Enhancer (BORE) CPU Scheduler
++ * Copyright (C) 2021-2024 Masahito Suzuki <firelzrd@gmail.com>
+ */
+ #include <linux/energy_model.h>
+ #include <linux/mmap_lock.h>
+@@ -64,20 +67,125 @@
+ * SCHED_TUNABLESCALING_LOG - scaled logarithmical, *1+ilog(ncpus)
+ * SCHED_TUNABLESCALING_LINEAR - scaled linear, *ncpus
+ *
+- * (default SCHED_TUNABLESCALING_LOG = *(1+ilog(ncpus))
++ * (BORE default SCHED_TUNABLESCALING_NONE = *1 constant)
++ * (EEVDF default SCHED_TUNABLESCALING_LOG = *(1+ilog(ncpus))
+ */
++#ifdef CONFIG_SCHED_BORE
++unsigned int sysctl_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE;
++#else // !CONFIG_SCHED_BORE
+ unsigned int sysctl_sched_tunable_scaling = SCHED_TUNABLESCALING_LOG;
++#endif // CONFIG_SCHED_BORE
+
+ /*
+ * Minimal preemption granularity for CPU-bound tasks:
+ *
+- * (default: 0.75 msec * (1 + ilog(ncpus)), units: nanoseconds)
++ * (BORE default: max(1 sec / HZ, min_base_slice) constant, units: nanoseconds)
++ * (EEVDF default: 0.75 msec * (1 + ilog(ncpus)), units: nanoseconds)
+ */
++#ifdef CONFIG_SCHED_BORE
++unsigned int sysctl_sched_base_slice = 1000000000ULL / HZ;
++static unsigned int configured_sched_base_slice = 1000000000ULL / HZ;
++unsigned int sysctl_sched_min_base_slice = 2000000ULL;
++#else // !CONFIG_SCHED_BORE
+ unsigned int sysctl_sched_base_slice = 750000ULL;
+ static unsigned int normalized_sysctl_sched_base_slice = 750000ULL;
++#endif // CONFIG_SCHED_BORE
+
+ const_debug unsigned int sysctl_sched_migration_cost = 500000UL;
+
++#ifdef CONFIG_SCHED_BORE
++u8 __read_mostly sched_bore = 1;
++u8 __read_mostly sched_burst_smoothness_long = 1;
++u8 __read_mostly sched_burst_smoothness_short = 0;
++u8 __read_mostly sched_burst_fork_atavistic = 2;
++u8 __read_mostly sched_burst_penalty_offset = 22;
++uint __read_mostly sched_burst_penalty_scale = 1280;
++uint __read_mostly sched_burst_cache_lifetime = 60000000;
++static int __maybe_unused sixty_four = 64;
++static int __maybe_unused maxval_12_bits = 4095;
++
++#define MAX_BURST_PENALTY (39U <<2)
++
++static inline u32 log2plus1_u64_u32f8(u64 v) {
++ u32 msb = fls64(v);
++ s32 excess_bits = msb - 9;
++ u8 fractional = (0 <= excess_bits)? v >> excess_bits: v << -excess_bits;
++ return msb << 8 | fractional;
++}
++
++static inline u32 calc_burst_penalty(u64 burst_time) {
++ u32 greed, tolerance, penalty, scaled_penalty;
++
++ greed = log2plus1_u64_u32f8(burst_time);
++ tolerance = sched_burst_penalty_offset << 8;
++ penalty = max(0, (s32)greed - (s32)tolerance);
++ scaled_penalty = penalty * sched_burst_penalty_scale >> 16;
++
++ return min(MAX_BURST_PENALTY, scaled_penalty);
++}
++
++static inline u64 scale_slice(u64 delta, struct sched_entity *se) {
++ return mul_u64_u32_shr(delta, sched_prio_to_wmult[se->burst_score], 22);
++}
++
++static inline u64 __unscale_slice(u64 delta, u8 score) {
++ return mul_u64_u32_shr(delta, sched_prio_to_weight[score], 10);
++}
++
++static inline u64 unscale_slice(u64 delta, struct sched_entity *se) {
++ return __unscale_slice(delta, se->burst_score);
++}
++
++void reweight_task(struct task_struct *p, int prio);
++
++static void update_burst_score(struct sched_entity *se) {
++ if (!entity_is_task(se)) return;
++ struct task_struct *p = task_of(se);
++ u8 prio = p->static_prio - MAX_RT_PRIO;
++ u8 prev_prio = min(39, prio + se->burst_score);
++
++ se->burst_score = se->burst_penalty >> 2;
++
++ u8 new_prio = min(39, prio + se->burst_score);
++ if (new_prio != prev_prio)
++ reweight_task(p, new_prio);
++}
++
++static void update_burst_penalty(struct sched_entity *se) {
++ se->curr_burst_penalty = calc_burst_penalty(se->burst_time);
++ se->burst_penalty = max(se->prev_burst_penalty, se->curr_burst_penalty);
++ update_burst_score(se);
++}
++
++static inline u32 binary_smooth(u32 new, u32 old) {
++ int increment = new - old;
++ return (0 <= increment)?
++ old + ( increment >> (int)sched_burst_smoothness_long):
++ old - (-increment >> (int)sched_burst_smoothness_short);
++}
++
++static void restart_burst(struct sched_entity *se) {
++ se->burst_penalty = se->prev_burst_penalty =
++ binary_smooth(se->curr_burst_penalty, se->prev_burst_penalty);
++ se->curr_burst_penalty = 0;
++ se->burst_time = 0;
++ update_burst_score(se);
++}
++
++static void restart_burst_rescale_deadline(struct sched_entity *se) {
++ s64 vscaled, wremain, vremain = se->deadline - se->vruntime;
++ u8 prev_score = se->burst_score;
++ restart_burst(se);
++ if (prev_score > se->burst_score) {
++ wremain = __unscale_slice(abs(vremain), prev_score);
++ vscaled = scale_slice(wremain, se);
++ if (unlikely(vremain < 0))
++ vscaled = -vscaled;
++ se->deadline = se->vruntime + vscaled;
++ }
++}
++#endif // CONFIG_SCHED_BORE
++
+ int sched_thermal_decay_shift;
+ static int __init setup_sched_thermal_decay_shift(char *str)
+ {
+@@ -137,6 +245,69 @@ static unsigned int sysctl_numa_balancing_promote_rate_limit = 65536;
+
+ #ifdef CONFIG_SYSCTL
+ static struct ctl_table sched_fair_sysctls[] = {
++#ifdef CONFIG_SCHED_BORE
++ {
++ .procname = "sched_bore",
++ .data = &sched_bore,
++ .maxlen = sizeof(u8),
++ .mode = 0644,
++ .proc_handler = proc_dou8vec_minmax,
++ .extra1 = SYSCTL_ONE,
++ .extra2 = SYSCTL_ONE,
++ },
++ {
++ .procname = "sched_burst_smoothness_long",
++ .data = &sched_burst_smoothness_long,
++ .maxlen = sizeof(u8),
++ .mode = 0644,
++ .proc_handler = proc_dou8vec_minmax,
++ .extra1 = SYSCTL_ZERO,
++ .extra2 = SYSCTL_ONE,
++ },
++ {
++ .procname = "sched_burst_smoothness_short",
++ .data = &sched_burst_smoothness_short,
++ .maxlen = sizeof(u8),
++ .mode = 0644,
++ .proc_handler = proc_dou8vec_minmax,
++ .extra1 = SYSCTL_ZERO,
++ .extra2 = SYSCTL_ONE,
++ },
++ {
++ .procname = "sched_burst_fork_atavistic",
++ .data = &sched_burst_fork_atavistic,
++ .maxlen = sizeof(u8),
++ .mode = 0644,
++ .proc_handler = proc_dou8vec_minmax,
++ .extra1 = SYSCTL_ZERO,
++ .extra2 = SYSCTL_THREE,
++ },
++ {
++ .procname = "sched_burst_penalty_offset",
++ .data = &sched_burst_penalty_offset,
++ .maxlen = sizeof(u8),
++ .mode = 0644,
++ .proc_handler = proc_dou8vec_minmax,
++ .extra1 = SYSCTL_ZERO,
++ .extra2 = &sixty_four,
++ },
++ {
++ .procname = "sched_burst_penalty_scale",
++ .data = &sched_burst_penalty_scale,
++ .maxlen = sizeof(uint),
++ .mode = 0644,
++ .proc_handler = proc_douintvec_minmax,
++ .extra1 = SYSCTL_ZERO,
++ .extra2 = &maxval_12_bits,
++ },
++ {
++ .procname = "sched_burst_cache_lifetime",
++ .data = &sched_burst_cache_lifetime,
++ .maxlen = sizeof(uint),
++ .mode = 0644,
++ .proc_handler = proc_douintvec,
++ },
++#endif // CONFIG_SCHED_BORE
+ #ifdef CONFIG_CFS_BANDWIDTH
+ {
+ .procname = "sched_cfs_bandwidth_slice_us",
+@@ -195,6 +366,13 @@ static inline void update_load_set(struct load_weight *lw, unsigned long w)
+ *
+ * This idea comes from the SD scheduler of Con Kolivas:
+ */
++#ifdef CONFIG_SCHED_BORE
++static void update_sysctl(void) {
++ sysctl_sched_base_slice =
++ max(sysctl_sched_min_base_slice, configured_sched_base_slice);
++}
++void sched_update_min_base_slice(void) { update_sysctl(); }
++#else // !CONFIG_SCHED_BORE
+ static unsigned int get_update_sysctl_factor(void)
+ {
+ unsigned int cpus = min_t(unsigned int, num_online_cpus(), 8);
+@@ -225,6 +403,7 @@ static void update_sysctl(void)
+ SET_SYSCTL(sched_base_slice);
+ #undef SET_SYSCTL
+ }
++#endif // CONFIG_SCHED_BORE
+
+ void __init sched_init_granularity(void)
+ {
+@@ -704,6 +883,9 @@ static void update_entity_lag(struct cfs_rq *cfs_rq, struct sched_entity *se)
+ lag = avg_vruntime(cfs_rq) - se->vruntime;
+
+ limit = calc_delta_fair(max_t(u64, 2*se->slice, TICK_NSEC), se);
++#ifdef CONFIG_SCHED_BORE
++ limit >>= 1;
++#endif // CONFIG_SCHED_BORE
+ se->vlag = clamp(lag, -limit, limit);
+ }
+
+@@ -955,6 +1137,7 @@ struct sched_entity *__pick_last_entity(struct cfs_rq *cfs_rq)
+ * Scheduling class statistics methods:
+ */
+ #ifdef CONFIG_SMP
++#if !defined(CONFIG_SCHED_BORE)
+ int sched_update_scaling(void)
+ {
+ unsigned int factor = get_update_sysctl_factor();
+@@ -966,6 +1149,7 @@ int sched_update_scaling(void)
+
+ return 0;
+ }
++#endif // CONFIG_SCHED_BORE
+ #endif
+ #endif
+
+@@ -1165,7 +1349,13 @@ static void update_curr(struct cfs_rq *cfs_rq)
+ if (unlikely(delta_exec <= 0))
+ return;
+
++#ifdef CONFIG_SCHED_BORE
++ curr->burst_time += delta_exec;
++ update_burst_penalty(curr);
++ curr->vruntime += max(1ULL, calc_delta_fair(delta_exec, curr));
++#else // !CONFIG_SCHED_BORE
+ curr->vruntime += calc_delta_fair(delta_exec, curr);
++#endif // CONFIG_SCHED_BORE
+ update_deadline(cfs_rq, curr);
+ update_min_vruntime(cfs_rq);
+
+@@ -3671,10 +3861,9 @@ dequeue_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *se) { }
+ #endif
+
+ static void reweight_eevdf(struct cfs_rq *cfs_rq, struct sched_entity *se,
+- unsigned long weight)
++ unsigned long weight, u64 avruntime)
+ {
+ unsigned long old_weight = se->load.weight;
+- u64 avruntime = avg_vruntime(cfs_rq);
+ s64 vlag, vslice;
+
+ /*
+@@ -3782,11 +3971,13 @@ static void reweight_entity(struct cfs_rq *cfs_rq, struct sched_entity *se,
+ {
+ bool curr = cfs_rq->curr == se;
+
++ if (curr)
++ update_curr(cfs_rq);
++ u64 avruntime = avg_vruntime(cfs_rq);
++
+ if (se->on_rq) {
+ /* commit outstanding execution time */
+- if (curr)
+- update_curr(cfs_rq);
+- else
++ if (!curr)
+ __dequeue_entity(cfs_rq, se);
+ update_load_sub(&cfs_rq->load, se->load.weight);
+ }
+@@ -3799,7 +3990,7 @@ static void reweight_entity(struct cfs_rq *cfs_rq, struct sched_entity *se,
+ */
+ se->vlag = div_s64(se->vlag * se->load.weight, weight);
+ } else {
+- reweight_eevdf(cfs_rq, se, weight);
++ reweight_eevdf(cfs_rq, se, weight, avruntime);
+ }
+
+ update_load_set(&se->load, weight);
+@@ -5171,6 +5362,9 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int flags)
+ *
+ * EEVDF: placement strategy #1 / #2
+ */
++#ifdef CONFIG_SCHED_BORE
++ if (se->vlag)
++#endif // CONFIG_SCHED_BORE
+ if (sched_feat(PLACE_LAG) && cfs_rq->nr_running) {
+ struct sched_entity *curr = cfs_rq->curr;
+ unsigned long load;
+@@ -6803,6 +6997,14 @@ static void dequeue_task_fair(struct rq *rq, struct task_struct *p, int flags)
+ bool was_sched_idle = sched_idle_rq(rq);
+
+ util_est_dequeue(&rq->cfs, p);
++#ifdef CONFIG_SCHED_BORE
++ if (task_sleep) {
++ cfs_rq = cfs_rq_of(se);
++ if (cfs_rq->curr == se)
++ update_curr(cfs_rq);
++ restart_burst(se);
++ }
++#endif // CONFIG_SCHED_BORE
+
+ for_each_sched_entity(se) {
+ cfs_rq = cfs_rq_of(se);
+@@ -8552,16 +8754,25 @@ static void yield_task_fair(struct rq *rq)
+ /*
+ * Are we the only task in the tree?
+ */
++#if !defined(CONFIG_SCHED_BORE)
+ if (unlikely(rq->nr_running == 1))
+ return;
+
+ clear_buddies(cfs_rq, se);
++#endif // CONFIG_SCHED_BORE
+
+ update_rq_clock(rq);
+ /*
+ * Update run-time statistics of the 'current'.
+ */
+ update_curr(cfs_rq);
++#ifdef CONFIG_SCHED_BORE
++ restart_burst_rescale_deadline(se);
++ if (unlikely(rq->nr_running == 1))
++ return;
++
++ clear_buddies(cfs_rq, se);
++#endif // CONFIG_SCHED_BORE
+ /*
+ * Tell update_rq_clock() that we've just updated,
+ * so we don't do microscopic update in schedule()
+@@ -12651,6 +12862,9 @@ static void task_fork_fair(struct task_struct *p)
+ curr = cfs_rq->curr;
+ if (curr)
+ update_curr(cfs_rq);
++#ifdef CONFIG_SCHED_BORE
++ update_burst_score(se);
++#endif // CONFIG_SCHED_BORE
+ place_entity(cfs_rq, se, ENQUEUE_INITIAL);
+ rq_unlock(rq, &rf);
+ }
+diff --git a/kernel/sched/features.h b/kernel/sched/features.h
+index 143f55df89..3f0fe409f5 100644
+--- a/kernel/sched/features.h
++++ b/kernel/sched/features.h
+@@ -6,7 +6,11 @@
+ */
+ SCHED_FEAT(PLACE_LAG, true)
+ SCHED_FEAT(PLACE_DEADLINE_INITIAL, true)
++#ifdef CONFIG_SCHED_BORE
++SCHED_FEAT(RUN_TO_PARITY, false)
++#else // !CONFIG_SCHED_BORE
+ SCHED_FEAT(RUN_TO_PARITY, true)
++#endif // CONFIG_SCHED_BORE
+
+ /*
+ * Prefer to schedule the task we woke last (assuming it failed
+diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
+index 001fe047bd..da3ad1d4e1 100644
+--- a/kernel/sched/sched.h
++++ b/kernel/sched/sched.h
+@@ -1965,7 +1965,11 @@ static inline void dirty_sched_domain_sysctl(int cpu)
+ }
+ #endif
+
++#ifdef CONFIG_SCHED_BORE
++extern void sched_update_min_base_slice(void);
++#else // !CONFIG_SCHED_BORE
+ extern int sched_update_scaling(void);
++#endif // CONFIG_SCHED_BORE
+
+ static inline const struct cpumask *task_user_cpus(struct task_struct *p)
+ {
+@@ -2552,6 +2556,9 @@ extern const_debug unsigned int sysctl_sched_nr_migrate;
+ extern const_debug unsigned int sysctl_sched_migration_cost;
+
+ extern unsigned int sysctl_sched_base_slice;
++#ifdef CONFIG_SCHED_BORE
++extern unsigned int sysctl_sched_min_base_slice;
++#endif // CONFIG_SCHED_BORE
+
+ #ifdef CONFIG_SCHED_DEBUG
+ extern int sysctl_resched_latency_warn_ms;
+--
+2.34.1
+
diff --git a/sys-kernel/linux-sources-redcore/files/6.8-amd64.config b/sys-kernel/linux-sources-redcore/files/6.8-amd64.config
index 4efc3471..7fa428ce 100644
--- a/sys-kernel/linux-sources-redcore/files/6.8-amd64.config
+++ b/sys-kernel/linux-sources-redcore/files/6.8-amd64.config
@@ -233,6 +233,7 @@ CONFIG_USER_NS_UNPRIVILEGED=y
CONFIG_PID_NS=y
CONFIG_NET_NS=y
CONFIG_CHECKPOINT_RESTORE=y
+CONFIG_SCHED_BORE=y
CONFIG_SCHED_AUTOGROUP=y
CONFIG_RELAY=y
CONFIG_BLK_DEV_INITRD=y
diff --git a/sys-kernel/linux-sources-redcore/linux-sources-redcore-6.8.7.ebuild b/sys-kernel/linux-sources-redcore/linux-sources-redcore-6.8.7-r1.ebuild
index 9a4b2777..aef661c8 100644
--- a/sys-kernel/linux-sources-redcore/linux-sources-redcore-6.8.7.ebuild
+++ b/sys-kernel/linux-sources-redcore/linux-sources-redcore-6.8.7-r1.ebuild
@@ -5,7 +5,7 @@ EAPI=6
inherit eutils
-EXTRAVERSION="redcore"
+EXTRAVERSION="redcore-r1"
KV_FULL="${PV}-${EXTRAVERSION}"
KV_MAJOR="6.8"
@@ -28,6 +28,7 @@ DEPEND="
RDEPEND="${DEPEND}"
PATCHES=(
+ "${FILESDIR}"/"${KV_MAJOR}"-0001-linux6.8.y-bore5.1.0.patch
"${FILESDIR}"/"${KV_MAJOR}"-ath10k-be-quiet.patch
"${FILESDIR}"/"${KV_MAJOR}"-ata-fix-NCQ-LOG-strings-and-move-to-debug.patch
"${FILESDIR}"/"${KV_MAJOR}"-acpi-use-kern_warning_even_when_error.patch
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-03 18:04:36 +0000