diff options
Diffstat (limited to 'packages/sys-kernel/linux-sources-redcore-lts/files/0011-Make-hrtimer-granularity-and-minimum-hrtimeout-confi.patch')
| -rw-r--r-- | packages/sys-kernel/linux-sources-redcore-lts/files/0011-Make-hrtimer-granularity-and-minimum-hrtimeout-confi.patch | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/packages/sys-kernel/linux-sources-redcore-lts/files/0011-Make-hrtimer-granularity-and-minimum-hrtimeout-confi.patch b/packages/sys-kernel/linux-sources-redcore-lts/files/0011-Make-hrtimer-granularity-and-minimum-hrtimeout-confi.patch new file mode 100644 index 0000000..5ac2030 --- /dev/null +++ b/packages/sys-kernel/linux-sources-redcore-lts/files/0011-Make-hrtimer-granularity-and-minimum-hrtimeout-confi.patch @@ -0,0 +1,136 @@ +diff -Nur a/kernel/sysctl.c b/kernel/sysctl.c +--- a/kernel/sysctl.c 2018-11-03 17:03:07.433069521 +0000 ++++ b/kernel/sysctl.c 2018-11-03 17:02:11.020267246 +0000 +@@ -141,7 +141,9 @@ + extern int sched_iso_cpu; + extern int sched_yield_type; + #endif +-#ifdef CONFIG_PRINTK ++extern int hrtimer_granularity_us; ++extern int hrtimeout_min_us; ++#if defined(CONFIG_PRINTK) || defined(CONFIG_SCHED_MUQSS) + static int ten_thousand __read_only = 10000; + #endif + #ifdef CONFIG_PERF_EVENTS +@@ -1119,6 +1121,24 @@ + .extra2 = &two, + }, + #endif ++ { ++ .procname = "hrtimer_granularity_us", ++ .data = &hrtimer_granularity_us, ++ .maxlen = sizeof(int), ++ .mode = 0644, ++ .proc_handler = &proc_dointvec_minmax, ++ .extra1 = &one, ++ .extra2 = &ten_thousand, ++ }, ++ { ++ .procname = "hrtimeout_min_us", ++ .data = &hrtimeout_min_us, ++ .maxlen = sizeof(int), ++ .mode = 0644, ++ .proc_handler = &proc_dointvec_minmax, ++ .extra1 = &one, ++ .extra2 = &ten_thousand, ++ }, + #if defined(CONFIG_S390) && defined(CONFIG_SMP) + { + .procname = "spin_retry", +diff -Nur a/kernel/time/clockevents.c b/kernel/time/clockevents.c +--- a/kernel/time/clockevents.c 2018-11-03 17:03:07.433069521 +0000 ++++ b/kernel/time/clockevents.c 2018-11-03 16:58:17.283800909 +0000 +@@ -198,13 +198,9 @@ + + #ifdef CONFIG_GENERIC_CLOCKEVENTS_MIN_ADJUST + +-#ifdef CONFIG_SCHED_MUQSS ++int __read_mostly hrtimer_granularity_us = 100; + /* Limit min_delta to 100us */ +-#define MIN_DELTA_LIMIT (NSEC_PER_SEC / 10000) +-#else +-/* Limit min_delta to a jiffie */ +-#define MIN_DELTA_LIMIT (NSEC_PER_SEC / HZ) +-#endif ++#define MIN_DELTA_LIMIT (hrtimer_granularity_us * NSEC_PER_USEC) + + /** + * clockevents_increase_min_delta - raise minimum delta of a clock event device +diff -Nur a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c +--- a/kernel/time/hrtimer.c 2018-11-03 17:04:16.448274547 +0000 ++++ b/kernel/time/hrtimer.c 2018-11-03 16:58:17.283800909 +0000 +@@ -1803,7 +1803,7 @@ + long __sched schedule_msec_hrtimeout(long timeout) + { + struct hrtimer_sleeper t; +- int delta, secs, jiffs; ++ int delta, jiffs; + ktime_t expires; + + if (!timeout) { +@@ -1820,9 +1820,8 @@ + if (jiffs > 4 || hrtimer_resolution >= NSEC_PER_SEC / HZ || pm_freezing) + return schedule_timeout(jiffs); + +- secs = timeout / 1000; + delta = (timeout % 1000) * NSEC_PER_MSEC; +- expires = ktime_set(secs, delta); ++ expires = ktime_set(0, delta); + + hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + hrtimer_set_expires_range_ns(&t.timer, expires, delta); +@@ -1846,9 +1845,53 @@ + + EXPORT_SYMBOL(schedule_msec_hrtimeout); + ++#define USECS_PER_SEC 1000000 ++extern int hrtimer_granularity_us; ++ ++static inline long schedule_usec_hrtimeout(long timeout) ++{ ++ struct hrtimer_sleeper t; ++ ktime_t expires; ++ int delta; ++ ++ if (!timeout) { ++ __set_current_state(TASK_RUNNING); ++ return 0; ++ } ++ ++ if (hrtimer_resolution >= NSEC_PER_SEC / HZ) ++ return schedule_timeout(usecs_to_jiffies(timeout)); ++ ++ if (timeout < hrtimer_granularity_us) ++ timeout = hrtimer_granularity_us; ++ delta = (timeout % USECS_PER_SEC) * NSEC_PER_USEC; ++ expires = ktime_set(0, delta); ++ ++ hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); ++ hrtimer_set_expires_range_ns(&t.timer, expires, delta); ++ ++ hrtimer_init_sleeper(&t, current); ++ ++ hrtimer_start_expires(&t.timer, HRTIMER_MODE_REL); ++ ++ if (likely(t.task)) ++ schedule(); ++ ++ hrtimer_cancel(&t.timer); ++ destroy_hrtimer_on_stack(&t.timer); ++ ++ __set_current_state(TASK_RUNNING); ++ ++ expires = hrtimer_expires_remaining(&t.timer); ++ timeout = ktime_to_us(expires); ++ return timeout < 0 ? 0 : timeout; ++} ++ ++int __read_mostly hrtimeout_min_us = 1000; ++ + long __sched schedule_min_hrtimeout(void) + { +- return schedule_msec_hrtimeout(1); ++ return usecs_to_jiffies(schedule_usec_hrtimeout(hrtimeout_min_us)); + } + + EXPORT_SYMBOL(schedule_min_hrtimeout); |