From b4a23d586f3196e812f2a20cbbf040128d0c1c40 Mon Sep 17 00:00:00 2001 From: V3n3RiX Date: Tue, 11 Feb 2020 09:05:31 +0000 Subject: sys-kernel : move kernel 4.19.xx to sys-kernel/linux-{image,sources}-redcore-lts-legacy --- ...e-calls-of-schedule_timeout-1-to-use-the-.patch | 49 ++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 sys-kernel/linux-image-redcore-lts-legacy/files/4.19-0006-Special-case-calls-of-schedule_timeout-1-to-use-the-.patch (limited to 'sys-kernel/linux-image-redcore-lts-legacy/files/4.19-0006-Special-case-calls-of-schedule_timeout-1-to-use-the-.patch') diff --git a/sys-kernel/linux-image-redcore-lts-legacy/files/4.19-0006-Special-case-calls-of-schedule_timeout-1-to-use-the-.patch b/sys-kernel/linux-image-redcore-lts-legacy/files/4.19-0006-Special-case-calls-of-schedule_timeout-1-to-use-the-.patch new file mode 100644 index 00000000..aa348475 --- /dev/null +++ b/sys-kernel/linux-image-redcore-lts-legacy/files/4.19-0006-Special-case-calls-of-schedule_timeout-1-to-use-the-.patch @@ -0,0 +1,49 @@ +From 65ea992f1da66b8c0a5554776d1350417b9107cb Mon Sep 17 00:00:00 2001 +From: Con Kolivas +Date: Sat, 5 Nov 2016 09:27:36 +1100 +Subject: [PATCH 06/16] Special case calls of schedule_timeout(1) to use the + min hrtimeout of 1ms, working around low Hz resolutions. + +--- + kernel/time/timer.c | 16 ++++++++++++++-- + 1 file changed, 14 insertions(+), 2 deletions(-) + +diff --git a/kernel/time/timer.c b/kernel/time/timer.c +index 981eaddff95b..ae942d459aa2 100644 +--- a/kernel/time/timer.c ++++ b/kernel/time/timer.c +@@ -1801,6 +1801,18 @@ signed long __sched schedule_timeout(signed long timeout) + + expire = timeout + jiffies; + ++#ifdef CONFIG_HIGH_RES_TIMERS ++ if (timeout == 1 && hrtimer_resolution < NSEC_PER_SEC / HZ) { ++ /* ++ * Special case 1 as being a request for the minimum timeout ++ * and use highres timers to timeout after 1ms to workaround ++ * the granularity of low Hz tick timers. ++ */ ++ if (!schedule_min_hrtimeout()) ++ return 0; ++ goto out_timeout; ++ } ++#endif + timer.task = current; + timer_setup_on_stack(&timer.timer, process_timeout, 0); + __mod_timer(&timer.timer, expire, 0); +@@ -1809,10 +1821,10 @@ signed long __sched schedule_timeout(signed long timeout) + + /* Remove the timer from the object tracker */ + destroy_timer_on_stack(&timer.timer); +- ++out_timeout: + timeout = expire - jiffies; + +- out: ++out: + return timeout < 0 ? 0 : timeout; + } + EXPORT_SYMBOL(schedule_timeout); +-- +2.17.1 + -- cgit v1.2.3