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| author |   Frederic Weisbecker <frederic@kernel.org> | 2019-10-16 04:56:47 +0200 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2019-10-29 10:01:08 +0100 |
| commit | 802f4a827f139f2581b3c50c69d20f8bf4c24af1 (patch) | |
| tree | 81e4f1ef045fbaa2a8bce0839809102778543bc1 /include/linux/sched.h | |
| parent | sched/fair/util_est: Implement faster ramp-up EWMA on utilization increases (diff) | |
| download | linux-dev-802f4a827f139f2581b3c50c69d20f8bf4c24af1.tar.xz linux-dev-802f4a827f139f2581b3c50c69d20f8bf4c24af1.zip | |
sched/vtime: Record CPU under seqcount for kcpustat needs
In order to compute the kcpustat delta on a nohz CPU, we'll need to
fetch the task running on that target. Checking that its vtime
state snapshot actually refers to the relevant target involves recording
that CPU under the seqcount locked on task switch.
This is a step toward making kcpustat moving forward on full nohz CPUs.
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J . Wysocki <rjw@rjwysocki.net>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Wanpeng Li <wanpengli@tencent.com>
Cc: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
Link: https://lkml.kernel.org/r/20191016025700.31277-2-frederic@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | include/linux/sched.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 2c2e56bd8913..d5d07335a97b 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -259,6 +259,7 @@ struct vtime { seqcount_t seqcount; unsigned long long starttime; enum vtime_state state; + unsigned int cpu; u64 utime; u64 stime; u64 gtime; |