diff options
| author |   Ahmed S. Darwish <a.darwish@linutronix.de> | 2020-03-09 18:15:29 +0000 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2020-03-19 09:45:08 +0100 |
| commit | 2c8bd58812ee3dbf0d78b566822f7eacd34bdd7b (patch) | |
| tree | f0e9ed7bef60befd8c82eeecb6e8a459b8f980a9 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | Merge tag 'timers-v5.7' of https://git.linaro.org/people/daniel.lezcano/linux into timers/core (diff) | |
| download | wireguard-linux-2c8bd58812ee3dbf0d78b566822f7eacd34bdd7b.tar.xz wireguard-linux-2c8bd58812ee3dbf0d78b566822f7eacd34bdd7b.zip | |
time/sched_clock: Expire timer in hardirq context
To minimize latency, PREEMPT_RT kernels expires hrtimers in preemptible
softirq context by default. This can be overriden by marking the timer's
expiry with HRTIMER_MODE_HARD.
sched_clock_timer is missing this annotation: if its callback is preempted
and the duration of the preemption exceeds the wrap around time of the
underlying clocksource, sched clock will get out of sync.
Mark the sched_clock_timer for expiry in hard interrupt context.
Signed-off-by: Ahmed S. Darwish <a.darwish@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200309181529.26558-1-a.darwish@linutronix.de
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions