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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2013-08-02 18:29:56 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-08-16 17:55:33 +0200 |
| commit | c2e7fcf53c3cb02b4ada1c66a9bc8a4d97d58aba (patch) | |
| tree | 84cfdcc6d8f29883e7a7d93e2d6028bffa15ff85 /kernel/time/tick-sched.c | |
| parent | 6f1d657668ac3041b65265d3653d7e9172a0d603 (diff) | |
| download | lwn-c2e7fcf53c3cb02b4ada1c66a9bc8a4d97d58aba.tar.gz lwn-c2e7fcf53c3cb02b4ada1c66a9bc8a4d97d58aba.zip | |
nohz: Include local CPU in full dynticks global kick
tick_nohz_full_kick_all() is useful to notify all full dynticks
CPUs that there is a system state change to checkout before
re-evaluating the need for the tick.
Unfortunately this is implemented using smp_call_function_many()
that ignores the local CPU. This CPU also needs to re-evaluate
the tick.
on_each_cpu_mask() is not useful either because we don't want to
re-evaluate the tick state in place but asynchronously from an IPI
to avoid messing up with any random locking scenario.
So lets call tick_nohz_full_kick() from tick_nohz_full_kick_all()
so that the usual irq work takes care of it.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Li Zhong <zhong@linux.vnet.ibm.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1375460996-16329-4-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/time/tick-sched.c')
| -rw-r--r-- | kernel/time/tick-sched.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index adea6fc3ba2a..3612fc77f834 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -246,6 +246,7 @@ void tick_nohz_full_kick_all(void) preempt_disable(); smp_call_function_many(tick_nohz_full_mask, nohz_full_kick_ipi, NULL, false); + tick_nohz_full_kick(); preempt_enable(); } |