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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2013-04-20 17:11:50 +0200 |
|---|---|---|
| committer | Frederic Weisbecker <fweisbec@gmail.com> | 2013-04-22 20:29:07 +0200 |
| commit | 99e5ada9407cc19d7c4c05ce2165f20dc46fc093 (patch) | |
| tree | 6d39bf6095e18b82f78b3cc405d49fbb8836b299 /kernel/sched | |
| parent | 5811d9963e26146898a24b535b301f7654257f8a (diff) | |
| download | linux-99e5ada9407cc19d7c4c05ce2165f20dc46fc093.tar.gz linux-99e5ada9407cc19d7c4c05ce2165f20dc46fc093.tar.bz2 linux-99e5ada9407cc19d7c4c05ce2165f20dc46fc093.zip | |
nohz: Re-evaluate the tick for the new task after a context switch
When a task is scheduled in, it may have some properties
of its own that could make the CPU reconsider the need for
the tick: posix cpu timers, perf events, ...
So notify the full dynticks subsystem when a task gets
scheduled in and re-check the tick dependency at this
stage. This is done through a self IPI to avoid messing
up with any current lock scenario.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Geoff Levand <geoff@infradead.org>
Cc: Gilad Ben Yossef <gilad@benyossef.com>
Cc: Hakan Akkan <hakanakkan@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Kevin Hilman <khilman@linaro.org>
Cc: Li Zhong <zhong@linux.vnet.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/core.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 9ad35005f1cb..dd09def88567 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -1896,6 +1896,8 @@ static void finish_task_switch(struct rq *rq, struct task_struct *prev) kprobe_flush_task(prev); put_task_struct(prev); } + + tick_nohz_task_switch(current); } #ifdef CONFIG_SMP |