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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2013-04-20 17:43:13 +0200 |
|---|---|---|
| committer | Frederic Weisbecker <fweisbec@gmail.com> | 2013-04-22 20:29:09 +0200 |
| commit | 67826eae8c16dbf00c262be6ec15021bb42f69c4 (patch) | |
| tree | cbfc0c729a86e1d3e9fbcdfc0a085bd5b740c128 /kernel | |
| parent | nohz: Re-evaluate the tick for the new task after a context switch (diff) | |
| download | linux-67826eae8c16dbf00c262be6ec15021bb42f69c4.tar.xz linux-67826eae8c16dbf00c262be6ec15021bb42f69c4.zip | |
nohz: Disable the tick when irq resume in full dynticks CPU
Eventually try to disable tick on irq exit, now that the
fundamental infrastructure is in place.
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')
| -rw-r--r-- | kernel/softirq.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/kernel/softirq.c b/kernel/softirq.c index de15813f2a66..8b1446d4a4db 100644 --- a/kernel/softirq.c +++ b/kernel/softirq.c @@ -337,6 +337,19 @@ static inline void invoke_softirq(void) } } +static inline void tick_irq_exit(void) +{ +#ifdef CONFIG_NO_HZ_COMMON + int cpu = smp_processor_id(); + + /* Make sure that timer wheel updates are propagated */ + if ((idle_cpu(cpu) && !need_resched()) || tick_nohz_full_cpu(cpu)) { + if (!in_interrupt()) + tick_nohz_irq_exit(); + } +#endif +} + /* * Exit an interrupt context. Process softirqs if needed and possible: */ @@ -348,11 +361,7 @@ void irq_exit(void) if (!in_interrupt() && local_softirq_pending()) invoke_softirq(); -#ifdef CONFIG_NO_HZ_COMMON - /* Make sure that timer wheel updates are propagated */ - if (idle_cpu(smp_processor_id()) && !in_interrupt() && !need_resched()) - tick_nohz_irq_exit(); -#endif + tick_irq_exit(); rcu_irq_exit(); sched_preempt_enable_no_resched(); } |