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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2012-11-07 21:03:07 +0100 |
|---|---|---|
| committer | Frederic Weisbecker <fweisbec@gmail.com> | 2012-11-17 19:30:39 +0100 |
| commit | 00b42959106a9ca1c2899e591ae4e9a83ad6af05 (patch) | |
| tree | 7dd755a813fe7a7fe635082fc5010eb73725f2fe /kernel/irq_work.c | |
| parent | 33a5f6261a61af28f7b4c86f9f958da0f206c914 (diff) | |
| download | lwn-00b42959106a9ca1c2899e591ae4e9a83ad6af05.tar.gz lwn-00b42959106a9ca1c2899e591ae4e9a83ad6af05.zip | |
irq_work: Don't stop the tick with pending works
Don't stop the tick if we have pending irq works on the
queue, otherwise if the arch can't raise self-IPIs, we may not
find an opportunity to execute the pending works for a while.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Diffstat (limited to 'kernel/irq_work.c')
| -rw-r--r-- | kernel/irq_work.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/kernel/irq_work.c b/kernel/irq_work.c index 64eddd59ed83..b3c113a14727 100644 --- a/kernel/irq_work.c +++ b/kernel/irq_work.c @@ -99,6 +99,17 @@ bool irq_work_queue(struct irq_work *work) } EXPORT_SYMBOL_GPL(irq_work_queue); +bool irq_work_needs_cpu(void) +{ + struct llist_head *this_list; + + this_list = &__get_cpu_var(irq_work_list); + if (llist_empty(this_list)) + return false; + + return true; +} + /* * Run the irq_work entries on this cpu. Requires to be ran from hardirq * context with local IRQs disabled. |