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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-03-13 12:21:27 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-31 14:52:52 +0200 |
| commit | 7f1e2ca9f04b02794597f60e7b1d43f0a1317939 (patch) | |
| tree | dad1d80ab4232f3ca12d7ff9a58f0dc76133dab1 /include/linux/hrtimer.h | |
| parent | 7bee946358c3cb957d4aa648fc5ab3cad0b232d0 (diff) | |
| download | linux-3.10-7f1e2ca9f04b02794597f60e7b1d43f0a1317939.tar.gz linux-3.10-7f1e2ca9f04b02794597f60e7b1d43f0a1317939.tar.bz2 linux-3.10-7f1e2ca9f04b02794597f60e7b1d43f0a1317939.zip | |
hrtimer: fix rq->lock inversion (again)
It appears I inadvertly introduced rq->lock recursion to the
hrtimer_start() path when I delegated running already expired
timers to softirq context.
This patch fixes it by introducing a __hrtimer_start_range_ns()
method that will not use raise_softirq_irqoff() but
__raise_softirq_irqoff() which avoids the wakeup.
It then also changes schedule() to check for pending softirqs and
do the wakeup then, I'm not quite sure I like this last bit, nor
am I convinced its really needed.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: paulus@samba.org
LKML-Reference: <20090313112301.096138802@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/hrtimer.h')
| -rw-r--r-- | include/linux/hrtimer.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h index bd37078c2d7..0d2f7c8a33d 100644 --- a/include/linux/hrtimer.h +++ b/include/linux/hrtimer.h @@ -336,6 +336,11 @@ extern int hrtimer_start(struct hrtimer *timer, ktime_t tim, const enum hrtimer_mode mode); extern int hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim, unsigned long range_ns, const enum hrtimer_mode mode); +extern int +__hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim, + unsigned long delta_ns, + const enum hrtimer_mode mode, int wakeup); + extern int hrtimer_cancel(struct hrtimer *timer); extern int hrtimer_try_to_cancel(struct hrtimer *timer); |