* [bisected] Strange slowdowns timerfd related
@ 2011-05-25 20:27 Markus Trippelsdorf
2011-05-25 21:10 ` Thomas Gleixner
0 siblings, 1 reply; 2+ messages in thread
From: Markus Trippelsdorf @ 2011-05-25 20:27 UTC (permalink / raw)
To: linux-kernel; +Cc: Thomas Gleixner, Peter Zijlstra
I've tested the latest git-kernel today and did experience long delays
in Firefox. Just opening a new tab would take a few seconds and after
typing a few characters into the "awesome bar" I would have to wait ages
before the results were shown.
This is the bisection result:
commit 9ec2690758a5467f24beb301cca5098078073bba
Author: Thomas Gleixner <tglx@linutronix.de>
Date: Fri May 20 16:18:50 2011 +0200
timerfd: Manage cancelable timers in timerfd
Reverting the commit above fixes the problem.
--
Markus
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [bisected] Strange slowdowns timerfd related
2011-05-25 20:27 [bisected] Strange slowdowns timerfd related Markus Trippelsdorf
@ 2011-05-25 21:10 ` Thomas Gleixner
0 siblings, 0 replies; 2+ messages in thread
From: Thomas Gleixner @ 2011-05-25 21:10 UTC (permalink / raw)
To: Markus Trippelsdorf; +Cc: linux-kernel, Peter Zijlstra
On Wed, 25 May 2011, Markus Trippelsdorf wrote:
> I've tested the latest git-kernel today and did experience long delays
> in Firefox. Just opening a new tab would take a few seconds and after
> typing a few characters into the "awesome bar" I would have to wait ages
> before the results were shown.
>
> This is the bisection result:
>
> commit 9ec2690758a5467f24beb301cca5098078073bba
> Author: Thomas Gleixner <tglx@linutronix.de>
> Date: Fri May 20 16:18:50 2011 +0200
>
> timerfd: Manage cancelable timers in timerfd
>
> Reverting the commit above fixes the problem.
Yes, Linus came to the same result. Fix below.
Thanks,
tglx_hidden_under_a_brown_paperbag
------->
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index c541ee5..a9205e3 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -748,7 +748,7 @@ static inline void retrigger_next_event(void *arg) { }
*/
void clock_was_set(void)
{
-#ifdef CONFIG_HIGHRES_TIMERS
+#ifdef CONFIG_HIGH_RES_TIMERS
/* Retrigger the CPU local events everywhere */
on_each_cpu(retrigger_next_event, NULL, 1);
#endif
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2011-05-25 21:10 ` Thomas Gleixner
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