lkml.org 
[lkml]   [2012]   [Mar]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] watchdog: make sure the watchdog thread gets CPU on loaded system
On Tue, Mar 13, 2012 at 10:45:22AM +0100, Michal Hocko wrote:
> If the system is loaded while hotplugging a CPU we might end up with a bogus
> hardlockup detection. This has been seen during LTP pounder test executed
> in parallel with hotplug test.
>
> The main problem is that enable_watchdog (called when CPU is brought up)
> registers perf event which periodically checks per-cpu counter
> (hrtimer_interrupts), updated from a hrtimer callback, but the hrtimer is fired
> from the kernel thread.

Seems reasonable to me. I'll apply it.

Thanks,
Don


\
 
 \ /
  Last update: 2012-03-13 14:45    [W:0.029 / U:0.104 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site