[lkml]   [2012]   [Mar]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    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.


     \ /
      Last update: 2012-03-13 14:45    [W:0.018 / U:2.408 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site