[Bug 316187] Re: kernel 2.6.24 "Soft lockup" under load on VMWare ESX 3.5

[Colin King]

Once we can reproduce this, I will see if upstream commit
126e01bf92dfc5f0ba91e88be02c473e1506d7d9 will help fix this.

Quoting the patch:

 softlockup: fix NOHZ wakeup
   
    David Miller reported:
   
    |--------------->
    the following commit:
   
    | commit 27ec4407790d075c325e1f4da0a19c56953cce23
    | Author: Ingo Molnar <mingo at elte.hu>
    | Date:   Thu Feb 28 21:00:21 2008 +0100
    |
    |     sched: make cpu_clock() globally synchronous
    |
    |     Alexey Zaytsev reported (and bisected) that the introduction of
    |     cpu_clock() in printk made the timestamps jump back and forth.
    |
    |     Make cpu_clock() more reliable while still keeping it fast when it's
    |     called frequently.
    |
    |     Signed-off-by: Ingo Molnar <mingo at elte.hu>
   
    causes watchdog triggers when a cpu exits NOHZ state when it has been
    there for >= the soft lockup threshold, for example here are some
    messages from a 128 cpu Niagara2 box:
   
    [  168.106406] BUG: soft lockup - CPU#11 stuck for 128s! [dd:3239]
    etc..

-- 
kernel 2.6.24 "Soft lockup" under load on VMWare ESX 3.5
https://bugs.launchpad.net/bugs/316187
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