Re: 2.6.32.21 - uptime related crashes?

[john stultz]

On Tue, 2011-07-12 at 10:18 +0900, MINOURA Makoto / çæ ç wrote:
> We're experiencing similar but slightly different
> problems.  Some KVM hosts crash after 210-220 uptime.
> Some of them hits divide-by-zero, but one of them shows:
> 
> [671528.8780080] BUG: soft lockup - CPU#4 stuck for 61s! [kvm:11131]
> 
> (sorry we have no full crash message including the backtrace)
> 
> The host kernel is 2.6.32.11-based (ubuntu 2.6.32-22-server,
> 2.6.32-22.36).
> 
> I'm not sure but probably the task scheduler is confusing by
> the sched_clock overflow?

I'm working on a debug patch that will hopefully trip sched_clock
overflows very early to see if we can't shake these issues out.

thanks
-john


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