Re: [patch] fix the softlockup watchdog to actually work

[Andi Kleen]

Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> writes:
> 
> One possibility is that sched_clock() is bollixed and (say) it's returning
> a 32-bit value.  That'll cause the softlockup logic to get a bit sick when
> time wraps.

FYI, The current ff x86 sched_clock() [which you likely have, it's not
mainline] tends to warp backwards by 80-90ms during cpu freq changes
on AMD on one of my test systems. I haven't tracked down why it does
that yet. Intel or systems with no cpufreq or cpufreq not changing
frequencies regularly are not affected

-Andi
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