Re: [PATCH 1/9] ia64: VIRT_CPU_ACCOUNTING (accurate cpu time accounting)

Kenji Kaneshige
2007-11-07T09:46:01Z

> I did run the kernel some more today and noticed some odd "hangs".
> Some processes seemed to get stuck for many seconds and then
> continued again. Didn't have time to try and track what was
> happening. Have you seem snything like this?
>

I've encountered the similar phenomenon several times. I have
not investigated it very much, but I guess it is related to the
problem reported at

http://marc.info/?l=linux-kernel&m\x119303432628668&w=2

The 'wa' field of 'top' command showed that one of cpus is under
100% iowait when I encountered the problem.

Thanks,
Kenji Kaneshige