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SubjectRe: Why kmem_cache_free occupy CPU for more than 10 seconds?
On 4/11/07, Zhao Forrest <forrest.zhao@gmail.com> wrote:
> We're using RHEL5 with kernel version 2.6.18-8.el5.
> When doing a stress test on raw device for about 3-4 hours, we found
> the soft lockup message in dmesg.
> I know we're not reporting the bug on the latest kernel, but does any
> expert know if this is the known issue in old kernel? Or why
> kmem_cache_free occupy CPU for more than 10 seconds?

Sounds like slab corruption. CONFIG_DEBUG_SLAB should tell you more.
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