On Mon, Mar 02, 2015 at 11:33:33PM +0900, Naoya Horiguchi wrote:
> Yes, CPU offlining is one option to keep other CPUs quiet. I'm not sure why
> current kexec implementation doesn't offline the other CPUs but just doing
> cpu_relax() loop, but my guess is that in some kernel panic situation (like
> soft lockup) we want to keep CPUs' status undisturbed to make sure the bug's
> info is captured in kdump.
Well either offlining or keeping them in the idle loop is fine - they're
not executing anything else and thus the probability of them causing an
MCE becomes disappearingly small.
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
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