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. -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/