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Date: Tue, 23 Nov 2010 18:16:08 +0100 From: Peter Zijlstra <a.p.zijlstra@...llo.nl> To: Oleg Nesterov <oleg@...hat.com> Cc: linux-tip-commits@...r.kernel.org, linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com, tglx@...utronix.de, mingo@...e.hu Subject: Re: [tip:sched/core] cpu: Remove incorrect BUG_ON On Tue, 2010-11-23 at 16:08 +0100, Oleg Nesterov wrote: > > Ah,. uhm,. you mean, not do anything at all? > > > > Dunno, really, let me try and read the code there. > > Thanks. This is very minor of course, but it would be nice to > undestand the reason. To me it looks unneeded, but I don't trust > myself. (snippets from my previous email below). > > I think because the call to __cpu_die (-> native_cpu_die) relies on the remote cpu running the idle thread, and the CPU_DEAD notifier callback wants to run with the guarantee the remote cpu is in fact dead as a doornail. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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