Re: [PATCH] Fix the race between smp_call_function and CPU booting

From: Peter Zijlstra
Date: Mon Mar 12 2012 - 13:25:15 EST


On Mon, 2012-03-12 at 09:27 +0000, Liu, Chuansheng wrote:
> The solution is just to send smp call to active cpus instead of online
> cpus.

BTW, that solution is broken because !active cpus can still be online
and actually running stuff, so sending IPIs to them is perfectly fine
and actually required.


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