linux-kernel - Re: [PATCH for-4.8] irq/affinity: use get/put_online

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Date:   Mon, 22 Aug 2016 11:01:05 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Christoph Hellwig <hch@...radead.org>
cc:     Christoph Hellwig <hch@....de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH for-4.8] irq/affinity: use get/put_online_cpus

On Sun, 14 Aug 2016, Christoph Hellwig wrote:
> Any chance to get a quick review for this and get it off to Linus?
> Without this fix the function is unusable in 4.8+ on my test systems
> because we seem to always get a inconsistent view of the cpu online
> bitmap - something that didn't happen before this merge window oddly
> enough.

That only happens if you have concurrent cpu hotplug operations, but yes this
needs to be fixed anyway.

Thanks,

	tglx