linux-kernel - Re: [PATCH 1/2] Revert "arm64: use cpu_online_mask when using forced irq_set

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Date:	Thu, 28 Aug 2014 10:38:26 +0100
From:	Will Deacon <will.deacon@....com>
To:	"byungchul.park@....com" <byungchul.park@....com>
Cc:	Sudeep Holla <Sudeep.Holla@....com>,
	Catalin Marinas <Catalin.Marinas@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] Revert "arm64: use cpu_online_mask when using forced
 irq_set_affinity"

On Wed, Aug 27, 2014 at 10:30:06AM +0100, byungchul.park@....com wrote:
> From: Byungchul Park <byungchul.park@....com>
> 
> This reverts commit 601c942176d8ad8334118bddb747e3720bed24f8.
> 
> This patch is designed to ensure that the cpu being offlined is not
> present in the affinity mask. But it is a bad idea to overwrite the
> affinity variable with cpu_online_mask, even in case that the current
> affinity already includes onlined cpus.
> 
> So revert this patch to replace it with another one doing exactly
> what it intends.

Sudeep: what's the right way forward for this? There seems to be general
agreement that the existing code is broken, but a bunch of different
`fixes'. Can we just take a straight port of what tglx proposed for ARM?
(changing force to false)

Will
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