linux-kernel - Re: [patch 4/5] xen: Validate online cpus in set

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Message-ID: <5316FE49.1020203@citrix.com>
Date:	Wed, 5 Mar 2014 10:36:57 +0000
From:	David Vrabel <david.vrabel@...rix.com>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Xen <xen-devel@...ts.xenproject.org>
Subject: Re: [patch 4/5] xen: Validate online cpus in set_affinity

On 04/03/14 20:43, Thomas Gleixner wrote:
> The user space interface does not filter out offline cpus. It merily
> verifies that the mask contains at least one online cpu. So the
> selector in the irq chip implementation needs to make sure to pick
> only an online cpu because otherwise:
> 
>      Offline Core 1
>      Set affinity to 0xe
>      Selector will pick first set bit, i.e. core 1

Reviewed-by: David Vrabel <david.vrabel@...rix.com>

Thanks.

David
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