linux-kernel - Re: [Xen-devel] [PATCH] xen: Resume PMU from non-atomic context

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Message-ID: <565F2800.2040303@citrix.com>
Date:	Wed, 2 Dec 2015 17:18:56 +0000
From:	David Vrabel <david.vrabel@...rix.com>
To:	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	<konrad.wilk@...cle.com>, <david.vrabel@...rix.com>
CC:	<xen-devel@...ts.xenproject.org>, <linux-kernel@...r.kernel.org>,
	<stable@...r.kernel.org>
Subject: Re: [Xen-devel] [PATCH] xen: Resume PMU from non-atomic context

On 02/12/15 17:10, Boris Ostrovsky wrote:
> Resuming PMU currently triggers a warning from ___might_sleep() (assuming
> CONFIG_DEBUG_ATOMIC_SLEEP is set) when xen_pmu_init() allocates GFP_KERNEL
> page because we are in state resembling atomic context.
> 
> Move resuming PMU to xen_arch_resume() which is called in regular context.
> For symmetry move suspending PMU to xen_arch_suspend() as well.

Applied to for-linus-4.4, thanks.

David
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