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

To: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, <konrad.wilk@xxxxxxxxxx>, <david.vrabel@xxxxxxxxxx>
From: David Vrabel <david.vrabel@xxxxxxxxxx>
Date: Wed, 2 Dec 2015 17:18:56 +0000
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, stable@xxxxxxxxxxxxxxx
Delivery-date: Wed, 02 Dec 2015 17:19:04 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

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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References:
- [Xen-devel] [PATCH] xen: Resume PMU from non-atomic context
  - From: Boris Ostrovsky

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