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Re: [Xen-devel] [PATCH 5/5] mm: Don't hold heap lock in alloc_heap_pages() longer than necessary

To: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
From: Wei Liu <wei.liu2@xxxxxxxxxx>
Date: Wed, 30 Aug 2017 09:43:10 +0100
Cc: tim@xxxxxxx, sstabellini@xxxxxxxxxx, wei.liu2@xxxxxxxxxx, George.Dunlap@xxxxxxxxxxxxx, andrew.cooper3@xxxxxxxxxx, ian.jackson@xxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxx, jbeulich@xxxxxxxx
Delivery-date: Wed, 30 Aug 2017 08:43:23 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

On Tue, Aug 29, 2017 at 01:09:17PM -0400, Boris Ostrovsky wrote:
> Once pages are removed from the heap we don't need to hold the heap
> lock. It is especially useful to drop it for an unscrubbed buddy since
> we will be scrubbing it.
> 
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
> Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>

Reviewed-by: Wei Liu <wei.liu2@xxxxxxxxxx>

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References:
- [Xen-devel] [PATCH 0/5] Scrubbing updates
  - From: Boris Ostrovsky
- [Xen-devel] [PATCH 5/5] mm: Don't hold heap lock in alloc_heap_pages() longer than necessary
  - From: Boris Ostrovsky

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