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[Xen-devel] [PATCH 0/2] xen/gntalloc: fix oopses after running out of grant refs

To: <xen-devel@xxxxxxxxxxxxxxxxxxxx>
From: David Vrabel <david.vrabel@xxxxxxxxxx>
Date: Tue, 2 Sep 2014 15:21:28 +0100
Cc: Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, Dave Scott <dave.scott@xxxxxxxxxx>, David Vrabel <david.vrabel@xxxxxxxxxx>
Delivery-date: Tue, 02 Sep 2014 14:22:10 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

These two patches fix oopses that happen if a grant failed because
there are no free grant references.

This would not happen on a typical system with the default options as
the gntalloc device limits the number of pages that may be granted and
this check fails first, but could be triggered on VM with many PV
devices or if the limit is increase.

David


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Follow-Ups:
- [Xen-devel] [PATCH 1/2] xen/gntalloc: fix oops after runnning out of grant refs
  - From: David Vrabel
- [Xen-devel] [PATCH 2/2] xen/gntalloc: safely delete grefs in add_grefs() undo path
  - From: David Vrabel

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