From: George Dunlap <george.dunlap@eu.citrix.com>
To: Roger Pau Monne <roger.pau@citrix.com>,
xen-devel@lists.xenproject.org, qemu-devel@nongnu.org
Cc: Kevin Wolf <kwolf@redhat.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Subject: Re: [Qemu-devel] [PATCH v3 for-xen-4.5] xen_disk: fix unmapping of persistent grants
Date: Thu, 13 Nov 2014 19:21:30 +0000 [thread overview]
Message-ID: <546504BA.10506@eu.citrix.com> (raw)
In-Reply-To: <1415900529-10629-1-git-send-email-roger.pau@citrix.com>
On 11/13/2014 05:42 PM, Roger Pau Monne wrote:
> This patch fixes two issues with persistent grants and the disk PV backend
> (Qdisk):
>
> - Keep track of memory regions where persistent grants have been mapped
> since we need to unmap them as a whole. It is not possible to unmap a
> single grant if it has been batch-mapped. A new check has also been added
> to make sure persistent grants are only used if the whole mapped region
> can be persistently mapped in the batch_maps case.
> - Unmap persistent grants before switching to the closed state, so the
> frontend can also free them.
>
> Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
> Reported-by: George Dunlap <george.dunlap@eu.citrix.com>
Tested-by: George Dunlap <george.dunlap@eu.citrix.com>
next prev parent reply other threads:[~2014-11-13 19:22 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-13 17:42 [Qemu-devel] [PATCH v3 for-xen-4.5] xen_disk: fix unmapping of persistent grants Roger Pau Monne
2014-11-13 19:21 ` George Dunlap [this message]
2014-11-13 19:32 ` Konrad Rzeszutek Wilk
2014-11-14 10:18 ` Stefano Stabellini
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