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author | Kevin Wolf <kwolf@redhat.com> | 2015-05-06 13:21:51 +0200 |
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committer | Michael Roth <mdroth@linux.vnet.ibm.com> | 2015-07-28 18:19:33 -0500 |
commit | ad9c167fd21b488c1c8cfda77e8542a97aefc14f (patch) | |
tree | 61fe4f36965f6cc51ac7ceb5d656141f15e106db /.mailmap | |
parent | d8e231fce23d49e2f15f2d098463ec110c6eaa56 (diff) | |
download | qemu-ad9c167fd21b488c1c8cfda77e8542a97aefc14f.tar.gz |
qcow2: Flush pending discards before allocating cluster
Before a freed cluster can be reused, pending discards for this cluster
must be processed.
The original assumption was that this was not a problem because discards
are only cached during discard/write zeroes operations, which are
synchronous so that no concurrent write requests can cause cluster
allocations.
However, the discard/write zeroes operation itself can allocate a new L2
table (and it has to in order to put zero flags there), so make sure we
can cope with the situation.
This fixes https://bugs.launchpad.net/bugs/1349972.
Cc: qemu-stable@nongnu.org
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
(cherry picked from commit ecbda7a22576591a84f44de1be0150faf6001f1c)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Diffstat (limited to '.mailmap')
0 files changed, 0 insertions, 0 deletions