qcow2: Set MIN_L2_CACHE_SIZE to 2
The L2 cache must cover at least two L2 tables, because during COW two L2 tables are accessed simultaneously. Reported-by:Alexander Graf <agraf@suse.de> Cc: qemu-stable <qemu-stable@nongnu.org> Signed-off-by:
Max Reitz <mreitz@redhat.com> Tested-by:
Alexander Graf <agraf@suse.de> Reviewed-by:
Alberto Garcia <berto@igalia.com> Signed-off-by:
Kevin Wolf <kwolf@redhat.com> (cherry picked from commit 57e21669) Signed-off-by:
Michael Roth <mdroth@linux.vnet.ibm.com>
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