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2013-03-28qcow2: Improve check for overlapping allocationsKevin Wolf
The old code detected an overlapping allocation even when the allocations didn't actually overlap, but were only adjacent. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2012-06-15qemu-iotests: COW with many AIO requests on the same clusterKevin Wolf
This one is a bit more interesting. The COW operation isn't performed completely synchronously, and therefore dependencies must be handled correctly when multiple requests write to the same unallocated cluster. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>