
The bdrv_qed_is_allocated() function is a synchronous wrapper around qed_find_cluster(), which performs the cluster lookup. In order to convert the synchronous function to a coroutine function we yield instead of using qemu_aio_wait(). Note that QED's cache is already safe for parallel requests so no locking is needed. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Read the documentation in qemu-doc.html. Fabrice Bellard.
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