Searched hist:c2e001cc (Results 1 – 1 of 1) sorted by relevance
/qemu/ |
H A D | qemu-io-cmds.c | c2e001cc Sun May 08 03:16:45 GMT 2016 Eric Blake <eblake@redhat.com> qemu-io: Add 'write -z -u' to test MAY_UNMAP flag
Make it easier to control whether the BDRV_REQ_MAY_UNMAP flag can be passed through a write_zeroes command, by adding the '-u' flag to qemu-io 'write -z' and 'aio_write -z'. To be useful, the device has to be opened with BDRV_O_UNMAP (done by default in qemu-io, but can be made explicit with '-d unmap').
Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 1462677405-4752-7-git-send-email-eblake@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
|