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| H A D | loop.c | diff 68db1961bbf4e16c220ccec4a780e966bc1fece3 Tue Mar 24 06:29:54 CDT 2009 Nikanth Karthikesan <knikanth@suse.de> loop: support barrier writes
Honour barrier requests in the loop back block device driver.
In case of barrier bios, flush the backing file once before processing the
barrier and once after to guarantee ordering. In case of filesystems that
does not support fsync, barrier bios would be failed with -EOPNOTSUPP.
Signed-off-by: Nikanth Karthikesan <knikanth@suse.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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