Max Reitz c1e3489dfa block: Document BDRV_REQ_WRITE_UNCHANGED support
Add BDRV_REQ_WRITE_UNCHANGED to the list of flags honored during pwrite
and pwrite_zeroes, and also add a note on when you absolutely need to
support it.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20180502140359.18222-1-mreitz@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
2018-05-15 16:15:21 +02:00
..
2018-05-15 10:04:22 +01:00
2018-05-09 00:13:37 +02:00
2018-04-27 11:36:34 +02:00