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| author | Stefan Weinhuber <wein@de.ibm.com> | 2005-05-01 08:58:59 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-05-01 08:58:59 -0700 |
| commit | 6ed93c827eea181d87ce078cd1d671128c030b5a (patch) | |
| tree | df6dc11996ff5c2ec3ddf32b754d051d3ec33307 /drivers/s390 | |
| parent | f24acd4503270ed4c842c8fef0b71105285e0a06 (diff) | |
| download | blackbird-op-linux-6ed93c827eea181d87ce078cd1d671128c030b5a.tar.gz blackbird-op-linux-6ed93c827eea181d87ce078cd1d671128c030b5a.zip | |
[PATCH] s390: enable write barriers in the dasd driver
The DASD device driver never reorders the I/O requests and relies on the
hardware to write all data to nonvolatile storage before signaling a
successful write. Hence, the only thing we have to do to support write
barriers is to set the queue ordered flag.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/block/dasd.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index 826fd238034d..02cfe244e069 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -1635,6 +1635,7 @@ dasd_setup_queue(struct dasd_device * device) blk_queue_max_hw_segments(device->request_queue, -1L); blk_queue_max_segment_size(device->request_queue, -1L); blk_queue_segment_boundary(device->request_queue, -1L); + blk_queue_ordered(device->request_queue, 1); } /* |
