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| author | Lars Ellenberg <lars.ellenberg@linbit.com> | 2012-06-25 19:15:38 +0200 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2012-07-24 15:14:28 +0200 |
| commit | a73ff3231df59a4b92ccd0dd4e73897c5822489b (patch) | |
| tree | b4a702fefd94689682a6be89773ef7c59f20db59 /drivers/block/drbd/drbd_main.c | |
| parent | db141b2f42b485b700465fe2401fbe65c65b190c (diff) | |
| download | linux-a73ff3231df59a4b92ccd0dd4e73897c5822489b.tar.gz linux-a73ff3231df59a4b92ccd0dd4e73897c5822489b.tar.bz2 linux-a73ff3231df59a4b92ccd0dd4e73897c5822489b.zip | |
drbd: announce FLUSH/FUA capability to upper layers
Unconditionally announce FLUSH/FUA to upper layers.
If the lower layers on either node do not actually support this,
generic_make_request() will deal with it.
If this causes performance regressions on your setup,
make sure there are no volatile caches involved,
and mount -o nobarrier or equivalent.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers/block/drbd/drbd_main.c')
| -rw-r--r-- | drivers/block/drbd/drbd_main.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index 1ee1404769c2..2e0e7fc1dbba 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -3636,6 +3636,7 @@ struct drbd_conf *drbd_new_device(unsigned int minor) q->backing_dev_info.congested_data = mdev; blk_queue_make_request(q, drbd_make_request); + blk_queue_flush(q, REQ_FLUSH | REQ_FUA); /* Setting the max_hw_sectors to an odd value of 8kibyte here This triggers a max_bio_size message upon first attach or connect */ blk_queue_max_hw_sectors(q, DRBD_MAX_BIO_SIZE_SAFE >> 8); |