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| author | Kiyoshi Ueda <k-ueda@ct.jp.nec.com> | 2009-06-22 10:12:36 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2009-06-22 10:12:36 +0100 |
| commit | 5d67aa2366ccb8257d103d0b43df855605c3c086 (patch) | |
| tree | 1d03f2e89ef47773a757f05b17741b8cbe47e882 /drivers | |
| parent | e6ee8c0b767540f59e20da3ced282601db8aa502 (diff) | |
| download | linux-5d67aa2366ccb8257d103d0b43df855605c3c086.tar.gz linux-5d67aa2366ccb8257d103d0b43df855605c3c086.tar.bz2 linux-5d67aa2366ccb8257d103d0b43df855605c3c086.zip | |
dm: do not set QUEUE_ORDERED_DRAIN if request based
Request-based dm doesn't have barrier support yet.
So we need to set QUEUE_ORDERED_DRAIN only for bio-based dm.
Since the device type is decided at the first table loading time,
the flag set is deferred until then.
Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Acked-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/dm-table.c | 5 | ||||
| -rw-r--r-- | drivers/md/dm.c | 11 | ||||
| -rw-r--r-- | drivers/md/dm.h | 1 |
3 files changed, 16 insertions, 1 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index aaeb82ed2852..4899ebe767c8 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -830,6 +830,11 @@ unsigned dm_table_get_type(struct dm_table *t) return t->type; } +bool dm_table_bio_based(struct dm_table *t) +{ + return dm_table_get_type(t) == DM_TYPE_BIO_BASED; +} + bool dm_table_request_based(struct dm_table *t) { return dm_table_get_type(t) == DM_TYPE_REQUEST_BASED; diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 5a843c1f4d64..00c768860818 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1768,7 +1768,6 @@ static struct mapped_device *alloc_dev(int minor) md->queue->backing_dev_info.congested_fn = dm_any_congested; md->queue->backing_dev_info.congested_data = md; blk_queue_make_request(md->queue, dm_request); - blk_queue_ordered(md->queue, QUEUE_ORDERED_DRAIN, NULL); blk_queue_bounce_limit(md->queue, BLK_BOUNCE_ANY); md->queue->unplug_fn = dm_unplug_all; blk_queue_merge_bvec(md->queue, dm_merge_bvec); @@ -2201,6 +2200,16 @@ int dm_swap_table(struct mapped_device *md, struct dm_table *table) goto out; } + /* + * It is enought that blk_queue_ordered() is called only once when + * the first bio-based table is bound. + * + * This setting should be moved to alloc_dev() when request-based dm + * supports barrier. + */ + if (!md->map && dm_table_bio_based(table)) + blk_queue_ordered(md->queue, QUEUE_ORDERED_DRAIN, NULL); + __unbind(md); r = __bind(md, table, &limits); diff --git a/drivers/md/dm.h b/drivers/md/dm.h index a7663eba17e2..23278ae80f08 100644 --- a/drivers/md/dm.h +++ b/drivers/md/dm.h @@ -61,6 +61,7 @@ int dm_table_any_congested(struct dm_table *t, int bdi_bits); int dm_table_any_busy_target(struct dm_table *t); int dm_table_set_type(struct dm_table *t); unsigned dm_table_get_type(struct dm_table *t); +bool dm_table_bio_based(struct dm_table *t); bool dm_table_request_based(struct dm_table *t); int dm_table_alloc_md_mempools(struct dm_table *t); void dm_table_free_md_mempools(struct dm_table *t); |