diff options
| author | Shaohua Li <shli@fb.com> | 2015-01-15 17:32:25 -0800 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-01-23 14:15:46 -0700 |
| commit | ee1b6f7aff94019c09e73837054979063f722046 (patch) | |
| tree | 79c7b943d7c6d62fec1874afd2c50964de054aa0 /drivers | |
| parent | bb5c3cdda37aad22996d6da2addd58cadc0436c0 (diff) | |
| download | blackbird-op-linux-ee1b6f7aff94019c09e73837054979063f722046.tar.gz blackbird-op-linux-ee1b6f7aff94019c09e73837054979063f722046.zip | |
block: support different tag allocation policy
The libata tag allocation is using a round-robin policy. Next patch will
make libata use block generic tag allocation, so let's add a policy to
tag allocation.
Currently two policies: FIFO (default) and round-robin.
Cc: Jens Axboe <axboe@fb.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/block/osdblk.c | 2 | ||||
| -rw-r--r-- | drivers/scsi/scsi_scan.c | 3 |
2 files changed, 3 insertions, 2 deletions
diff --git a/drivers/block/osdblk.c b/drivers/block/osdblk.c index 79aa179305b5..e22942596207 100644 --- a/drivers/block/osdblk.c +++ b/drivers/block/osdblk.c @@ -423,7 +423,7 @@ static int osdblk_init_disk(struct osdblk_device *osdev) } /* switch queue to TCQ mode; allocate tag map */ - rc = blk_queue_init_tags(q, OSDBLK_MAX_REQ, NULL); + rc = blk_queue_init_tags(q, OSDBLK_MAX_REQ, NULL, BLK_TAG_ALLOC_FIFO); if (rc) { blk_cleanup_queue(q); put_disk(disk); diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c index 983aed10ff2f..921a8c897eb2 100644 --- a/drivers/scsi/scsi_scan.c +++ b/drivers/scsi/scsi_scan.c @@ -290,7 +290,8 @@ static struct scsi_device *scsi_alloc_sdev(struct scsi_target *starget, if (!shost_use_blk_mq(sdev->host) && (shost->bqt || shost->hostt->use_blk_tags)) { blk_queue_init_tags(sdev->request_queue, - sdev->host->cmd_per_lun, shost->bqt); + sdev->host->cmd_per_lun, shost->bqt, + shost->hostt->tag_alloc_policy); } scsi_change_queue_depth(sdev, sdev->host->cmd_per_lun); |
