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| author | Shaohua Li <shli@fb.com> | 2015-01-23 14:18:00 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-01-23 14:18:00 -0700 |
| commit | 24391c0dc57c3756a219defaa781e68637d6ab7d (patch) | |
| tree | 4d0e5b213c017e622d69d916c9e13e7f6e805368 /block/blk-mq.c | |
| parent | ee1b6f7aff94019c09e73837054979063f722046 (diff) | |
| download | linux-24391c0dc57c3756a219defaa781e68637d6ab7d.tar.gz linux-24391c0dc57c3756a219defaa781e68637d6ab7d.tar.bz2 linux-24391c0dc57c3756a219defaa781e68637d6ab7d.zip | |
blk-mq: add tag allocation policy
This is the blk-mq part to support tag allocation policy. The default
allocation policy isn't changed (though it's not a strict FIFO). The new
policy is round-robin for libata. But it's a try-best implementation. If
multiple tasks are competing, the tags returned will be mixed (which is
unavoidable even with !mq, as requests from different tasks can be
mixed in queue)
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 'block/blk-mq.c')
| -rw-r--r-- | block/blk-mq.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index a7d4a988516f..eb8e694fda06 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1374,7 +1374,8 @@ static struct blk_mq_tags *blk_mq_init_rq_map(struct blk_mq_tag_set *set, size_t rq_size, left; tags = blk_mq_init_tags(set->queue_depth, set->reserved_tags, - set->numa_node); + set->numa_node, + BLK_MQ_FLAG_TO_ALLOC_POLICY(set->flags)); if (!tags) return NULL; |