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blk-mq: allocate flush_rq in blk_mq_init_flush()

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It is reasonable to allocate flush req in blk_mq_init_flush().

Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Ming Lei <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Ming Lei 2014-09-25 23:23:39 +08:00 • committed by Jens Axboe
commit 1bcb1eada4
3 changed files with 17 additions and 12 deletions
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11
block/blk-flush.c
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@ -472,7 +472,16 @@ int blkdev_issue_flush(struct block_device *bdev, gfp_t gfp_mask,
}
EXPORT_SYMBOL(blkdev_issue_flush);
void blk_mq_init_flush(struct request_queue *q)
int blk_mq_init_flush(struct request_queue *q)
{
struct blk_mq_tag_set *set = q->tag_set;
spin_lock_init(&q->mq_flush_lock);
q->flush_rq = kzalloc(round_up(sizeof(struct request) +
set->cmd_size, cache_line_size()),
GFP_KERNEL);
if (!q->flush_rq)
return -ENOMEM;
return 0;
}