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authorMing Lei <ming.lei@canonical.com>2015-10-20 23:13:57 +0800
committerJens Axboe <axboe@fb.com>2015-10-21 15:00:58 -0600
commitcfd0c552a8272d691691f40073654d775836e23a (patch)
tree8c5ee7e38512bde8df889e70b17e855b5d96faf9 /block
parent676d06077f964f06af52c19e59f0409a8880612f (diff)
downloadlinux-sh-cfd0c552a8272d691691f40073654d775836e23a.tar.gz
blk-mq: mark ctx as pending at batch in flush plug path
Most of times, flush plug should be the hottest I/O path, so mark ctx as pending after all requests in the list are inserted. Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Ming Lei <ming.lei@canonical.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
-rw-r--r--block/blk-mq.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 24c528f182ea..159e69bd2c3c 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -990,18 +990,25 @@ void blk_mq_delay_queue(struct blk_mq_hw_ctx *hctx, unsigned long msecs)
}
EXPORT_SYMBOL(blk_mq_delay_queue);
-static void __blk_mq_insert_request(struct blk_mq_hw_ctx *hctx,
- struct request *rq, bool at_head)
+static inline void __blk_mq_insert_req_list(struct blk_mq_hw_ctx *hctx,
+ struct blk_mq_ctx *ctx,
+ struct request *rq,
+ bool at_head)
{
- struct blk_mq_ctx *ctx = rq->mq_ctx;
-
trace_block_rq_insert(hctx->queue, rq);
if (at_head)
list_add(&rq->queuelist, &ctx->rq_list);
else
list_add_tail(&rq->queuelist, &ctx->rq_list);
+}
+
+static void __blk_mq_insert_request(struct blk_mq_hw_ctx *hctx,
+ struct request *rq, bool at_head)
+{
+ struct blk_mq_ctx *ctx = rq->mq_ctx;
+ __blk_mq_insert_req_list(hctx, ctx, rq, at_head);
blk_mq_hctx_mark_pending(hctx, ctx);
}
@@ -1057,8 +1064,9 @@ static void blk_mq_insert_requests(struct request_queue *q,
rq = list_first_entry(list, struct request, queuelist);
list_del_init(&rq->queuelist);
rq->mq_ctx = ctx;
- __blk_mq_insert_request(hctx, rq, false);
+ __blk_mq_insert_req_list(hctx, ctx, rq, false);
}
+ blk_mq_hctx_mark_pending(hctx, ctx);
spin_unlock(&ctx->lock);
blk_mq_run_hw_queue(hctx, from_schedule);