From: Jianchao Wang <jianchao.w.wang@oracle.com>
To: axboe@kernel.dk
Cc: ming.lei@redhat.com, linux-block@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH V4 4/5] blk-mq: issue directly with bypass 'false' in blk_mq_sched_insert_requests
Date: Fri, 2 Nov 2018 15:08:55 +0800 [thread overview]
Message-ID: <1541142536-1431-5-git-send-email-jianchao.w.wang@oracle.com> (raw)
In-Reply-To: <1541142536-1431-1-git-send-email-jianchao.w.wang@oracle.com>
It is not necessary to issue request directly with bypass 'true'
in blk_mq_sched_insert_requests and insert the non-issued requests
itself. Just set bypass to 'false' and let blk_mq_try_issue_directly
handle them totally.
Signed-off-by: Jianchao Wang <jianchao.w.wang@oracle.com>
---
block/blk-mq-sched.c | 8 +++-----
block/blk-mq.c | 11 +----------
2 files changed, 4 insertions(+), 15 deletions(-)
diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c
index 29bfe80..23cd97e 100644
--- a/block/blk-mq-sched.c
+++ b/block/blk-mq-sched.c
@@ -411,12 +411,10 @@ void blk_mq_sched_insert_requests(struct request_queue *q,
* busy in case of 'none' scheduler, and this way may save
* us one extra enqueue & dequeue to sw queue.
*/
- if (!hctx->dispatch_busy && !e && !run_queue_async) {
+ if (!hctx->dispatch_busy && !e && !run_queue_async)
blk_mq_try_issue_list_directly(hctx, list);
- if (list_empty(list))
- return;
- }
- blk_mq_insert_requests(hctx, ctx, list);
+ else
+ blk_mq_insert_requests(hctx, ctx, list);
}
blk_mq_run_hw_queue(hctx, run_queue_async);
diff --git a/block/blk-mq.c b/block/blk-mq.c
index a0b9b6c..bf8b144 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1832,20 +1832,11 @@ void blk_mq_try_issue_list_directly(struct blk_mq_hw_ctx *hctx,
struct list_head *list)
{
while (!list_empty(list)) {
- blk_status_t ret;
struct request *rq = list_first_entry(list, struct request,
queuelist);
list_del_init(&rq->queuelist);
- ret = blk_mq_request_issue_directly(rq);
- if (ret != BLK_STS_OK) {
- if (ret == BLK_STS_RESOURCE ||
- ret == BLK_STS_DEV_RESOURCE) {
- list_add(&rq->queuelist, list);
- break;
- }
- blk_mq_end_request(rq, ret);
- }
+ blk_mq_try_issue_directly(hctx, rq, NULL, false);
}
}
--
2.7.4
next prev parent reply other threads:[~2018-11-02 7:10 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-02 7:08 [PATCH V4 0/5] blk-mq: refactor and fix on issue request directly Jianchao Wang
2018-11-02 7:08 ` [PATCH V4 1/5] blk-mq: make __blk_mq_issue_directly be able to accept NULL cookie pointer Jianchao Wang
2018-11-02 7:08 ` [PATCH V4 2/5] blk-mq: refactor the code of issue request directly Jianchao Wang
2018-11-02 7:08 ` [PATCH V4 3/5] blk-mq: fix issue directly case when q is stopped or quiesced Jianchao Wang
2018-11-02 7:08 ` Jianchao Wang [this message]
2018-11-02 7:08 ` [PATCH V4 5/5] blk-mq: ensure hctx to be ran on mapped cpu when issue directly Jianchao Wang
2018-11-06 1:37 ` [PATCH V4 0/5] blk-mq: refactor and fix on issue request directly jianchao.wang
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