* [PATCH RESENT] blk-mq: use blk_rq_timeout to limit the max timeout
@ 2018-06-19 7:03 Jianchao Wang
0 siblings, 0 replies; only message in thread
From: Jianchao Wang @ 2018-06-19 7:03 UTC (permalink / raw)
To: axboe; +Cc: linux-block, linux-kernel
blk_rq_timeout is needed to limit the max timeout value, otherwise,
a idle hctx cannot be deactivated timely in shared-tag case.
Fixes: 12f5b931 (blk-mq: Remove generation seqeunce)
Signed-off-by: Jianchao Wang <jianchao.w.wang@oracle.com>
---
block/blk-mq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 70c65bb..ccebe7b 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -868,7 +868,7 @@ static void blk_mq_timeout_work(struct work_struct *work)
blk_mq_queue_tag_busy_iter(q, blk_mq_check_expired, &next);
if (next != 0) {
- mod_timer(&q->timeout, next);
+ mod_timer(&q->timeout, blk_rq_timeout(round_jiffies_up(next)));
} else {
/*
* Request timeouts are handled as a forward rolling timer. If
--
2.7.4
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2018-06-19 7:03 [PATCH RESENT] blk-mq: use blk_rq_timeout to limit the max timeout Jianchao Wang
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