diff options
Diffstat (limited to 'block/blk-mq.c')
| -rw-r--r-- | block/blk-mq.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index 7ca0b47246a6..a05ce7725031 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2180,6 +2180,14 @@ void blk_mq_delay_run_hw_queues(struct request_queue *q, unsigned long msecs) if (blk_mq_hctx_stopped(hctx)) continue; /* + * If there is already a run_work pending, leave the + * pending delay untouched. Otherwise, a hctx can stall + * if another hctx is re-delaying the other's work + * before the work executes. + */ + if (delayed_work_pending(&hctx->run_work)) + continue; + /* * Dispatch from this hctx either if there's no hctx preferred * by IO scheduler or if it has requests that bypass the * scheduler. |