Message ID | 20180614083417.GB18536@lst.de (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
В сообщении от Thursday 14 June 2018 11:34:17 hch@lst.de написал(а): > Andrew, can you test the patch below, please? Patch seems to work as well as previous one - I can boot with no warnings and suspend/resume. Linux version 4.17.0-x64-11928-g2837461dbe6f-dirty (sorry for some "AMD-Vi: Event logged" spam - it just sound acting strange sometimes, I filled additional bug about it in kernel bugzilla) > > --- > From ccf385c63e30e8633b771604bed0e09c895e9175 Mon Sep 17 00:00:00 2001 > From: Christoph Hellwig <hch@lst.de> > Date: Thu, 14 Jun 2018 10:25:36 +0200 > Subject: blk-mq: don't time out requests again that are in the timeout > handler > > Signed-off-by: Christoph Hellwig <hch@lst.de> > --- > block/blk-mq.c | 5 +++++ > include/linux/blkdev.h | 2 ++ > 2 files changed, 7 insertions(+) > > diff --git a/block/blk-mq.c b/block/blk-mq.c > index e9da5e6a8526..54332db09e5d 100644 > --- a/block/blk-mq.c > +++ b/block/blk-mq.c > @@ -671,6 +671,7 @@ static void __blk_mq_requeue_request(struct request > *rq) > > if (blk_mq_request_started(rq)) { > WRITE_ONCE(rq->state, MQ_RQ_IDLE); > + rq->rq_flags &= ~RQF_TIMED_OUT; > if (q->dma_drain_size && blk_rq_bytes(rq)) > rq->nr_phys_segments--; > } > @@ -770,6 +771,7 @@ EXPORT_SYMBOL(blk_mq_tag_to_rq); > > static void blk_mq_rq_timed_out(struct request *req, bool reserved) > { > + req->rq_flags |= RQF_TIMED_OUT; > if (req->q->mq_ops->timeout) { > enum blk_eh_timer_return ret; > > @@ -779,6 +781,7 @@ static void blk_mq_rq_timed_out(struct request *req, > bool reserved) WARN_ON_ONCE(ret != BLK_EH_RESET_TIMER); > } > > + req->rq_flags &= ~RQF_TIMED_OUT; > blk_add_timer(req); > } > > @@ -788,6 +791,8 @@ static bool blk_mq_req_expired(struct request *rq, > unsigned long *next) > > if (blk_mq_rq_state(rq) != MQ_RQ_IN_FLIGHT) > return false; > + if (rq->rq_flags & RQF_TIMED_OUT) > + return false; > > deadline = blk_rq_deadline(rq); > if (time_after_eq(jiffies, deadline)) > diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h > index bca3a92eb55f..fa6f11751430 100644 > --- a/include/linux/blkdev.h > +++ b/include/linux/blkdev.h > @@ -127,6 +127,8 @@ typedef __u32 __bitwise req_flags_t; > #define RQF_ZONE_WRITE_LOCKED ((__force req_flags_t)(1 << 19)) > /* already slept for hybrid poll */ > #define RQF_MQ_POLL_SLEPT ((__force req_flags_t)(1 << 20)) > +/* ->timeout has been called, don't expire again */ > +#define RQF_TIMED_OUT ((__force req_flags_t)(1 << 21)) > > /* flags that prevent us from merging requests: */ > #define RQF_NOMERGE_FLAGS \
diff --git a/block/blk-mq.c b/block/blk-mq.c index e9da5e6a8526..54332db09e5d 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -671,6 +671,7 @@ static void __blk_mq_requeue_request(struct request *rq) if (blk_mq_request_started(rq)) { WRITE_ONCE(rq->state, MQ_RQ_IDLE); + rq->rq_flags &= ~RQF_TIMED_OUT; if (q->dma_drain_size && blk_rq_bytes(rq)) rq->nr_phys_segments--; } @@ -770,6 +771,7 @@ EXPORT_SYMBOL(blk_mq_tag_to_rq); static void blk_mq_rq_timed_out(struct request *req, bool reserved) { + req->rq_flags |= RQF_TIMED_OUT; if (req->q->mq_ops->timeout) { enum blk_eh_timer_return ret; @@ -779,6 +781,7 @@ static void blk_mq_rq_timed_out(struct request *req, bool reserved) WARN_ON_ONCE(ret != BLK_EH_RESET_TIMER); } + req->rq_flags &= ~RQF_TIMED_OUT; blk_add_timer(req); } @@ -788,6 +791,8 @@ static bool blk_mq_req_expired(struct request *rq, unsigned long *next) if (blk_mq_rq_state(rq) != MQ_RQ_IN_FLIGHT) return false; + if (rq->rq_flags & RQF_TIMED_OUT) + return false; deadline = blk_rq_deadline(rq); if (time_after_eq(jiffies, deadline)) diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index bca3a92eb55f..fa6f11751430 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -127,6 +127,8 @@ typedef __u32 __bitwise req_flags_t; #define RQF_ZONE_WRITE_LOCKED ((__force req_flags_t)(1 << 19)) /* already slept for hybrid poll */ #define RQF_MQ_POLL_SLEPT ((__force req_flags_t)(1 << 20)) +/* ->timeout has been called, don't expire again */ +#define RQF_TIMED_OUT ((__force req_flags_t)(1 << 21)) /* flags that prevent us from merging requests: */ #define RQF_NOMERGE_FLAGS \