| Message ID | 32b0bd88-cb8e-754a-89fc-b1825778b05a@sandisk.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
On 10/27/2016 12:52 AM, Bart Van Assche wrote: > Move the "hctx stopped" test and the insert request calls into > blk_mq_direct_issue_request(). Rename that function into > blk_mq_try_issue_directly() to reflect its new semantics. Pass > the hctx pointer to that function instead of looking it up a > second time. These changes avoid that code has to be duplicated > in the next patch. > > Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> > Cc: Christoph Hellwig <hch@lst.de> > Cc: Hannes Reinecke <hare@suse.com> > Cc: Sagi Grimberg <sagi@grimberg.me> > Cc: Johannes Thumshirn <jthumshirn@suse.de> > --- > block/blk-mq.c | 18 ++++++++++-------- > 1 file changed, 10 insertions(+), 8 deletions(-) > Reviewed-by: Hannes Reinecke <hare@suse.com> Cheers, Hannes
On Wed, Oct 26, 2016 at 03:52:35PM -0700, Bart Van Assche wrote: > Move the "hctx stopped" test and the insert request calls into > blk_mq_direct_issue_request(). Rename that function into > blk_mq_try_issue_directly() to reflect its new semantics. Pass > the hctx pointer to that function instead of looking it up a > second time. These changes avoid that code has to be duplicated > in the next patch. > > Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> > Cc: Christoph Hellwig <hch@lst.de> Looks good, Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
On Wed, Oct 26, 2016 at 03:52:35PM -0700, Bart Van Assche wrote: > Move the "hctx stopped" test and the insert request calls into > blk_mq_direct_issue_request(). Rename that function into > blk_mq_try_issue_directly() to reflect its new semantics. Pass > the hctx pointer to that function instead of looking it up a > second time. These changes avoid that code has to be duplicated > in the next patch. > > Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> > Cc: Christoph Hellwig <hch@lst.de> Looks good, Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Looks good,
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
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Looks good:
Reviewed-by: Christoph Hellwig <hch@lst.de>
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diff --git a/block/blk-mq.c b/block/blk-mq.c index 4643fa8..0cf21c2 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1243,11 +1243,11 @@ static struct request *blk_mq_map_request(struct request_queue *q, return rq; } -static int blk_mq_direct_issue_request(struct request *rq, blk_qc_t *cookie) +static void blk_mq_try_issue_directly(struct blk_mq_hw_ctx *hctx, + struct request *rq, blk_qc_t *cookie) { int ret; struct request_queue *q = rq->q; - struct blk_mq_hw_ctx *hctx = blk_mq_map_queue(q, rq->mq_ctx->cpu); struct blk_mq_queue_data bd = { .rq = rq, .list = NULL, @@ -1255,6 +1255,9 @@ static int blk_mq_direct_issue_request(struct request *rq, blk_qc_t *cookie) }; blk_qc_t new_cookie = blk_tag_to_qc_t(rq->tag, hctx->queue_num); + if (blk_mq_hctx_stopped(hctx)) + goto insert; + /* * For OK queue, we are done. For error, kill it. Any other * error (busy), just add it to our list as we previously @@ -1263,7 +1266,7 @@ static int blk_mq_direct_issue_request(struct request *rq, blk_qc_t *cookie) ret = q->mq_ops->queue_rq(hctx, &bd); if (ret == BLK_MQ_RQ_QUEUE_OK) { *cookie = new_cookie; - return 0; + return; } __blk_mq_requeue_request(rq); @@ -1272,10 +1275,11 @@ static int blk_mq_direct_issue_request(struct request *rq, blk_qc_t *cookie) *cookie = BLK_QC_T_NONE; rq->errors = -EIO; blk_mq_end_request(rq, rq->errors); - return 0; + return; } - return -1; +insert: + blk_mq_insert_request(rq, false, true, true); } /* @@ -1352,9 +1356,7 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio) blk_mq_put_ctx(data.ctx); if (!old_rq) goto done; - if (blk_mq_hctx_stopped(data.hctx) || - blk_mq_direct_issue_request(old_rq, &cookie) != 0) - blk_mq_insert_request(old_rq, false, true, true); + blk_mq_try_issue_directly(data.hctx, old_rq, &cookie); goto done; }
Move the "hctx stopped" test and the insert request calls into blk_mq_direct_issue_request(). Rename that function into blk_mq_try_issue_directly() to reflect its new semantics. Pass the hctx pointer to that function instead of looking it up a second time. These changes avoid that code has to be duplicated in the next patch. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.com> Cc: Sagi Grimberg <sagi@grimberg.me> Cc: Johannes Thumshirn <jthumshirn@suse.de> --- block/blk-mq.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-)