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authoryangerkun2020-09-05 19:25:56 +0800
committerJens Axboe2020-09-29 08:10:17 -0600
commit632bfb6323799c087fcb4108dfe59518609667a7 (patch)
tree82a008b131427f22482b359a62434ebc77f8421d /include/net
parent3aab91774bbd8e571cfaddaf839aafd07718333c (diff)
blk-mq: call commit_rqs while list empty but error happen
Blk-mq should call commit_rqs once 'bd.last != true' and no more request will come(so virtscsi can kick the virtqueue, e.g.). We already do that in 'blk_mq_dispatch_rq_list/blk_mq_try_issue_list_directly' while list not empty and 'queued > 0'. However, we can seen the same scene once the last request in list call queue_rq and return error like BLK_STS_IOERR which will not requeue the request, and lead that list empty but need call commit_rqs too(Or the request for virtscsi will stay timeout until other request kick virtqueue). We found this problem by do fsstress test with offline/online virtscsi device repeat quickly. Fixes: d666ba98f849 ("blk-mq: add mq_ops->commit_rqs()") Reported-by: zhangyi (F) <yi.zhang@huawei.com> Signed-off-by: yangerkun <yangerkun@huawei.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/net')
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