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| author | Ming Lei <ming.lei@redhat.com> | 2020-12-03 04:26:38 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-12-08 06:30:19 +0300 |
| commit | 7aa390ec2d9db0cd6677d95d0b8f307f9c086770 (patch) | |
| tree | 11bf35198ef08b60611da39cd7fef8dda4bd5181 /block | |
| parent | 88c9979334aa5ff8c814ddf578f3113ed6c5ce8e (diff) | |
| download | linux-7aa390ec2d9db0cd6677d95d0b8f307f9c086770.tar.xz | |
Revert "block: Fix a lockdep complaint triggered by request queue flushing"
This reverts commit b3c6a59975415bde29cfd76ff1ab008edbf614a9.
Now we can avoid nvme-loop lockdep warning of 'lockdep possible recursive locking'
by nvme-loop's lock class, no need to apply dynamically allocated lock class key,
so revert commit b3c6a5997541("block: Fix a lockdep complaint triggered by request
queue flushing").
This way fixes horrible SCSI probe delay issue on megaraid_sas, and it is reported
the whole probe may take more than half an hour.
Tested-by: Kashyap Desai <kashyap.desai@broadcom.com>
Reported-by: Qian Cai <cai@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Sumit Saxena <sumit.saxena@broadcom.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kashyap Desai <kashyap.desai@broadcom.com>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-flush.c | 5 | ||||
| -rw-r--r-- | block/blk.h | 1 |
2 files changed, 0 insertions, 6 deletions
diff --git a/block/blk-flush.c b/block/blk-flush.c index bf51588762d8..996d5d03dade 100644 --- a/block/blk-flush.c +++ b/block/blk-flush.c @@ -69,7 +69,6 @@ #include <linux/blkdev.h> #include <linux/gfp.h> #include <linux/blk-mq.h> -#include <linux/lockdep.h> #include "blk.h" #include "blk-mq.h" @@ -469,9 +468,6 @@ struct blk_flush_queue *blk_alloc_flush_queue(int node, int cmd_size, INIT_LIST_HEAD(&fq->flush_queue[1]); INIT_LIST_HEAD(&fq->flush_data_in_flight); - lockdep_register_key(&fq->key); - lockdep_set_class(&fq->mq_flush_lock, &fq->key); - return fq; fail_rq: @@ -486,7 +482,6 @@ void blk_free_flush_queue(struct blk_flush_queue *fq) if (!fq) return; - lockdep_unregister_key(&fq->key); kfree(fq->flush_rq); kfree(fq); } diff --git a/block/blk.h b/block/blk.h index 98f0b1ae2641..d23d018fd2cd 100644 --- a/block/blk.h +++ b/block/blk.h @@ -25,7 +25,6 @@ struct blk_flush_queue { struct list_head flush_data_in_flight; struct request *flush_rq; - struct lock_class_key key; spinlock_t mq_flush_lock; }; |