openkylin
/
platform_kernel-5.15
mirror of https://gitee.com/openkylin/platform_kernel-5.15.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

Revert "block: Fix a lockdep complaint triggered by request queue flushing" 

This reverts commit b3c6a59975.

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>
This commit is contained in:
Ming Lei 2020-12-03 09:26:38 +08:00 committed by Jens Axboe
parent 88c9979334
commit 7aa390ec2d
2 changed files with 0 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
block/blk-flush.c
View File

@ -69,7 +69,6 @@
#include <linux/blkdev.h> #include <linux/blkdev.h>
#include <linux/gfp.h> #include <linux/gfp.h>
#include <linux/blk-mq.h> #include <linux/blk-mq.h>
#include <linux/lockdep.h>
#include "blk.h" #include "blk.h"
#include "blk-mq.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_queue[1]);
INIT_LIST_HEAD(&fq->flush_data_in_flight); INIT_LIST_HEAD(&fq->flush_data_in_flight);
lockdep_register_key(&fq->key);
lockdep_set_class(&fq->mq_flush_lock, &fq->key);
return fq; return fq;
fail_rq: fail_rq:
@ -486,7 +482,6 @@ void blk_free_flush_queue(struct blk_flush_queue *fq)
if (!fq) if (!fq)
return; return;
lockdep_unregister_key(&fq->key);
kfree(fq->flush_rq); kfree(fq->flush_rq);
kfree(fq); kfree(fq);
} }

1
block/blk.h
View File

@ -25,7 +25,6 @@ struct blk_flush_queue {
struct list_head flush_data_in_flight; struct list_head flush_data_in_flight;
struct request *flush_rq; struct request *flush_rq;
struct lock_class_key key;
spinlock_t mq_flush_lock; spinlock_t mq_flush_lock;
}; };