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| author | Chris Leech <cleech@redhat.com> | 2023-03-10 09:09:13 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-03-14 19:20:55 -0600 |
| commit | 00e885efcfbb8712d3e1bfc1ae30639c15ca1d3b (patch) | |
| tree | 92eb3e277ed07c27d06e2d06b9b61523935cb87d /tools/perf/scripts/python/exported-sql-viewer.py | |
| parent | 9b0cb770f5d7b1ff40bea7ca385438ee94570eec (diff) | |
blk-mq: fix "bad unlock balance detected" on q->srcu in __blk_mq_run_dispatch_ops
The 'q' parameter of the macro __blk_mq_run_dispatch_ops may not be one
local variable, such as, it is rq->q, then request queue pointed by
this variable could be changed to another queue in case of
BLK_MQ_F_TAG_QUEUE_SHARED after 'dispatch_ops' returns, then
'bad unlock balance' is triggered.
Fixes the issue by adding one local variable for doing srcu lock/unlock.
Fixes: 2a904d00855f ("blk-mq: remove hctx_lock and hctx_unlock")
Cc: Marco Patalano <mpatalan@redhat.com>
Signed-off-by: Chris Leech <cleech@redhat.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20230310010913.1014789-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
0 files changed, 0 insertions, 0 deletions