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| author | Nilay Shroff <[email protected]> | 2025-01-28 14:34:14 +0000 |
|---|---|---|
| committer | Jens Axboe <[email protected]> | 2025-01-29 14:16:47 +0000 |
| commit | 14ef49657ff3b7156952b2eadcf2e5bafd735795 (patch) | |
| tree | aa1ede3f316d5037e030900684af1372c398310a /net/unix/af_unix.c | |
| parent | block: get rid of request queue ->sysfs_dir_lock (diff) | |
| download | kernel-14ef49657ff3b7156952b2eadcf2e5bafd735795.tar.gz kernel-14ef49657ff3b7156952b2eadcf2e5bafd735795.zip | |
block: fix nr_hw_queue update racing with disk addition/removal
The nr_hw_queue update could potentially race with disk addtion/removal
while registering/unregistering hctx sysfs files. The __blk_mq_update_
nr_hw_queues() runs with q->tag_list_lock held and so to avoid it racing
with disk addition/removal we should acquire q->tag_list_lock while
registering/unregistering hctx sysfs files.
With this patch, blk_mq_sysfs_register() (called during disk addition)
and blk_mq_sysfs_unregister() (called during disk removal) now runs
with q->tag_list_lock held so that it avoids racing with __blk_mq_update
_nr_hw_queues().
Signed-off-by: Nilay Shroff <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Reviewed-by: Hannes Reinecke <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions