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| author | Ming Lei <ming.lei@redhat.com> | 2025-05-05 17:17:47 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2025-05-06 16:43:42 +0300 |
| commit | b126d9d7475e3a35155f31418e54d9221b971ca1 (patch) | |
| tree | 4cbf109753f7b040777858efdf1418969ddf7aa0 /tools/perf/scripts/python/bin/stackcollapse-record | |
| parent | 98e68f67020ce30e1a4d8e2d05d85a453738dfb8 (diff) | |
| download | linux-b126d9d7475e3a35155f31418e54d9221b971ca1.tar.xz | |
block: don't allow to switch elevator if updating nr_hw_queues is in-progress
Elevator switch code is another `nr_hw_queue` reader in non-fast-IO code
path, so it can't be done if updating `nr_hw_queues` is in-progress.
Take same approach with not allowing add/del disk when updating
nr_hw_queues is in-progress, by grabbing read lock of
set->update_nr_hwq_sema.
Reviewed-by: Hannes Reinecke <hare@suse.de>
Link: https://lore.kernel.org/linux-block/aAWv3NPtNIKKvJZc@fedora/ [1]
Reported-by: Shinichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Closes: https://lore.kernel.org/linux-block/mz4t4tlwiqjijw3zvqnjb7ovvvaegkqganegmmlc567tt5xj67@xal5ro544cnc/
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Nilay Shroff <nilay@linux.ibm.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20250505141805.2751237-10-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/perf/scripts/python/bin/stackcollapse-record')
0 files changed, 0 insertions, 0 deletions