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| author | Nilay Shroff <nilay@linux.ibm.com> | 2025-03-13 14:51:52 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2025-03-13 16:23:43 +0300 |
| commit | 0e94ed33681424a6dce65c62837e08e4c7aa09ac (patch) | |
| tree | cb95082667f464c5bd14eed5af97b99d0c83e7e1 /tools/perf/scripts/python/stackcollapse.py | |
| parent | 78800f5997d8ae0f20d4aced66a524f0f2fc4c7f (diff) | |
| download | linux-0e94ed33681424a6dce65c62837e08e4c7aa09ac.tar.xz | |
block: protect debugfs attribute method hctx_busy_show
The hctx_busy_show method in debugfs is currently unprotected. This
method iterates over all started requests in a tagset and prints them.
However, the tags can be updated concurrently via the sysfs attributes
'nr_requests' or 'scheduler' (elevator switch), leading to potential
race conditions.
Since sysfs attributes 'nr_requests' and 'scheduler' are already
protected using q->elevator_lock, extend this protection to the debugfs
'busy' attribute as well to ensure consistency.
Signed-off-by: Nilay Shroff <nilay@linux.ibm.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20250313115235.3707600-4-nilay@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions