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| author | Chengming Zhou <zhouchengming@bytedance.com> | 2023-08-21 17:56:00 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-08-22 08:58:05 -0600 |
| commit | e1dd7bc93029024af5688253b0c05181d6e01f8e (patch) | |
| tree | af06f25bebaedcb4b34985f4cb4da87c88baa240 /samples/kdb | |
| parent | 851e06297f20bbd85c93bbf09469f2150d1db218 (diff) | |
| download | linux-e1dd7bc93029024af5688253b0c05181d6e01f8e.tar.gz linux-e1dd7bc93029024af5688253b0c05181d6e01f8e.tar.bz2 linux-e1dd7bc93029024af5688253b0c05181d6e01f8e.zip | |
blk-mq: fix tags leak when shrink nr_hw_queues
Although we don't need to realloc set->tags[] when shrink nr_hw_queues,
we need to free them. Or these tags will be leaked.
How to reproduce:
1. mount -t configfs configfs /mnt
2. modprobe null_blk nr_devices=0 submit_queues=8
3. mkdir /mnt/nullb/nullb0
4. echo 1 > /mnt/nullb/nullb0/power
5. echo 4 > /mnt/nullb/nullb0/submit_queues
6. rmdir /mnt/nullb/nullb0
In step 4, will alloc 9 tags (8 submit queues and 1 poll queue), then
in step 5, new_nr_hw_queues = 5 (4 submit queues and 1 poll queue).
At last in step 6, only these 5 tags are freed, the other 4 tags leaked.
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20230821095602.70742-1-chengming.zhou@linux.dev
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'samples/kdb')
0 files changed, 0 insertions, 0 deletions