block: BFQ: Add several invariant checks

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If anything goes wrong with the counters that track the number of
requests, I/O locks up. Make such scenarios easier to debug by adding
invariant checks for the request counters. Additionally, check that
BFQ queues are empty before these are freed.

Cc: Jan Kara <jack@suse.cz>
Cc: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230516223853.1385255-1-bvanassche@acm.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Bart Van Assche 2023-05-16 15:38:53 -07:00 • committed by Jens Axboe

parent a036e698c2

commit 3e49c1e4a6

1 changed files with 9 additions and 0 deletions

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block/bfq-iosched.c

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