linux-kernel - Re: [PATCH block/for-5.19] blk-iolatency: Fix inflight count imbalances and IO hangs on offline

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Date:   Thu, 26 May 2022 11:43:25 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     tj@...nel.org
Cc:     linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
        bo.liu@...ux.alibaba.com, kernel-team@...com, josef@...icpanda.com
Subject: Re: [PATCH block/for-5.19] blk-iolatency: Fix inflight count imbalances and IO hangs on offline

On Fri, 13 May 2022 20:55:45 -1000, Tejun Heo wrote:
> iolatency needs to track the number of inflight IOs per cgroup. As this
> tracking can be expensive, it is disabled when no cgroup has iolatency
> configured for the device. To ensure that the inflight counters stay
> balanced, iolatency_set_limit() freezes the request_queue while manipulating
> the enabled counter, which ensures that no IO is in flight and thus all
> counters are zero.
> 
> [...]

Applied, thanks!

[1/1] blk-iolatency: Fix inflight count imbalances and IO hangs on offline
      commit: 8a177a36da6c54c98b8685d4f914cb3637d53c0d

Best regards,
-- 
Jens Axboe