From: "Holger Hoffstätte" <holger@applied-asynchrony.com>
To: Chris Murphy <lists@colorremedies.com>,
Nikolay Borisov <nborisov@suse.com>, Jens Axboe <axboe@kernel.dk>,
Jan Kara <jack@suse.cz>, Paolo Valente <paolo.valente@linaro.org>
Cc: Linux-RAID <linux-raid@vger.kernel.org>,
linux-block <linux-block@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Josef Bacik <josef@toxicpanda.com>,
linux-block <linux-block@vger.kernel.org>
Subject: Re: stalling IO regression since linux 5.12, through 5.18
Date: Wed, 17 Aug 2022 11:52:54 +0200 [thread overview]
Message-ID: <7c830487-95a6-b008-920b-8bc4a318f10a@applied-asynchrony.com> (raw)
In-Reply-To: <2b8a38fa-f15f-45e8-8caa-61c5f8cd52de@www.fastmail.com>
On 2022-08-16 17:34, Chris Murphy wrote:
>
> On Tue, Aug 16, 2022, at 11:25 AM, Nikolay Borisov wrote:
>> How about changing the scheduler either mq-deadline or noop, just
>> to see if this is also reproducible with a different scheduler. I
>> guess noop would imply the blk cgroup controller is going to be
>> disabled
>
> I already reported on that: always happens with bfq within an hour or
> less. Doesn't happen with mq-deadline for ~25+ hours. Does happen
> with bfq with the above patches removed. Does happen with
> cgroup.disabled=io set.
>
> Sounds to me like it's something bfq depends on and is somehow
> becoming perturbed in a way that mq-deadline does not, and has
> changed between 5.11 and 5.12. I have no idea what's under bfq that
> matches this description.
Chris, just a shot in the dark but can you try the patch from
https://lore.kernel.org/linux-block/20220803121504.212071-1-yukuai1@huaweicloud.com/
on top of something more recent than 5.12? Ideally 5.19 where it applies
cleanly.
No guarantees, I just remembered this patch and your problem sounds like
a lost wakeup. Maybe BFQ just drives the sbitmap in a way that triggers the
symptom.
-h
next prev parent reply other threads:[~2022-08-17 9:53 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-10 16:35 stalling IO regression in linux 5.12 Chris Murphy
2022-08-10 17:48 ` Josef Bacik
2022-08-10 18:33 ` Chris Murphy
2022-08-10 18:42 ` Chris Murphy
2022-08-10 19:31 ` Josef Bacik
2022-08-10 19:34 ` Chris Murphy
2022-08-12 16:05 ` stalling IO regression since linux 5.12, through 5.18 Chris Murphy
2022-08-12 17:59 ` Josef Bacik
2022-08-12 18:02 ` Jens Axboe
2022-08-14 20:28 ` Chris Murphy
2022-08-16 14:22 ` Chris Murphy
2022-08-16 15:25 ` Nikolay Borisov
2022-08-16 15:34 ` Chris Murphy
2022-08-17 9:52 ` Holger Hoffstätte [this message]
2022-08-17 11:49 ` Jan Kara
2022-08-17 14:37 ` Chris Murphy
2022-08-17 15:09 ` Chris Murphy
2022-08-17 16:30 ` Jan Kara
2022-08-17 16:47 ` Chris Murphy
2022-08-17 17:57 ` Chris Murphy
2022-08-17 18:15 ` Jan Kara
2022-08-17 18:18 ` Chris Murphy
2022-08-17 18:33 ` Jan Kara
2022-08-17 18:54 ` Chris Murphy
2022-08-17 19:23 ` Chris Murphy
2022-08-18 2:31 ` Chris Murphy
2022-08-17 18:21 ` Holger Hoffstätte
2022-08-17 11:57 ` Chris Murphy
2022-08-17 12:31 ` Holger Hoffstätte
2022-08-17 18:16 ` Chris Murphy
2022-08-17 18:38 ` Holger Hoffstätte
2022-08-17 12:06 ` Ming Lei
2022-08-17 14:34 ` Chris Murphy
2022-08-17 14:53 ` Ming Lei
2022-08-17 15:02 ` Chris Murphy
2022-08-17 15:34 ` Ming Lei
2022-08-17 16:34 ` Chris Murphy
2022-08-18 1:03 ` Ming Lei
2022-08-18 2:30 ` Chris Murphy
2022-08-18 3:24 ` Ming Lei
2022-08-18 4:12 ` Chris Murphy
2022-08-18 4:18 ` Chris Murphy
2022-08-18 4:27 ` Chris Murphy
2022-08-18 4:32 ` Chris Murphy
2022-08-18 5:15 ` Ming Lei
2022-08-18 18:52 ` Chris Murphy
2022-08-18 5:24 ` Ming Lei
2022-08-18 13:50 ` Chris Murphy
2022-08-18 15:10 ` Ming Lei
2022-08-19 19:20 ` Chris Murphy
2022-08-20 7:00 ` Ming Lei
2022-09-01 7:02 ` Yu Kuai
2022-09-01 8:03 ` Jan Kara
2022-09-01 8:19 ` Yu Kuai
2022-09-06 9:49 ` Paolo Valente
2022-09-02 16:53 ` Chris Murphy
2022-09-06 9:45 ` Paolo Valente
2022-08-15 11:25 ` stalling IO regression in linux 5.12 Thorsten Leemhuis
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