linux-kernel - Re: stalling IO regression since linux 5.12, through 5.18

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Message-Id: <63ca1776-764e-482c-a4f4-0f3616be83d5@www.fastmail.com>
Date:   Wed, 17 Aug 2022 10:37:35 -0400
From:   "Chris Murphy" <lists@...orremedies.com>
To:     "Jan Kara" <jack@...e.cz>,
        Holger Hoffstätte <holger@...lied-asynchrony.com>
Cc:     "Nikolay Borisov" <nborisov@...e.com>,
        "Jens Axboe" <axboe@...nel.dk>,
        "Paolo Valente" <paolo.valente@...aro.org>,
        Linux-RAID <linux-raid@...r.kernel.org>,
        linux-block <linux-block@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        "Josef Bacik" <josef@...icpanda.com>
Subject: Re: stalling IO regression since linux 5.12, through 5.18



On Wed, Aug 17, 2022, at 7:49 AM, Jan Kara wrote:

> Another thing worth trying is to compile the kernel without
> CONFIG_BFQ_GROUP_IOSCHED. That will essentially disable cgroup support in
> BFQ so we will see whether the problem may be cgroup related or not.

Does boot param cgroup.disable=io affect it? Because the problem still happens with that parameter. Otherwise I can build a kernel with it disabled.

-- 
Chris Murphy