linux-kernel - Re: stalling IO regression in linux 5.12

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Date:   Wed, 10 Aug 2022 14:42:40 -0400
From:   "Chris Murphy" <lists@...orremedies.com>
To:     "Josef Bacik" <josef@...icpanda.com>
Cc:     "Btrfs BTRFS" <linux-btrfs@...r.kernel.org>,
        Linux-RAID <linux-raid@...r.kernel.org>,
        linux-block@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: stalling IO regression in linux 5.12



On Wed, Aug 10, 2022, at 2:33 PM, Chris Murphy wrote:
> On Wed, Aug 10, 2022, at 1:48 PM, Josef Bacik wrote:
>
>> To help narrow this down can you disable any IO controller you've got enabled
>> and see if you can reproduce?  If you can sysrq+w is super helpful as it'll
>> point us in the next direction to look.  Thanks,
>
> I'm not following, sorry. I can boot with 
> systemd.unified_cgroup_hierarchy=0 to make sure it's all off, but we're 
> not using an IO cgroup controllers specifically as far as I'm aware.

OK yeah that won't work because the workload requires cgroup2 or it won't run.


-- 
Chris Murphy