linux-kernel - Re: [PATCH] writeback, cgroup: remove wb from offline list before releasing refcnt

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Message-ID: <b5d25fba13479cb3aa03f1a054873c122edf7310.camel@redhat.com>
Date:   Fri, 23 Jul 2021 12:15:08 -0700
From:   Adam Williamson <awilliam@...hat.com>
To:     Roman Gushchin <guro@...com>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH] writeback, cgroup: remove wb from offline list before
 releasing refcnt

On Fri, 2021-07-23 at 12:13 -0700, Roman Gushchin wrote:
> On Fri, Jul 23, 2021 at 11:33:43AM -0700, Adam Williamson wrote:
> > Hi folks! I'm not subscribed to the list and am trying to send this
> > using git-send-email, apologies for any weirdness related to that.
> > 
> > Just wanted to confirm the issue that this patch attempts to address,
> > and ask if it can be reviewed/moved along. I look after Fedora's
> > openQA automated test instance, and in tests of recent Fedora Rawhide
> > composes, we're seeing at least one failure per compose that's caused
> > by this crash (it usually prevents the system shutting down or
> > rebooting correctly in a test which requires that to happen).
> > 
> > I can't actually confirm the fix as I can't really easily change our
> > tests to run on a non-official kernel build, and our kernel maintainer
> > (reasonably) says he won't backport the patch until it's at least got
> > some review. But I'm definitely seeing the problem!
> > 
> > Thanks folks.
> > -- 
> > Adam Williamson
> > Fedora QA
> > IRC: adamw | Twitter: adamw_ha
> > https://www.happyassassin.net 
> > 
> 
> Hello, Adam!
> 
> The patch was picked up by Andrew Morton and will be soon merged into the Linus's tree.
> Currently you can find it in the "next" tree (can't provide a hash because it's not stable
> there).
> 
> Please, note that there it another fix called "writeback, cgroup: do not reparent dax inodes",
> which you likely want to backport too.
> 
> Both fixes got some testing and reviews.

Hi Roman! Aha, great, thanks for the info. I didn't see any follow-up
on LKML so I figured it was in limbo. I'll let our kernel maintainer
know. Thanks again!
-- 
Adam Williamson
Fedora QA
IRC: adamw | Twitter: adamw_ha
https://www.happyassassin.net