linux-kernel - Re: [PATCH 5.15 00/91] 5.15.108-rc1 review

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Date:   Wed, 19 Apr 2023 09:09:23 -0600
From:   Tom Saeger <tom.saeger@...cle.com>
To:     Yu Zhao <yuzhao@...gle.com>
Cc:     Bagas Sanjaya <bagasdotme@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>,
        Naresh Kamboju <naresh.kamboju@...aro.org>,
        Waiman Long <longman@...hat.com>, stable@...r.kernel.org,
        patches@...ts.linux.dev, linux-kernel@...r.kernel.org,
        torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
        linux@...ck-us.net, shuah@...nel.org, patches@...nelci.org,
        lkft-triage@...ts.linaro.org, pavel@...x.de, jonathanh@...dia.com,
        f.fainelli@...il.com, sudipm.mukherjee@...il.com,
        srw@...dewatkins.net, rwarsow@....de, Tejun Heo <tj@...nel.org>,
        Michal Koutný <mkoutny@...e.com>,
        Daniel Díaz <daniel.diaz@...aro.org>,
        Anders Roxell <anders.roxell@...aro.org>,
        Darren Kenny <darren.kenny@...cle.com>,
        Vegard Nossum <vegard.nossum@...cle.com>
Subject: Re: [PATCH 5.15 00/91] 5.15.108-rc1 review

On Tue, Apr 18, 2023 at 10:56:22PM -0600, Yu Zhao wrote:
> On Tue, Apr 18, 2023 at 10:18 PM Bagas Sanjaya <bagasdotme@...il.com> wrote:
> >
> > On Tue, Apr 18, 2023 at 10:51:05AM -0600, Tom Saeger wrote:
> > > > Tom Saeger identified that the below commit moves it out of ifdef.
> > > >
> > > > commit 354ed597442952fb680c9cafc7e4eb8a76f9514c
> > > > Author: Yu Zhao <yuzhao@...gle.com>
> > > > Date:   Sun Sep 18 02:00:07 2022 -0600
> > > >
> > > >     mm: multi-gen LRU: kill switch
> > > >
> > > FWIW - partially backporting (location of cgroup_mutex extern) from:
> > > 354ed5974429 ("mm: multi-gen LRU: kill switch")
> > >
> > > fixes x86_64 build for me.
> > >
> > > Regards,
> > >
> > > --Tom
> > >
> > > diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
> 
> ...
> 
> > Yu, would you like to provide formal backport?

Nah - an easier fix was suggested by Waiman (remove the lockdep_assert_held line) and confirmed here:

https://lore.kernel.org/stable/20230418192807.n3hggjak25tnat7i@oracle.com/

> 
> Are you suggesting backporting the entire MGLRU patchset (>30 patches)?
> 
> I do have the backport ready for 5.15 and multiple distros have taken
> it.

However, I am interested in testing 5.15 backport of MGLRU.
Where might I find that?

--Tom