linux-kernel - Re: [mm-unstable v3 PATCH 2/3] mm: khugepaged: allow page allocation fallback to eligible nodes

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Message-ID: <CAHbLzkp2ChkMEFDscOMGRtGGYTYGO1xsCTPDZDOsTFc0qfjvBQ@mail.gmail.com>
Date:   Tue, 8 Nov 2022 11:33:30 -0800
From:   Yang Shi <shy828301@...il.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     zokeefe@...gle.com, mhocko@...e.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        syzbot+0044b22d177870ee974f@...kaller.appspotmail.com,
        "Zach O'Keefe" <zokeefe@...gel.com>
Subject: Re: [mm-unstable v3 PATCH 2/3] mm: khugepaged: allow page allocation
 fallback to eligible nodes

On Tue, Nov 8, 2022 at 11:20 AM Andrew Morton <akpm@...ux-foundation.org> wrote:
>
> On Tue,  8 Nov 2022 10:43:56 -0800 Yang Shi <shy828301@...il.com> wrote:
>
> > Syzbot reported the below splat:
> >
> > ...
> >
>
> "mm: don't warn if the node is offlined" remains in
> mm-hotfixes-unstable, so I'll just drop it.

Yes, please.

>
> >
> > Reported-by: syzbot+0044b22d177870ee974f@...kaller.appspotmail.com
> > Suggested-by: Zach O'Keefe <zokeefe@...gle.com>
> > Suggested-by: Michal Hocko <mhocko@...e.com>
> > Reviewed-by: Zach O'Keefe <zokeefe@...gel.com>
> > Acked-by: Michal Hocko <mhocko@...e.com>
> > Signed-off-by: Yang Shi <shy828301@...il.com>
>
> I should add cc:stable, yes?

This problem should just happen with MADV_COLLAPSE, which is merged
for 6.1, so we should not cc to stable.

>
> Are we able to identify a Fixes: target?

Please use this target: 7d8faaf15545 mm/madvise: introduce
MADV_COLLAPSE sync hugepage collapse

>
>