linux-kernel - Re: [PATCH v2 0/7] vma count: fixes, test and improvements

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Message-ID: <e85d0b14-28dd-418f-872e-57c0127ad572@lucifer.local>
Date: Wed, 17 Sep 2025 06:36:34 +0100
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Kalesh Singh <kaleshsingh@...gle.com>, minchan@...nel.org,
        david@...hat.com, Liam.Howlett@...cle.com, rppt@...nel.org,
        pfalcato@...e.de, kernel-team@...roid.com, android-mm@...gle.com,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>,
        Kees Cook <kees@...nel.org>, Vlastimil Babka <vbabka@...e.cz>,
        Suren Baghdasaryan <surenb@...gle.com>, Michal Hocko <mhocko@...e.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Ingo Molnar <mingo@...hat.com>, Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        Valentin Schneider <vschneid@...hat.com>, Jann Horn <jannh@...gle.com>,
        Shuah Khan <shuah@...nel.org>, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        linux-trace-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v2 0/7] vma count: fixes, test and improvements

On Tue, Sep 16, 2025 at 07:16:45PM -0700, Andrew Morton wrote:
> On Tue, 16 Sep 2025 11:12:03 +0100 Lorenzo Stoakes <lorenzo.stoakes@...cle.com> wrote:
>
> > On Mon, Sep 15, 2025 at 03:34:01PM -0700, Andrew Morton wrote:
> > > Anyhow, this -rc cycle has been quite the firehose in MM and I'm
> > > feeling a need to slow things down for additional stabilization and so
> > > people hopefully get additional bandwidth to digest the material we've
> > > added this far.  So I think I'll just cherrypick [1/7] for now.  A
> > > great flood of positive review activity would probably make me revisit
> > > that ;)
> > >
> >
> > Kalesh - I do intend to look at this series when I have a chance. My review
> > workload has been insane so it's hard to keep up at the moment.
> >
> > Andrew - This cycle has been crazy, speaking from point of view of somebody
> > doing a lot of review, it's been very very exhausting from this side too,
> > and this kind of work can feel a little... thankless... sometimes :)
>
> I hear you.  I'm shedding most everything now, to give us a couple of
> weeks to digest.

Thanks, much appreciated! :)

>
> > I feel like we maybe need a way to ask people to slow down, sometimes at
> > least.
>
> Yup, I'm sending submitters private emails explaining the situation.

And again, much appreciated :)

>
> Maybe they should be public emails, I find it a hard call.

Yeah it can be hard to get that balance right. Maybe public is better when
we're deeper in the rc and there's a general load problem?

>
> > Perhaps being less accepting of patches during merge window is one aspect,
> > as the merge window leading up to this cycle was almost the same review
> > load as when the cycle started.
>
> I'm having trouble understanding what you said here?

Sorry, what I mean to say is that in mm we're pretty open to taking stuff in the
merge window, esp. now we have mm-new.

And last merge window my review load felt similar to during a cycle, which
was kind of crazy.

So I wonder if we should be less accommodating and simply say 'sorry it's
the merge window, no submissions accepted'?

Of course I'm being a bit selfish here as I'm on holiday in the next merge
window and hope forlornly to reduce the mail I come back to :P

>
> > Anyway, TL;DR: I think we need to be mindful of reviewer sanity as a factor
> > in all this too :)
> >
> > (I am spekaing at Kernel Recipes then going on a very-badly-needed 2.5 week
> > vacataion afterwards over the merge window so I hope to stave off burnout
> > that way. Be good if I could keep mails upon return to 3 digits, but I have
> > my doubts :P)
>
> I'd blow that in three days ;)

Haha yeah I bet :)

Cheers, Lorenzo