linux-kernel - Re: [PATCH v4] sched/numa, mm: do not try to migrate memory to memoryless nodes

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Message-Id: <20240219190520.b5e373273ec743aacbad263b@linux-foundation.org>
Date: Mon, 19 Feb 2024 19:05:20 -0800
From: Andrew Morton <akpm@...ux-foundation.org>
To: Byungchul Park <byungchul@...com>
Cc: "Huang, Ying" <ying.huang@...el.com>, mingo@...hat.com,
 peterz@...radead.org, juri.lelli@...hat.com, vincent.guittot@...aro.org,
 dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com,
 mgorman@...e.de, bristot@...hat.com, vschneid@...hat.com,
 linux-kernel@...r.kernel.org, linux-mm@...ck.org, kernel_team@...ynix.com
Subject: Re: [PATCH v4] sched/numa, mm: do not try to migrate memory to
 memoryless nodes

On Tue, 20 Feb 2024 10:53:43 +0900 Byungchul Park <byungchul@...com> wrote:

> > > IIUC, you will use patch as fix to the issue in
> > > 
> > > https://lore.kernel.org/lkml/20240216111502.79759-1-byungchul@sk.com/
> > > 
> > > If so, we need the Fixes: tag to make it land in -stable properly.
> > 
> > Yes, this changelog is missing rather a lot of important information.
> 
> This is not the root cause fix any more but just optimization.

It would have been helpful to have told us this in the changelog :(

> That's
> why I didn't add Fixes: tag and cc stable@...r.kernel.org in here.
> 
> Instead, I added Fixes: tag and cc'ed stable@...r.kernel.org in the real
> fix patch. check the following link please:
> 
> https://lore.kernel.org/lkml/20240216111502.79759-1-byungchul@sk.com/

But doesn't this patch "sched/numa, mm: do not try to migrate memory to
memoryless nodes" also fix the bug?  Do we truly need both?