linux-kernel - Re: [PATCH mm] mm/page_alloc: Avoid second trylock of zone->lock

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Message-ID: <CAADnVQ+26Lqt1H8Q5dkX_NDutuuWa+RO-91rmRNfcPUwtsazKg@mail.gmail.com>
Date: Mon, 31 Mar 2025 09:59:26 -0700
From: Alexei Starovoitov <alexei.starovoitov@...il.com>
To: Vlastimil Babka <vbabka@...e.cz>
Cc: Michal Hocko <mhocko@...e.com>, Linus Torvalds <torvalds@...ux-foundation.org>, 
	bpf <bpf@...r.kernel.org>, Daniel Borkmann <daniel@...earbox.net>, 
	Andrii Nakryiko <andrii@...nel.org>, Martin KaFai Lau <martin.lau@...nel.org>, 
	Andrew Morton <akpm@...ux-foundation.org>, Peter Zijlstra <peterz@...radead.org>, 
	Sebastian Sewior <bigeasy@...utronix.de>, Steven Rostedt <rostedt@...dmis.org>, 
	Shakeel Butt <shakeel.butt@...ux.dev>, linux-mm <linux-mm@...ck.org>, 
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH mm] mm/page_alloc: Avoid second trylock of zone->lock

On Mon, Mar 31, 2025 at 5:17 AM Vlastimil Babka <vbabka@...e.cz> wrote:
>
> >> Fixes: 97769a53f117 ("mm, bpf: Introduce try_alloc_pages() for opportunistic page allocation")
> >> Signed-off-by: Alexei Starovoitov <ast@...nel.org>
> >
> > Makes sense. Fixes tag is probably over reaching but whatever.
>
> It's fixing 6.15-rc1 code so no possible stable implications anyway.

All true. I added the Fixes tag only because if I didn't then
somebody would question why the tag is missing :)

I often look at "Fixes:" as "Strongly-related-to:".
We might backport these patches to older kernels way before 6.15
is released, so having a documented way to strongly connect patches
is a good thing.

Thanks for the reviews everyone.