linux-kernel - Re: [PATCH mips-fixes] MIPS: smp: fill in sibling and core maps earlier

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Message-ID: <5324be35-5c49-31c1-3f9a-267a5dae8c84@amsat.org>
Date:   Tue, 15 Feb 2022 14:49:00 +0000
From:   Alexander Lobakin <alobakin@...me>
To:     Philippe Mathieu-Daudé <f4bug@...at.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc:     Alexander Lobakin <alobakin@...me>,
        Valentin Schneider <valentin.schneider@....com>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH mips-fixes] MIPS: smp: fill in sibling and core maps earlier

From: Philippe Mathieu-Daudé <f4bug@...at.org>
Date: Mon, 14 Feb 2022 20:00:12 +0100

> On 12/2/22 23:21, Alexander Lobakin wrote:
> > After enabling CONFIG_SCHED_CORE (landed during 5.14 cycle),
> > 2-core 2-thread-per-core interAptiv (CPS-driven) started emitting
> > the following:
> >

--- 8< ---

> >
> > [    0.048433] CPU: 1, smt_mask: 0-1
> >
> > [0] https://git.kernel.org/pub/scm/linux/kernel/git/mips/linux.git/commit/?id=76ce7cfe35ef
>
> Isn't it worth Cc'ing stable@...r.kernel.org here?

Probably. It doesn't have any Fixes tag (this is a fix, but the bug
is caused not by a particular commit, rather by a combination of
changes and code flows from the past), but it still can be
backported, right.

Thomas, should I queue a v2 with this tag added?

Cc: stable@...r.kernel.org # 5.14+

Or it can be picked up automatically?

>
> > Signed-off-by: Alexander Lobakin <alobakin@...me>
> > ---
> >   arch/mips/kernel/smp.c | 6 +++---
> >   1 file changed, 3 insertions(+), 3 deletions(-)
>
> Reviewed-by: Philippe Mathieu-Daudé <f4bug@...at.org>

Thanks!

Al