From: "Michal Suchánek" <msuchanek@suse.de>
To: Paul Menzel <pmenzel@molgen.mpg.de>
Cc: linuxppc-dev@lists.ozlabs.org
Subject: Re: No Linux logs when doing `ppc64_cpu --smt=off/8`
Date: Mon, 14 Feb 2022 10:43:27 +0100 [thread overview]
Message-ID: <20220214094327.GL3113@kunlun.suse.cz> (raw)
In-Reply-To: <d141d8c3-5c72-02ab-6b31-c32cd02f8291@molgen.mpg.de>
Hello,
On Mon, Feb 14, 2022 at 07:08:07AM +0100, Paul Menzel wrote:
> Dear PPC folks,
>
>
> On the POWER8 server IBM S822LC running `ppc64_cpu --smt=off` or `ppc64_cpu
> --smt=8`, Linux 5.17-rc4 does not log anything. I would have expected a
> message about the change in number of processing units.
IIRC it was considered too noisy for systems with many CPUs and the
message was dropped. You can always check the resulting state with
ppc64_cpu or examining sysfs.
Thanks
Michal
next prev parent reply other threads:[~2022-02-14 9:44 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-14 6:08 No Linux logs when doing `ppc64_cpu --smt=off/8` Paul Menzel
2022-02-14 9:43 ` Michal Suchánek [this message]
2022-02-14 12:33 ` Paul Menzel
2022-02-14 13:56 ` Michal Suchánek
2022-02-17 1:07 ` Michael Ellerman
2022-02-17 7:10 ` Joel Stanley
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