From: Dave Hansen <dave.hansen@intel.com>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
x86 Maintainers <x86@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
Linux PM <linux-pm@vger.kernel.org>, Len Brown <lenb@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@suse.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
Artem Bityutskiy <artem.bityutskiy@linux.intel.com>,
"Gautham R. Shenoy" <gautham.shenoy@amd.com>,
Ingo Molnar <mingo@redhat.com>,
Todd Brandt <todd.e.brandt@linux.intel.com>
Subject: Re: [PATCH v2] Revert "x86/smp: Eliminate mwait_play_dead_cpuid_hint()"
Date: Thu, 29 May 2025 07:25:43 -0700 [thread overview]
Message-ID: <a72c38b2-c52f-446a-bf0f-2bae7d6021f8@intel.com> (raw)
In-Reply-To: <12674167.O9o76ZdvQC@rjwysocki.net>
On 5/29/25 06:40, Rafael J. Wysocki wrote:
> This issue is hard to debug and potentially dangerous, so it needs to
> be addressed as soon as possible in a way that will work for 6.15.y,
> hence the revert.
Ugh.
I don't like the idea of reintroducing known buggy code. But the revert
does seem like the lesser of the two evils.
Seems like we should revert this for the time being and then try to fix
it properly again.
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
next prev parent reply other threads:[~2025-05-29 14:25 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-28 12:53 [PATCH v1 0/2] x86/smp: Fix power regression introduced by commit 96040f7273e2 Rafael J. Wysocki
2025-05-28 12:53 ` [PATCH v1 1/2] Revert "x86/smp: Eliminate mwait_play_dead_cpuid_hint()" Rafael J. Wysocki
2025-05-28 12:54 ` [PATCH v1 2/2] x86/smp: Prefer cpuidle_play_dead() to mwait_play_dead_cpuid_hint() Rafael J. Wysocki
2025-05-28 13:17 ` [PATCH v1 0/2] x86/smp: Fix power regression introduced by commit 96040f7273e2 Peter Zijlstra
2025-05-28 13:20 ` Rafael J. Wysocki
2025-05-28 13:38 ` Peter Zijlstra
2025-05-28 14:25 ` Rafael J. Wysocki
2025-05-28 16:05 ` Peter Zijlstra
2025-05-28 17:09 ` Rafael J. Wysocki
2025-05-29 8:53 ` Peter Zijlstra
2025-05-29 9:38 ` Rafael J. Wysocki
2025-05-30 8:07 ` Peter Zijlstra
2025-05-30 9:18 ` Rafael J. Wysocki
2025-05-30 9:27 ` Rafael J. Wysocki
2025-05-30 16:59 ` Rafael J. Wysocki
2025-05-30 17:55 ` Rafael J. Wysocki
2025-05-29 13:40 ` [PATCH v2] Revert "x86/smp: Eliminate mwait_play_dead_cpuid_hint()" Rafael J. Wysocki
2025-05-29 14:25 ` Dave Hansen [this message]
2025-05-29 15:39 ` Rafael J. Wysocki
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=a72c38b2-c52f-446a-bf0f-2bae7d6021f8@intel.com \
--to=dave.hansen@intel.com \
--cc=artem.bityutskiy@linux.intel.com \
--cc=bp@suse.de \
--cc=dave.hansen@linux.intel.com \
--cc=gautham.shenoy@amd.com \
--cc=lenb@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=peterz@infradead.org \
--cc=rjw@rjwysocki.net \
--cc=tglx@linutronix.de \
--cc=todd.e.brandt@linux.intel.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox