From: "Roger Pau Monné" <roger.pau@citrix.com>
To: Jan Beulich <jbeulich@suse.com>
Cc: "xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
Andrew Cooper <andrew.cooper3@citrix.com>
Subject: Re: [PATCH for-4.22 v2 1/8] x86/mwait-idle: arrange for BSP MSR adjustments during S3 resume
Date: Thu, 14 May 2026 15:06:42 +0200 [thread overview]
Message-ID: <agXI4t4vuAQZSCZS@macbook.local> (raw)
In-Reply-To: <5c66cfb1-e234-4efa-9a01-88acb284e414@suse.com>
On Tue, May 12, 2026 at 05:35:33PM +0200, Jan Beulich wrote:
> mwait_idle_cpu_init() is only called for APs, yet MSR writes will
> typically need re-doing post-S3 even for the BSP. When multiple cores /
> threads are present (and to come back online) in a package, for package
> scope MSRs this may be covered by APs doing the writes, but we can't rely
> on that.
>
> Signed-off-by: Jan Beulich <jbeulich@suse.com>
It's a bit unfortunate that we end up doing self-IPIs for the BSP
also, but that should be fixed elsewhere.
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Thanks, Roger.
next prev parent reply other threads:[~2026-05-14 13:07 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-12 15:34 [PATCH for-4.22 v2 0/8] x86/mwait-idle: sync up with Linux 7.0-rc Jan Beulich
2026-05-12 15:35 ` [PATCH for-4.22 v2 1/8] x86/mwait-idle: arrange for BSP MSR adjustments during S3 resume Jan Beulich
2026-05-14 13:06 ` Roger Pau Monné [this message]
2026-05-12 15:36 ` [PATCH for-4.22 v2 2/8] x86/mwait-idle: clean up BYT/CHT auto demotion disable Jan Beulich
2026-05-14 14:10 ` Roger Pau Monné
2026-05-12 15:36 ` [PATCH for-4.22 v2 3/8] x86/mwait-idle: latch struct idle_cpu contents Jan Beulich
2026-05-12 15:36 ` [PATCH for-4.22 v2 4/8] x86/mwait-idle: move pre-initialized struct idle_cpu instances Jan Beulich
2026-05-12 15:37 ` [PATCH for-4.22 v2 5/8] x86/mwait-idle: Remove the 'preferred_cstates' parameter Jan Beulich
2026-05-12 15:37 ` [PATCH for-4.22 v2 6/8] x86/mwait-idle: drop const from struct cpuidle_state arrays Jan Beulich
2026-05-12 15:38 ` [PATCH for-4.22 v2 7/8] x86/mwait-idle: Add cmdline option to adjust C-states table Jan Beulich
2026-05-14 15:18 ` Roger Pau Monné
2026-05-15 6:57 ` Jan Beulich
2026-05-15 7:59 ` Roger Pau Monné
2026-05-12 15:38 ` [PATCH for-4.22 v2 8/8] x86/mwait-idle: Add C-states validation Jan Beulich
2026-05-14 15:30 ` Roger Pau Monné
2026-05-15 7:01 ` Jan Beulich
2026-05-12 15:39 ` [PATCH for-4.22 v2 0/8] x86/mwait-idle: sync up with Linux 7.0-rc Jan Beulich
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