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Date: Tue, 4 Feb 2025 18:25:59 +0100
From: Greg KH <gregkh@linuxfoundation.org>
To: Paul Kramme <kramme@digitalmanufaktur.com>
Cc: stable@vger.kernel.org, chengming.zhou@linux.dev,
	Bendix Bartsch <bartsch@digitalmanufaktur.com>
Subject: Re: v6.12 backport for psi: Fix race when task wakes up before
 psi_sched_switch() adjusts flags
Message-ID: <2025020447-coziness-pedigree-3e5b@gregkh>
References: <CAHcPAXT=6GhKo4CnkveSm_X+EQXSz-GCRtigi5aFRscASSTFXw@mail.gmail.com>
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In-Reply-To: <CAHcPAXT=6GhKo4CnkveSm_X+EQXSz-GCRtigi5aFRscASSTFXw@mail.gmail.com>

On Tue, Feb 04, 2025 at 04:31:44PM +0100, Paul Kramme wrote:
> Hello,
> 
> we are seeing broken CPU PSI metrics across our infrastructure running
> 6.12, with messages like "psi: inconsistent task state!
> task=1831:hackbench cpu=8 psi_flags=14 clear=0 set=4" in dmesg. I
> believe commit 7d9da040575b343085287686fa902a5b2d43c7ca might fix this
> issue.
> 
> psi: Fix race when task wakes up before psi_sched_switch() adjusts flags

It is already queued up for the next 6.12.y release.

thanks,

greg k-h