linux-kernel - Re: [patch 2/4] sched/mmcid: Protect transition on weakly ordered systems

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Message-ID: <b2c4ae33-ee1c-4660-809e-27983cf4232b@linux.ibm.com>
Date: Sat, 31 Jan 2026 00:20:12 +0530
From: Shrikanth Hegde <sshegde@...ux.ibm.com>
To: Thomas Gleixner <tglx@...nel.org>, LKML <linux-kernel@...r.kernel.org>
Cc: Ihor Solodrai <ihor.solodrai@...ux.dev>,
        Peter Zijlstra <peterz@...radead.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Michael Jeanson <mjeanson@...icios.com>
Subject: Re: [patch 2/4] sched/mmcid: Protect transition on weakly ordered
 systems

Hi Thomas.

On 1/30/26 2:50 AM, Thomas Gleixner wrote:
> Shrikanth reported a hard lockup which he observed once. The stack trace
> shows the following CID related participants:
> 

I lost the system where this was seen once.
But I gave the series a try on another power(NV) system.

Ran schbench (which seems to execute some cid stuff) and hackbench
and didn't see any splat in limited testing.