linux-kernel - Re: 32 bit qemu regression from v6.5 tip pull [6c480f222128 x86/alternative: Rewrite optimize

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Message-ID: <20231030082644.GK26550@noisy.programming.kicks-ass.net>
Date:   Mon, 30 Oct 2023 09:26:44 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Paul Gortmaker <paul.gortmaker@...driver.com>
Cc:     Borislav Petkov <bp@...en8.de>,
        Richard Purdie <richard.purdie@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: 32 bit qemu regression from v6.5 tip pull [6c480f222128
 x86/alternative: Rewrite optimize_nops() some]

On Sun, Oct 29, 2023 at 02:41:46PM -0400, Paul Gortmaker wrote:
> The TL;DR is that the Yocto folks encountered a regression in their
> automated QA tests (after a move from v6.4 --> v6.5) where non-KVM
> enabled boot tests on 32 bit x86 would (with ~2% frequency) splat with:

You're sure you're not running into this here:

  https://lkml.kernel.org/r/20230706170537.95959-1-richard.henderson@linaro.org

?