linux-kernel - Re: [BUG] x86/mm: regression after 4a02ed8e1cc3

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Message-ID: <CAG48ez03UYAdqZcQxG9ejJFnSNE=ADU=mn-_zk9fmyBzTHo7QA@mail.gmail.com>
Date: Tue, 2 Sep 2025 18:13:24 +0200
From: Jann Horn <jannh@...gle.com>
To: Giovanni Cabiddu <giovanni.cabiddu@...el.com>
Cc: Rik van Riel <riel@...riel.com>, x86@...nel.org, linux-kernel@...r.kernel.org, 
	bp@...en8.de, peterz@...radead.org, dave.hansen@...ux.intel.com, 
	zhengqi.arch@...edance.com, nadav.amit@...il.com, thomas.lendacky@....com, 
	kernel-team@...a.com, linux-mm@...ck.org, akpm@...ux-foundation.org, 
	jackmanb@...gle.com, mhklinux@...look.com, andrew.cooper3@...rix.com, 
	Manali.Shukla@....com, mingo@...nel.org, Dave Hansen <dave.hansen@...el.com>, 
	baolu.lu@...el.com, david.guckian@...el.com, damian.muszynski@...el.com
Subject: Re: [BUG] x86/mm: regression after 4a02ed8e1cc3

On Tue, Sep 2, 2025 at 6:05 PM Jann Horn <jannh@...gle.com> wrote:
> To me this looks like a change that is correct but makes it easier to
> hit IOMMU flushing issues in other places.

(This was ambigous; to be clear, I meant that 4a02ed8e1cc3 looks
correct to me, and that the suggested fix doesn't look to me like it
fixes anything.)