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Tue, 02 Sep 2025 09:14:00 -0700 (PDT) MIME-Version: 1.0 References: <20250226030129.530345-1-riel@surriel.com> <20250226030129.530345-2-riel@surriel.com> In-Reply-To: From: Jann Horn Date: Tue, 2 Sep 2025 18:13:24 +0200 X-Gm-Features: Ac12FXwyx0L9zIZrTUl0hsCo4DRTysWot4oLg__Szbm5KqsLu80QgAIdMR5Q9ks Message-ID: Subject: Re: [BUG] x86/mm: regression after 4a02ed8e1cc3 To: Giovanni Cabiddu Cc: Rik van Riel , x86@kernel.org, linux-kernel@vger.kernel.org, bp@alien8.de, peterz@infradead.org, dave.hansen@linux.intel.com, zhengqi.arch@bytedance.com, nadav.amit@gmail.com, thomas.lendacky@amd.com, kernel-team@meta.com, linux-mm@kvack.org, akpm@linux-foundation.org, jackmanb@google.com, mhklinux@outlook.com, andrew.cooper3@citrix.com, Manali.Shukla@amd.com, mingo@kernel.org, Dave Hansen , baolu.lu@intel.com, david.guckian@intel.com, damian.muszynski@intel.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: EB3C314000D X-Stat-Signature: btuu4e4na3k3jpn9m9aymje8emk3tb3g X-Rspam-User: X-HE-Tag: 1756829641-729316 X-HE-Meta: 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 Pzb6OvO2 0r2NMMisN/wcRud37vDxXdLwTQwSpW82rwscwX1Ez1z0dDKCh4squt1LJ7n0PXqlwxReWXzanCWEUKtcdjpwZjPAiix62+QujlX0wJecjIrpVN6mi0wt1CDnP/84S56WeDlmqCIRrXvKg0c77LbbkMBs+6VChbEGXmIOSj7Zw+eW1Q9bRqEaHMX1DLkwx34Rot5qooJnmWa05MQ4xPGoI4Dr4CMVw15YyeEuedZ9wWuu9xZOZT6GwMmZMTmjeFMjgbLKjpeHsMqB0ZM4xWADLsi7hbs/hvy7rVEFy X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Sep 2, 2025 at 6:05=E2=80=AFPM Jann Horn 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.)