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Mon, 05 Oct 2026 14:36:45 +0000 X-Mizu-Trace-ID: 16f5694261043640 X-Migadu-Flow: FLOW_OUT Message-ID: Date: Mon, 5 Oct 2026 22:36:26 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/1] x86/mm: fix incomplete page-table invalidation with TCE Content-Language: en-US To: Borislav Petkov Cc: Andrew Cooper , Pedro Falcato , dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, tglx@kernel.org, mingo@redhat.com, x86@kernel.org, hpa@zytor.com, riel@surriel.com, linux-kernel@vger.kernel.org, qi.zheng@linux.dev, nadav.amit@gmail.com, thomas.lendacky@amd.com, kernel-team@meta.com, linux-mm@kvack.org, akpm@linux-foundation.org, brendan.jackman@linux.dev, jannh@google.com, mhklinux@outlook.com, Manali.Shukla@amd.com, mingo@kernel.org, stable@vger.kernel.org, toshi.kani@hpe.com, david@kernel.org, mikhail.v.gavrilov@gmail.com References: <20261005052302.43042-1-lance.yang@linux.dev> <60d5db86-8002-4d87-b8d3-c161d674122b@linux.dev> <38541ec6-d796-4f35-a700-75ab097b6df5@linux.dev> <7ad90e94-d04d-453a-ba22-9640a5024d8c@citrix.com> <6801221a-6307-407a-85fc-46906f95d22e@linux.dev> <20261005142216.GAasOymJHYnmn6wD5m@fat_crate.local> From: Lance Yang In-Reply-To: <20261005142216.GAasOymJHYnmn6wD5m@fat_crate.local> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 64909140008 X-Rspam-User: X-Stat-Signature: e7w93zi3qm6dn6q8h9b9qzgmqsgxs6e4 X-HE-Tag: 1791211007-550089 X-HE-Meta: U2FsdGVkX19Tjcs12juXUeUKBRYA08G2uPlkzlWrx+t6+2Z/DmS9wE0wI3equpRli9vWv2YSaev38ZPyw0SnacRhkOvuhfpmJ7sTtRBZDRbhZ2nsPcF5uOEzgzsMmtMVGUZ5ti5dQqURWn8gcY6W/kN1koKtShr2fI7grMd/rbdxWAgycCpzW2sJvqipZ6lO5gQtvkIEtgClQZionhBOhE5UH4/ENNXy0tsvNTzlsl9HzDO/m6E9oJPmPXCP4Ar9w1tf6h98jQHGckjVLCebyfTN2hWp9LhfofB01dcL5D8+mh4mR5SYFMnT0pzb6kVHXYBlliMLbkzRpTyKeReNoplZ/0ZgVnksslRxFGPJntapzqhXuGpLUQIUMEPqDlTTeg+nJgYibEESH0mh6V6f54wW6UqI4oMusHq5tiiwaADv2CtjmrAn5pospSO3xHm2rSJ29L+VxXA8tbX+N70Gbv9kzPQPlh685XeMkM4WrNQ1vy76Xo2pAHeD4GwS09hLv/MnAhmrcBMQsL5RdOdfB6u3Yz7K6msWG3cKcvVbV9e292ZRrMHg3JaLzX2R8JSvchR90aqiFFGcXQEQuuOrrRbhSiBom6z7WnFFB3ecx5J0OnZv/BFbe84NGxzzHW6HQsZLU/O8AFPMMAZpdQDnH2OExRhylMR44o0O54J6U81elDEufWg9qatG7S95ZSpSsfQVjaRabCU8/EIQb2ZmIgArlaHsN3l7iq9+1+vn4cbvPuv24sQu7ClCqnEdPCyth09TBj7wdKz7/gSiXcrbhGgT2MlKCD4uewHVVXsmg668uH24sjcoJc4E1w8lvmBb5dcjHrRCdCPMyxWSONHjP5TddgG9veW9MBnSCk5E/o7uo6jRU1ROS+Vt1PTqu69cIOP7Xfk28CStarxhAiPUsuraiSC8oHOxzK30i6rW49CCl740lb4QkXYilY8kaj50QCCb3mr+4o3a4Ldvdbl MB3gt/rS vKt0TdX/Fusdn5YcghdyZqYiLkzDCe8jniay0zr4Wa0nI3rR7abd41Jet8wPCxIVODwZJHD+oQS2husPIfP5bF2FPayjs2bg9j0goCjYGtt3qNce6VFqGulKbRi0iIRMtx1RNfBJXpu12ESBXntW+66SubvwzRiQ8+yogudVaRiVsjaM4KSUnvkXa2nvjSqh0H/WqDR02gjjlFh1gKWQWE2H2His1z993OHtbkX8lTNF1j2Hmqf0hFlvpnpVZJWeoOO7bfpNs3QeIgEmiofPrMmRnajvYf7Qd428IuJdODs+8YMiq+3KHsUiTz7mguDQ5Ao4OyW4dVtcZDUmTYT0sJT4aBVttDO9nqqIz Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 2026/10/5 22:22, Borislav Petkov wrote: > On Mon, Oct 05, 2026 at 06:12:45PM +0800, Lance Yang wrote: >> Which CPU? None so far. As I said, I don't have a reproducer. I'm trying >> to make sense of what the manual says and what the code does ... > > So you're sending a patch for which you have absolutely no justification? And > CCing it to stable too? > > And that patch hasn't been tested to actually address anything? > > Just a wild hunch? > > I wouldn't do that in the future if I were you. > > HTH. I don't have an AMD machine to test this on. I spotted something that looked wrong in the code and sent it out to see what others think. Maybe I'm reading the manual wrong, but is raising a concern based on the code and the manual really just "a wild hunch"?