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Mon, 05 Oct 2026 08:32:25 +0000 X-Mizu-Trace-ID: 73cb7fec8dce91d4 X-Migadu-Flow: FLOW_OUT Message-ID: <38541ec6-d796-4f35-a700-75ab097b6df5@linux.dev> Date: Mon, 5 Oct 2026 16:32:10 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/1] x86/mm: fix incomplete page-table invalidation with TCE To: Andrew Cooper , Pedro Falcato Cc: dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, tglx@kernel.org, mingo@redhat.com, bp@alien8.de, 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> Content-Language: en-US From: Lance Yang In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 734AE40002 X-Stat-Signature: stcxjf15ic5iroz4cteguowh7n33us8t X-HE-Tag: 1791189147-521551 X-HE-Meta: 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 0f3qyHS0 l/NalDd1YZI7LGuEBUZEhgTz4ppY3kClzwfQVcFK0Oc2En99G8CM+h4u/HCWtCRJk6oq1NErDgrO3pakMf6YcN+q2b318yi9FWImozy+JCY0kQL24v7bkRabuw/CJHucESqTuOVETUdDW9fI8Pow0t3FT8EZxFDt1jqF/fzblIVL9JdrXcSpYuSrW9GX8JfhdRo+P9u9CpuHTqfEHsQ45/AWIXYhXmpN0sYglhcMdIeGmpUd8z6RwwoqFGJRr52oIPmGUC0cgkakOuLMMoNln+unXmkWNGd1X6f1J0dEIMssXfDzSZHj7V6P+BYEkNfrPCCOJPogQkZJufZi0CMSvowYwtIXgiyl24BqeyTWScrxDu4jF0tMEEoERTw== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 2026/10/5 16:19, Andrew Cooper wrote: > On 05/10/2026 8:29 am, Lance Yang wrote: >>> >>> Did you repro any bug related to this? The functionality is perhaps >>> underspecified in the AMD manual. >> >> TBH, I don't have a reproducer yet. Just LLM stumbled upon this while >> I was investigating another memory corruption issue [1]. >> >> [1] >> https://lore.kernel.org/linux-mm/arY1Wq6R9OY20ans@pcnci.linuxbox.cz/#t > > What hardware are you running on? > > That looks like the Zen5 issue, for which you want either the latest > microcode out of linux-firmware and/or > https://lore.kernel.org/r/20261002211617.1001617-1-bp@kernel.org > > TCE is a no-op in Zen1 and later, so unless you're on older hardware, it > won't be that. Just to clarify ... these are two separate issues. I mentioned [1] only to explain how this came up while investigating something else. I'm not claiming that TCE caused the corruption reported there :)