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[99.254.121.117]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-43e40f144d0sm70996451cf.96.2024.05.21.14.37.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 May 2024 14:37:10 -0700 (PDT) Date: Tue, 21 May 2024 17:37:07 -0400 From: Peter Xu To: Mikhail Gavrilov Cc: Pavel Tatashin , axelrasmussen@google.com, David Hildenbrand , nadav.amit@gmail.com, Andrew Morton , Linux Memory Management List , Linux List Kernel Mailing Subject: Re: 6.10/bisected/regression - commit 8430557fc584 cause warning at mm/page_table_check.c:198 __page_table_check_ptes_set+0x306 Message-ID: References: MIME-Version: 1.0 In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 1ECBB4001D X-Stat-Signature: orn8hgoxpby1nbentak7y4ec71rbpmqg X-Rspam-User: X-Rspamd-Server: rspam04 X-HE-Tag: 1716327433-454023 X-HE-Meta: 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 gDpw4/xi 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 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 Wed, May 22, 2024 at 01:48:36AM +0500, Mikhail Gavrilov wrote: > On Wed, May 22, 2024 at 1:45 AM Peter Xu wrote: > > > > > > Did you forget to attach the kernel config? If so, please attach it, I'll > > try that, as my local config won't reproduce with CONFIG_DEBUG_VM_PGTABLE=y. > > > > Oh, sorry. > Now I've definitely attached it. Hmm I still cannot reproduce. Weird. Would it be possible for you to identify which line in debug_vm_pgtable.c triggered that issue? I think it should be some set_pte_at() but I'm not sure, as there aren't a lot and all of them look benign so far. It could be that I missed something important. Thanks, -- Peter Xu