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AJvYcCWL6t4MsqsHEZ3eP3SQvounNbbtCXmWgDZXj9vjZ1zAfNo6sZ95ChGDHfikBsY/+xDXMJFlMCtvPQ==@kvack.org X-Gm-Message-State: AOJu0YwmCKJTmnnhv9UZlsmD0Br7v+msxfHExGDYru/2nkuBkeaACx9Y TysZS/UmUupcKGn7QcXt/QTg9lpBZ8vOTEMRQl2A+WWMTywSz6c6NHAZKa+JbUAGkgCNjUBnQbl yrZ6pm0Y+vUudt+ABmmQSXl6XjiQ= X-Google-Smtp-Source: AGHT+IHjsfkw2aeBUVDVrVG/6UisZZxDo+qbMKKuG77YB+rauhS3AjHvX6nDl2CuRPLzzEmJnNU7Qjz+QJw8PszpMNw= X-Received: by 2002:a17:903:1c7:b0:215:6c5f:d142 with SMTP id d9443c01a7336-22fc93dbc45mr134261975ad.20.1746965311606; Sun, 11 May 2025 05:08:31 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Ozgur Kara Date: Sun, 11 May 2025 12:08:34 +0000 X-Gmail-Original-Message-ID: X-Gm-Features: AX0GCFurRk8VhBTGllT1fQtNh8FcPEIWgtp8UNTjbA0psT_bs29FpLvWURw0KsU Message-ID: <01100196bf3f39fa-6a0efe25-8752-4c2b-8353-b259059ab2f9-000000@eu-north-1.amazonses.com> Subject: Re: Kernel panic - not syncing: System is deadlocked on memory To: Yin Guoyu Cc: akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Feedback-ID: ::1.eu-north-1.jZlAFvO9+f8tc21Z4t7ANdAU3Nw/ALd5VHiFFAqIVOg=:AmazonSES X-SES-Outgoing: 2025.05.11-23.251.240.9 X-Rspam-User: X-Rspamd-Queue-Id: A9B9F140002 X-Rspamd-Server: rspam09 X-Stat-Signature: 5cw78nxsiu4s6n1xh5rpz8jrugj8pkta X-HE-Tag: 1746965315-55798 X-HE-Meta: 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 2glw/HTZ 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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: Yin Guoyu , 11 May 2025 Paz, 14:35 tarihinde =C5=9Funu= yazd=C4=B1: > > Hi, > When I test the Linux kernel (commit > 38fec10eb60d687e30c8c6b5420d86e8149f7557), I encountered a kernel > panic issue related to memory allocation, specifically in the > alloc_pages_mpol function. The panic message indicates "System is > deadlocked on memory," and the call trace points to > __alloc_frozen_pages_noprof failing to allocate pages, leading to an > OOM condition. > The error originates in alloc_pages_mpol, which calls policy_nodemask > to determine the nodemask and nid for memory allocation. The > subsequent call to __alloc_frozen_pages_noprof fails when the system > runs out of memory, with no swap available and no killable processes. > This crash can be triggered by executing the provided C reproducer > multiple times. The reproducer performs a series of system calls > (e.g., file creation, perf_event_open, io_submit, and filesystem > mounts), which likely stress the memory management system and expose > the bug. Hello, did you open a bug for this? https://bugzilla.kernel.org And i'm not sure if this is a bug i gues you are using qemu and you experienced OOM (out of memory) because there is no swap and physical ram is completely full. it gets killed while kernel is initializing. [ 133.880979] Free swap =3D 0kB [ 133.889391] Out of memory and no killable processes... This was an expected kernel behavior when there was no swap. Regards, Ozgur > This can be reproduced on: > HEAD commit: > 38fec10eb60d687e30c8c6b5420d86e8149f7557 > console output : https://pastebin.com/raw/T4dfWHSf > kernel config : https://pastebin.com/raw/u0Efyj5P > C reproducer : https://pastebin.com/raw/3hPqjF6M > > >