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AJvYcCVOgtGdtnMiOnZHJMyMQI/B9pXQWiPCainFgsSc80uH9ozOP850k6hvoP246ZlxQQY8aFu8EST7kQ==@kvack.org X-Gm-Message-State: AOJu0Yyw/c5ZrKirmu6N2mYy5ufs3i89Hzf094JXIIb/THQ946TddJNQ oPIAeQvPAEb0xjKnbAnnbTdQVWmJrNgWKuU824ao+xq5/OiXfrAcy5+Jpb0WDMKZG8JibmlYWDU BfE63540ZBhiandUOlyiFeuAy6PvI76KTbnTH X-Google-Smtp-Source: AGHT+IEDE84HW8WhltURoZPE6AnT1p3yEylLwiUEf8EfZjo6o3kJOFM23s7uhP84XseafK+WQn8SInwK5adVNDb6Bys= X-Received: by 2002:a17:906:c14d:b0:a86:90b8:9ac9 with SMTP id a640c23a62f3a-a86a52cc979mr1096924066b.39.1724784536549; Tue, 27 Aug 2024 11:48:56 -0700 (PDT) MIME-Version: 1.0 References: <6f65e3a6-5f1a-4fda-b406-17598f4a72d5@leemhuis.info> <02D2DA66-4A91-4033-8B98-ED25FC2E0CD6@gmail.com> <3D1B8F1F-2C41-4CCD-A5D7-41CF412F99DE@gmail.com> In-Reply-To: <3D1B8F1F-2C41-4CCD-A5D7-41CF412F99DE@gmail.com> From: Yosry Ahmed Date: Tue, 27 Aug 2024 11:48:19 -0700 Message-ID: Subject: Re: [regression] oops on heavy compilations ("kernel BUG at mm/zswap.c:1005!" and "Oops: invalid opcode: 0000") To: Piotr Oniszczuk Cc: Pedro Falcato , Nhat Pham , Matthew Wilcox , Linux regressions mailing list , LKML , Johannes Weiner , Linux-MM Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspam-User: X-Rspamd-Queue-Id: 9D9C6100004 X-Rspamd-Server: rspam01 X-Stat-Signature: guo66qcar44zdgtwp3o5rki1wcshxqoz X-HE-Tag: 1724784538-969739 X-HE-Meta: U2FsdGVkX1/Vgw3OtHUQUZfYPiFUPO8PoHoNzAuzmI+yMtyeLZ45Gvy0nibcIgIEnb9CBeySObL+kEAm/S034UxlLoUcLhVbo1h7YC0zBaJ4YzYnquhnvyJ/c7an0JMUZEOx/A9SbY+7Wyzo90LxqnxALh+1ouCSaD2ElBBrWr65BCRyKDQmN3XZVA2ppKP6ZrsLza4rP4Gm3gH9waGvsvxUDy1bUhA9D6EZ1caY9tWZShLqR8j4chbtIL++idqu6fXudMeGtZmZ6VZyPjDh19JzSCYfFsebLM4235JX9U94Po61iNg17gtLl7kvVxDMwZEIVznhtEQCOpbjs1rkVlVEKEaPWf7bv/7EIvXeht2RjtCNZyzQvOFhvdaQCljng3etGzu0g2S0vZM2Ljw2xYbchfmXKv9n3C2yeOZhfpxno6viPaSw2Rm9e3Zv87kil3uc7fcxLpmxF/JDl4Ug+IZbNwfVkdHV2BUdy1/q6RbEd9RU+Ps4L5pYZYeolxaSZN0Kccml0NeBJXVg6WFrpcq/OFefmfnUxGAAaIq8ePU9B6IVO+7O6JeWon4VWfFymFJiP2Lmno5ztZWn6cqONWC9AAhKujWlTafhMmZDh793o/fsyX6MePidHHq6oXxaZJ4mjEqTFLDmPbA5vl5zvh13lnd5dxHdIq91ZxHN2oFBTPSJJOLLDAQZwb5JRiYoDHrUphNQWMg7COc/TbSxZQk0Jx+0VeBfxq8TOrDF/H870/AYR9I51kFQIimfLglGZ8eImsHI76Bb7FwXotorY1QLOIXNPmcSCrlltBgrPHfeApBrqhM6QlGqSixrzB3TOWinxZhu7yRroWUpju+3Mr5xkZAKpU2mQ/d7sxf2ACfDXZG8fhUHAzkT1v1XqjMZZ6FoBQBum2t8frJxnFWzQgUAQmfFKXugVvPeoKXBDwrEz2P68nVDung7nnZjO88l6fwmC+i1WIxrozqca1+ Lm/UcOjS LSdiKMhSerD+RyzehS3SyENLro+AUmEn/FepZ2UUyrcE8TTB0nVHNQ9PnmNYsRGOH1haaGSfe/ZPJaIYA4P3+auSte6VeI5rnLahpDEu0Dri1eJPPVw3Lvc/U/9F2G8U1JlraIYb2U1FG0u4hf16+Y3cJ8W+O7tD1/xhBlRwpPxIZIZGyChOnSkxTNm8ixlM4SIkhBEZSCJ3WxeKGYnMhvKRFleSJBF/oq1oaNVG15fbrUfmK+KSe8eYEt5RvgWS7HC1O3UDG1KwDHcsor5+R+9WEAuMwEEXFZRLI+0VIjcrJFGtzTEgxs6J9El4vr6rWpzxOuwcWrOAhRcA= X-Bogosity: Ham, tests=bogofilter, spamicity=0.006292, 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 Sun, Aug 25, 2024 at 9:24=E2=80=AFAM Piotr Oniszczuk wrote: > > > > > Wiadomo=C5=9B=C4=87 napisana przez Pedro Falcato w dniu 25.08.2024, o godz. 17:05: > > > > Also, could you try a memtest86 on your machine, to shake out potential= hardware problems? > > > I found less time consuming way to trigger issue: 12c24t cross compile of= llvm with =E2=80=9Eonly 16G=E2=80=9D of ram - as this triggers many heavy = swappings (top swap usage gets 8-9G out of 16G swap part) > > With such setup - on 6.9.12 - i=E2=80=99m getting not available system (d= ue cpu soft lockup) just in 1..3h > (usually first or second compile iteration; i wrote simple scrip compilin= g in loop + counting interations) Are we sure that the soft lockup problem is related to the originally reported problem? It seems like in v6.10 you hit a BUG in zswap (corruption?), and in v6.9 you hit a soft lockup with a zswap lock showing up in the splat. Not sure how they are relevant. Is the soft lockup reproducible in v6.10 as well? Since you have a narrow window (6.8.2 to 6.9) and a reproducer for the soft lockup problem, can you try bisecting? Thanks!