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[89.73.96.21]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-2f4048acb0bsm10663581fa.125.2024.08.25.09.24.38 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sun, 25 Aug 2024 09:24:39 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3776.700.51\)) Subject: Re: [regression] oops on heavy compilations ("kernel BUG at mm/zswap.c:1005!" and "Oops: invalid opcode: 0000") From: Piotr Oniszczuk In-Reply-To: Date: Sun, 25 Aug 2024 18:24:28 +0200 Cc: Nhat Pham , Matthew Wilcox , Linux regressions mailing list , LKML , Johannes Weiner , Yosry Ahmed , Linux-MM Content-Transfer-Encoding: quoted-printable Message-Id: <3D1B8F1F-2C41-4CCD-A5D7-41CF412F99DE@gmail.com> References: <6f65e3a6-5f1a-4fda-b406-17598f4a72d5@leemhuis.info> <02D2DA66-4A91-4033-8B98-ED25FC2E0CD6@gmail.com> To: Pedro Falcato X-Mailer: Apple Mail (2.3776.700.51) > Wiadomo=C5=9B=C4=87 napisana przez Pedro Falcato = w dniu 25.08.2024, o godz. 17:05: >=20 > 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 = (due cpu soft lockup) just in 1..3h (usually first or second compile iteration; i wrote simple scrip = compiling in loop + counting interations) Then i switched back to 6.8.2 and=E2=80=A6. decided interrupt successful = test after 14 iterations (it was 19h of non-stop compiling with heavy = swapping) (sure - i can still keep test going - but builder is also needed for my = normal development) So summarising: -on 6.9+ just 1..3h seems enough to provoke issue -on 6.8.2 so far never in past + currently can=E2=80=99t provoke issue = (last day in 19h test window nor 5 full distro builds nor last 2 weeks = of development) By above i personally don=E2=80=99t believe issue is in hw (ram) =20=