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[89.73.96.21]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a868f21fe18sm269127766b.29.2024.08.23.08.07.10 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 23 Aug 2024 08:07:11 -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: Fri, 23 Aug 2024 17:06:58 +0200 Cc: Linux regressions mailing list , LKML , Johannes Weiner , Yosry Ahmed , Nhat Pham , Linux-MM Content-Transfer-Encoding: quoted-printable Message-Id: <02D2DA66-4A91-4033-8B98-ED25FC2E0CD6@gmail.com> References: <6f65e3a6-5f1a-4fda-b406-17598f4a72d5@leemhuis.info> To: Matthew Wilcox X-Mailer: Apple Mail (2.3776.700.51) > Wiadomo=C5=9B=C4=87 napisana przez Matthew Wilcox = w dniu 23.08.2024, o godz. 15:13: >=20 > I wouldn't be surprised if this were dodgy ram. Well - that was my initial hypothesis. in fact i had few of them. Ranked (and ordered) like this: 1. downstream kernel patches 2. hw (ram) issue 3. kernel bug So full history was: -build myself archlinux 6.10.2 kernel; upgrade builder OS (only kernel; = nothing else) -run normal devel process and (to my surprise) discover interrupted = CI/CD builds by kernel oops -downgrade to 6.8.2 and done 4 full builds (full takes 8..9h of constant = 12c/24/t compile). all good. =20 -prepare vanilla 6.10.6 (to exclude potential downstream (ArchLinux) = root causes) -run normal devel process and still discover oops -make sure hw is ok by week of test with 6.8.2 (recompiling for 3 = architectures on 4 OS (3 in kvm). This was almost 5 full days of 12c/24 = compiling. All good -because last steep was all good - decide to go to you :-) sure - this is possible that 6.8.2 had luck with my ram and 6.10.6 had = no luck=E2=80=A6.but i personally don=E2=80=99t believe this is a = case=E2=80=A6. =20 btw: we can go with elimination strategy. So what i need to change/disable to be closer to finding root cause? swap? now it is swapfile on system nvme