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[89.73.96.21]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a868f2e48e2sm269559166b.89.2024.08.23.08.07.09 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 23 Aug 2024 08:07:10 -0700 (PDT) Content-Type: text/plain; charset=utf-8 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) X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 080AD1A001F X-Stat-Signature: 4zq3yu8pn1d7u8gbtiibgw7pn7oxi7z6 X-Rspam-User: X-HE-Tag: 1724425632-560587 X-HE-Meta: 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 3TXdpT4a 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.001170, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: > 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