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Fri, 19 Jul 2024 13:47:34 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Nhat Pham Date: Fri, 19 Jul 2024 13:47:23 -0700 Message-ID: Subject: Re: zswap_writeback_entry crashes in 6.9.5 To: Pedro Falcato Cc: mm , Linux Regressions , Johannes Weiner , Yosry Ahmed , Chengming Zhou , Christian Heusel , yshuiv7@gmail.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: 145B2100011 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: fuoq1hxrypt8f76imeb4x7e5nw3huhnr X-HE-Tag: 1721422054-996226 X-HE-Meta: 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 dTOJtJGt YlJvRX/FNJTYGfGzUxCaabN9bbEulast3cy+HpnCxq5iuTO7S8a4QGXyicTB/hmhc61Oa2C51Jj/4syV4Ok3MbI3Iy+IDSHiheMqNhjQAn1T2meJxYNH3/HPE9tAkdmhrUTqkcGZy8Q7PUlaewpQkM7B8D9RFwp+Vouqw+ssxdqIlGItrRpI5kCdoXnjTspnVMlJn4+7aUthgjrKsL0Lr2WrqILGEinj9kQ3V9mNSfDAKz+VWzjMevyoMa8zGJ3m1dAjem9ka+hUtrBA6HIo9ZFAaNfDq+4zhC6aM+fKDRe4Ijv2EZaDZPyETIBozu9kYK2JMng8rk4xrTZCevvrnacXXJ9iQSOA9WbNtE4CPzzS0pkK8MHIscnrNVGnlV+jhVwqjSBMRqdOdF4ISeCyYQvekKKCzSCTeach3DKzz6sKZU68esp6yBwKVLmHfVkEwsCPgl5A+Ql3ZgXpiJj5RM4kQjA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.008379, 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 Fri, Jul 19, 2024 at 11:57=E2=80=AFAM Pedro Falcato wrote: > > On Mon, Jul 1, 2024 at 2:07=E2=80=AFAM Nhat Pham wrot= e: > > > > On Sun, Jun 30, 2024 at 10:58=E2=80=AFAM Pedro Falcato wrote: > > > > > > Hi everyone, > > > > Hi Pedro, > > > > I have a separate theory. I also run the NVIDIA proprietary drivers. > slabinfo -a shows us: > [...] > :0000080 <- zswap_entry Acpi-Parse kernfs_iattrs_cache > uvm_tools_replay_data_t Acpi-State audit_tree_mark > [...] > > See the uvm_tools_replay_data_t there? Yeah, it's entirely possible > some random nvidia.ko bug has been corrupting zswap_entry from time to > time (which explains why e.g the big server people have not seen > this). Oh this is fascinating. I would never have guessed this. Thanks for doing the investigation! > I'm not sure if Yuxuan is running the same driver, but their kernel is > also proprietary-tainted. > > As such I'll refrain from posting more about this or similar bugs > until I can get a guarantee it happens with a non-tainted kernel > (fwiw, I have not seen crashes for 2 weeks or so, hopefully this issue > is fixed). Crossing my fingers :) > > Again, sorry for not checking the taint before posting this, and thank > you for your time :) No worries at all :) Let me know if there are new developments regarding this issue, or if you are able to confirm one way or another :)