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b=cTVpqxqx/q3YShRhLM9GTA7g+G5oQJJqAFH5cmmF351bScmptSfdAzmnQu0Eviefp ZWIlpcocv68SUxF+DKJnxcDcbEHCr3t2FO33ROeT32VbFbxmEs9QOCUItO1mi4PnDG Ddjm2AgM/XPSqQzttet1pSi0ATh3sY0mzoNaC5zU= Date: Mon, 4 Nov 2024 14:18:34 -0800 From: Andrew Morton To: Yu Zhao Cc: Shakeel Butt , Johannes Weiner , Michal Hocko , Roman Gushchin , Muchun Song , Hugh Dickins , Yosry Ahmed , linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-doc@vger.kernel.org, Meta kernel team Subject: Re: [PATCH v1 5/6] memcg-v1: no need for memcg locking for MGLRU Message-Id: <20241104141834.fc30ea90bbc80446d0fcf1f0@linux-foundation.org> In-Reply-To: References: <20241025012304.2473312-1-shakeel.butt@linux.dev> <20241025012304.2473312-6-shakeel.butt@linux.dev> <20241104133834.e0e138038a111c2b0d20bdde@linux-foundation.org> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 965612000E X-Stat-Signature: h8hc46tfghw4p9fwu5jc1mnje7igrtzy X-Rspam-User: X-HE-Tag: 1730758701-124688 X-HE-Meta: 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 2GA6eIOY OKz93a81J7Px9jj9TrhVIrIHw4gSbHPwvMNCFhbVPFwSKQyLK6ZED1Gzn+b69qcRT29RnENlz7huKlnFtbBxOQwnXtfQ04ZjkDJlpuUanEV9rpcb4XDTheO+tq9eJP0iCcgTqhwrMAqu48sxBxoOJpZR0bBa80wZnldXjc4cABIoHfB1l/EDBYMy0dozSMQ+RhDkAKsWH/hngrFgooGNXZ6LeSSArgK7XBXQz391B2PKRuz/L/sgRvrUkQ+2zov8mgef2h9Nc3rbPamf+1RDmf1/S60gs72nLnqrBfSo33wbJKH5YnjGHLpqdm0qXds27XYGgxRn0TRkw5nxIx4I8aNpzP41X/jJM0ogO9HR3kG1UBg4= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, 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 Mon, 4 Nov 2024 15:08:09 -0700 Yu Zhao wrote: > > The assertion was caused by the patch in this thread. It used to > > assert that a folio must be protected from charge migration. Charge > > migration is removed by this series, and as part of the effort, this > > patch removes the RCU lock. > > > > > And a link to the sysbot report? > > > > https://syzkaller.appspot.com/bug?extid=24f45b8beab9788e467e > > Or this link would work better: > > https://lore.kernel.org/lkml/67294349.050a0220.701a.0010.GAE@google.com/ Thanks, I pasted everyone's everything in there, so it will all be accessible by the sufficiently patient.