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Thu, 29 Feb 2024 09:28:29 -0800 (PST) Received: from localhost ([2620:10d:c092:600::1:1633]) by smtp.gmail.com with ESMTPSA id j26-20020a056e02219a00b0036431524782sm425517ila.43.2024.02.29.09.28.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Feb 2024 09:28:29 -0800 (PST) Date: Thu, 29 Feb 2024 17:28:27 +0000 From: Chris Down To: Yu Zhao Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, kernel-team@fb.com, Johannes Weiner Subject: Re: MGLRU premature memcg OOM on slow writes Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: User-Agent: Mutt/2.2.12 (2023-09-09) X-Rspamd-Queue-Id: 0134240018 X-Rspam-User: X-Rspamd-Server: rspam02 X-Stat-Signature: a1amtnakbj959xymkgngz8qss14unr8a X-HE-Tag: 1709227710-745281 X-HE-Meta: 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 zv63+myI oTvdM8eo4kwrpqzExSedR63oJgsVLon+On8BMI8PTXqLAuq6UnQkEDiEBOCR4+5IJujw7gt6ktfP6rrrY4ezF+4AJNXHXe4xKRoM+Rm7rJD3goD8MUz91nWmkrWfM12K1u9JkABpSI8dtwe/tE51+geEcWtKt42baloQcPNz+J9fnGr5aSU4gzuSoa14ng5c3GUUNipDUaSfGfT+d17UQmptsTgZJHLYzVId2GYjOocLeUH9vuMYnDIkRUuBplIfYFNCiZcHy90/9XqVvOCb7TqhGmzKcH6iKxrcboXT1BzbYxccJ+b3T6WNe79bmbZ+iovRywqfVWh0/GMeSlrvDwrFn+GjWM7kNtJxf5Ur5ror8k984wHgkZIKMwFULgxwTIQfPz7vymELRDEx2OSa85U7SjXP2JmKd4K0k4W70x+maYWjHL4v9r9Svi1PhMZVzFV0/mwRVteD3+D6uXnDfXz63FdIHhlb07N9eOpIs9b3YDP0= X-Bogosity: Ham, tests=bogofilter, spamicity=0.028819, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Yu, Following up since it's been a few weeks since I reported this. If MGLRU does not handle writeback pressure on slow devices without OOM, that seems like a pretty significant problem, so I'd appreciate your opinion on the issue. Thanks, Chris