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[2003:cb:c733:7c00:d067:e327:4f99:7546]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-431bd9cab13sm21417775e9.48.2024.10.30.06.16.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 30 Oct 2024 06:16:22 -0700 (PDT) Message-ID: <52e1b8e1-86dd-4abd-81e6-98828284a710@redhat.com> Date: Wed, 30 Oct 2024 14:16:20 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH 0/3] Cgroup-based THP control To: Matthew Wilcox , gutierrez.asier@huawei-partners.com Cc: akpm@linux-foundation.org, ryan.roberts@arm.com, baohua@kernel.org, peterx@redhat.com, hannes@cmpxchg.org, hocko@kernel.org, roman.gushchin@linux.dev, shakeel.butt@linux.dev, muchun.song@linux.dev, cgroups@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, stepanov.anatoly@huawei.com, alexander.kozhevnikov@huawei-partners.com, guohanjun@huawei.com, weiyongjun1@huawei.com, wangkefeng.wang@huawei.com, judy.chenhui@huawei.com, yusongping@huawei.com, artem.kuzin@huawei.com, kang.sun@huawei.com References: <20241030083311.965933-1-gutierrez.asier@huawei-partners.com> From: David Hildenbrand Autocrypt: addr=david@redhat.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 0398F100028 X-Stat-Signature: w637mxp8p9gaos7pd75niks5q14zyf8o X-HE-Tag: 1730294137-198514 X-HE-Meta: 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 JGXGB9Mg 0jGkpeg9qhtmcfz9LHZgTyqJRt5eeO3KKibwlAVKDXwW0NMUIh7/dPR0GfGIPIA2wdZPmhwqZ7svXgOdToAp9Oir4CY3E0FUXK9c+gcwoAnm2K2Bfistw4G1y2Gg6E9d+c8Q4yGKdUs28O+iflXa9Wd42kspXV8RmMgUxHVKevjfDkkrob8Kseuu4bVfyNcUE02AkS52QIKAFUfN4uD2PuN1M1T9AJPV2ypiI22luwyB/XZ3BI50/kp/YxYXxQvT1xmnpwuQpxnmnPAfPSqop5rB8n7ib+pMHzs9PaXUZiv/dOBMbzuHXgyGiA4NX56fu+X4lPDOCMlczpaZLcAvD+QsmBcOeYVqqStVRoZBMHjBvP76pw04sb/9CKDj5uBRPtcmpACElq85rxF2i30s4Pwnkcsgja8C/pt1bnkIgM2ok+7e8go7N5oa1vleNKDCZ/WRmXy4/vnl2DbI= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000004, 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 30.10.24 14:14, Matthew Wilcox wrote: > On Wed, Oct 30, 2024 at 04:33:08PM +0800, gutierrez.asier@huawei-partners.com wrote: >> From: Asier Gutierrez >> >> Currently THP modes are set globally. It can be an overkill if only some >> specific app/set of apps need to get benefits from THP usage. Moreover, various >> apps might need different THP settings. Here we propose a cgroup-based THP >> control mechanism. > > Or maybe we should stop making the sysadmin's life so damned hard and > figure out how to do without all of these settings? In particular if there is no proper problem description / use case. -- Cheers, David / dhildenb