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Mon, 27 Oct 2025 20:31:20 -0700 (PDT) Received: from google.com ([2401:fa00:8f:203:2c65:61c5:8aa8:4b47]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-29498cf4a53sm100342125ad.6.2025.10.27.20.31.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Oct 2025 20:31:20 -0700 (PDT) Date: Tue, 28 Oct 2025 12:31:12 +0900 From: Sergey Senozhatsky To: Nhat Pham Cc: jinji zhong , minchan@kernel.org, senozhatsky@chromium.org, philipp.reisner@linbit.com, lars.ellenberg@linbit.com, christoph.boehmwalder@linbit.com, corbet@lwn.net, tj@kernel.org, hannes@cmpxchg.org, mkoutny@suse.com, axboe@kernel.dk, mhocko@kernel.org, roman.gushchin@linux.dev, shakeel.butt@linux.dev, akpm@linux-foundation.org, terrelln@fb.com, dsterba@suse.com, muchun.song@linux.dev, linux-kernel@vger.kernel.org, drbd-dev@lists.linbit.com, linux-doc@vger.kernel.org, cgroups@vger.kernel.org, linux-block@vger.kernel.org, linux-mm@kvack.org, zhongjinji@honor.com, liulu.liu@honor.com, feng.han@honor.com, YoungJun Park Subject: Re: [RFC PATCH 0/3] Introduce per-cgroup compression priority Message-ID: <4tqwviq3dmz2536eahhxxw6nj24tbg5am57yybgmmwcf4vtwdn@s7f4n2yfszbe> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 2DB8A1C000B X-Stat-Signature: rqan4izecz6oghssmwaww8d3b6hp931d X-HE-Tag: 1761622281-500524 X-HE-Meta: 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 BMk93UZU mBqiCfo+Aaa1Ba8KgKFRXWTcs2zF00cvSKz5CmrRQxAchGl3BkmJLNkVMwv3y+qecwVcw+0at84lFGaLbEK4nVKAPCUyoVJ6gcWGGR0ILPl0DqKkC/nQ2EXB011/P0K+dVYbQpXX2ZN7chxZrJ920Jw0EaIsNtFFWLvjYqqxDQBTF2vf6j7uRHr7uZdeXvRa2BtXKAhqLrlW77vrQ8K24wxK5cD4IIQkXVhC8/ajZVDwfaNAbHUZR6YfkI/Qty+Y/HHBnDelNyb0gqyXnimS2zOSutVR6ghbGRTBUHuHbwTCNj3xaLZPia8lD10nJTCwJTseH89uh8WWVM6HfqVCIxvJUH4Myfhqgcg3Z60yLAnQG44jaOmwekxpk8jYxoezuKuM4agqwpv+xvj0EBdb0crVr1mI5HP+mKu51gbydSHhygfs/YcrZUgiGvA== 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 (25/10/27 15:46), Nhat Pham wrote: > Another alternative is to make this zram-internal, i.e add knobs to > zram sysfs, or extend the recomp parameter. I'll defer to zram > maintainers and users to comment on this :) I think this cannot be purely zram-internal, we'd need some "hint" from upper layers which process/cgroup each particular page belongs to and what's its priority.