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AJvYcCXGNyxDhbVFZTlcXbCq7bUPvyLluAmODB38rtYq8tHkA+QBgMuf2qCU4uB7gShklLdQLdHIx/W828N3NVlnAM73MuE= X-Gm-Message-State: AOJu0YyupzvuP1QJcQ3hVcmOEMYfX7VWye2GJkNSJ3uBI7OsOPE94XqG rQ1IPIVD2twAPea6u1vZgFIoumb6HZ6/IMcq73Ky1xaF0arOP5o0UB1jBzy7Jzh1gr/tlQYHV/a prnFxHmRO+LqWbrwkJzTOrClqtZ4= X-Google-Smtp-Source: AGHT+IHXcVJWsufgQu/YERKLpcZQ8yoTBJ6yZbXDYsNP2YUkdxsIKSp42+5n4mDwyD6UycltXNv3bjxEmMiv8pGCbxA= X-Received: by 2002:a05:6102:32cc:b0:493:d940:2ab8 with SMTP id ada2fe7eead31-495d8e30a9emr4424042137.14.1723452257309; Mon, 12 Aug 2024 01:44:17 -0700 (PDT) MIME-Version: 1.0 References: <20240726094618.401593-1-21cnbao@gmail.com> <20240726094618.401593-5-21cnbao@gmail.com> In-Reply-To: From: Barry Song <21cnbao@gmail.com> Date: Mon, 12 Aug 2024 20:44:06 +1200 Message-ID: Subject: Re: [PATCH v5 4/4] mm: Introduce per-thpsize swapin control policy To: Christoph Hellwig Cc: Chris Li , Matthew Wilcox , akpm@linux-foundation.org, linux-mm@kvack.org, ying.huang@intel.com, baolin.wang@linux.alibaba.com, david@redhat.com, hannes@cmpxchg.org, hughd@google.com, kaleshsingh@google.com, kasong@tencent.com, linux-kernel@vger.kernel.org, mhocko@suse.com, minchan@kernel.org, nphamcs@gmail.com, ryan.roberts@arm.com, senozhatsky@chromium.org, shakeel.butt@linux.dev, shy828301@gmail.com, surenb@google.com, v-songbaohua@oppo.com, xiang@kernel.org, yosryahmed@google.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Stat-Signature: mnqtphj43e1djutideujzamppa3xbm6a X-Rspamd-Queue-Id: D6DEA18001E X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1723452258-459330 X-HE-Meta: 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 wMIximNN 0p6q7Go8FCmXWuxdEkq0emn/S16ba0nfh8047Z8Kt1b2bKRw9mGzyb7rj1MuUZVQ+jq6NXCSHfr5iz8JPbjx/VoZLpPHJ/FKje9L6L93+JfD7DX5EjlGpKwO0mf3q8yRzW+lgQAgW5IqmsT9+PIcHX5OG3R0eKbY9Zhb/MpZcPSCIns/i95ffvN4AgNVQefEx0Q9pjq/wPF5G8bdrX2+ViuJaN05eAtH5FWEf5gLDENWxdq+OoNxtC6BUi86n4jgCHBhemd367FqzzI9epULEeaPHuzEEeh+ZfqtbNcmBnkRLr3j6dV+/a9j/9esz8XWuDJjnqbG+et0OlmrTC1hcEAexXPgILTtDRXm5cBSkWLzEe5I= 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, Aug 12, 2024 at 8:27=E2=80=AFPM Christoph Hellwig wrote: > > On Thu, Aug 01, 2024 at 01:55:51PM -0700, Chris Li wrote: > > Currently Android uses zram and it needs to be the Android team's > > decision to move from zram to something else. I don't see that > > happening any time soon. There are practical limitations. > > No one can tell anyone to stop using things. But we can stop adding > new hacks for this, and especially user facing controls. Well, this user-facing control has absolutely nothing to do with zram-relat= ed hacks. It's meant to address a general issue, mainly concerning slow-speed swap devices like SSDs, as suggested in Ying's comment on v4. Thanks Barry