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Fri, 15 Aug 2025 15:38:17 -0700 (PDT) MIME-Version: 1.0 References: <20250812170046.56468-1-sj@kernel.org> <2f75a76c-bdc1-6ca7-4438-21554831ec56@google.com> In-Reply-To: <2f75a76c-bdc1-6ca7-4438-21554831ec56@google.com> From: Chris Li Date: Fri, 15 Aug 2025 15:38:06 -0700 X-Gmail-Original-Message-ID: X-Gm-Features: Ac12FXzIQqOjNJhb-gjOaL6Nux9YI0GUqFop_i3tfHE5EMefJpuCak10WYPZD2g Message-ID: Subject: Re: [PATCH v2] mm/zswap: store Cc: SeongJae Park , Andrew Morton , Chengming Zhou , David Hildenbrand , Johannes Weiner , Nhat Pham , Yosry Ahmed , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Takero Funaki Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Stat-Signature: f5zcmrjwdqbj5eze1na8zuuyurye9m4r X-Rspam-User: X-Rspamd-Queue-Id: 3E55820002 X-Rspamd-Server: rspam01 X-HE-Tag: 1755297500-698617 X-HE-Meta: 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 jUI9UILJ daPsbIFRmfkg3unLYa0YCFFGO9RdSFcgOp3Hq0tAWb9sVWv6tvuzbToLQSutlvyRp7To8hCzNp6zZK+H5/nEpWiBj/MUVb7M7fJn0n0/S13/+fcIX1zrJbg5M3S3L/kWPrXI3Pm2d2/Rcwvon+EUJTBkzI6JDrkd1PVRXI7u3pAekhz8bqW4XHkBP0kEtKKxRNHeJ+TXKZT9f+FBQiHrgEIpbz/PDCSaXZOb3TK6dGtvKe4elq2cs/CamHuaYGEEFeLrdCebNhnb0TVsnlwDFimYQkNh/v6HPSoaxkRN4mzb7xlnENXdhxMoO+BPn5jihPboOjrbSwYkwuI5rGs2POHxbexCtPC3QcbBQ 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 Wed, Aug 13, 2025 at 11:58=E2=80=AFAM Hugh Dickins wr= ote: > > On Wed, 13 Aug 2025, Chris Li wrote: > > > > I know Hugh has some idea to store incompressible pages in the swap > > cache as well. Hugh? > > No, I don't have any idea or plan to store incompressible pages in the > swap cache myself. But yes, incompressible pages could well be "stored" > in the swap cache. Sorry Hugh, I don't mean to assign you more work. Just brainstorming. Yes it could. The pros will be no swap fault. The cons is breaking the zswap LRU ordering. Chris