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Thu, 16 Jan 2025 19:09:23 -0800 (PST) MIME-Version: 1.0 References: <20250116092254.204549-1-nphamcs@gmail.com> In-Reply-To: From: Nhat Pham Date: Fri, 17 Jan 2025 10:09:12 +0700 X-Gm-Features: AbW1kvaBw9xx6rWj6HivtSRaDXvhNfuzC6-dNra3a1o3YQcsDegJ6YBG7gCb0lo Message-ID: Subject: Re: [LSF/MM/BPF TOPIC] Virtual Swap Space To: Yosry Ahmed Cc: lsf-pc@lists.linux-foundation.org, akpm@linux-foundation.org, hannes@cmpxchg.org, ryncsn@gmail.com, chengming.zhou@linux.dev, chrisl@kernel.org, linux-mm@kvack.org, kernel-team@meta.com, linux-kernel@vger.kernel.org, shakeel.butt@linux.dev, hch@infradead.org, hughd@google.com, 21cnbao@gmail.com, usamaarif642@gmail.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: BB2FF40006 X-Stat-Signature: igbw6y9ghr379ia79orwgmrwsfy7egt7 X-Rspam-User: X-HE-Tag: 1737083364-866701 X-HE-Meta: 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 pRrz2rTj 8Hb46h4HIHG4SjW7/g3PKwcDL+E5O3LGfjMXTBfVoGyROlewJCNkmbO3cdAXUGTc70MAJk3KR9pCeDFurgztNHN60/Y/Ps9Yowpm1i8B/l+gHV6MmgwffBVFkJYQ3CeJLjdjE4SYbaiq0SCHnL3qhHJFXOrjQsqeSxdNhXNxsBRQWS6wWhO6VHbwlcWFqIrQ6YQacABLVNF0nq+gyDjCGgRrUS0SNPpQsvR5zgjmozWMRIvTe+fUEFKnKiGwmx6z1YTfXf/Jxcq4NqYRJp7G3QX0YcfgOn0kKnXkLfI4J8c/A16VqaDG2g7O9oiXtnKGEy54fCgG8d8DPI5HOysFT8dwpIA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.267745, 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 Fri, Jan 17, 2025 at 9:47=E2=80=AFAM Nhat Pham wrote= : > > No particular reason why we can't squeeze it into swap counts other > than clarity :) It's going to be a bit annoying working with swap > count values (swap count increment is now * 2 instead of ++ etc.). errr.. +=3D 2 I suppose (since the lowest bit is now the swap cache bit). But point stands I suppose lol. Getting exact swap count will be swap read then divide by 2 etc.