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b=Yt4r16BzYI4WeotGZ0dx3l13TAzZEJ7pDFFXMu0AraLYNQiFZTqgnyClgwHC6VAE4 m9wCXzt8mqsrCWV6v9XxCcQQKZEdNj3xYxOXX+E7P8IiJ6rUWAnsoJJ6pu8J2Xw/f7 Cj9giHjT3BwMx7ngk+oJLDxYVWpPr2cI69sDAU5qdSvL2aaP9A19J4apIyhCx+gngp pPjfLr/8THLNbPIrmbRCoj9ydHZYAIf9+bUugyIiblY3Fv5bA6MGkbvRPnz+7QgA1l U1FnOUvC5jDQ9YKZF1aB0XJb4iNIVIAK3a+pGY9wE+5Orwzsiu5I57/etCCabfuaKr f8RK5y/zFN8wQ== From: SeongJae Park To: Cc: SeongJae Park , linux-mm@kvack.org, Asier Gutierrez , damon@lists.linux.dev, linux-kernel@vger.kernel.org, lsf-pc@lists.linux-foundation.org Subject: Re: [LSF/MM/BPF TOPIC] Data Access-aware Transparent Hugepages Date: Tue, 10 Feb 2026 21:07:28 -0800 Message-ID: <20260211050729.69719-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260211044533.69515-1-sj@kernel.org> References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam12 X-Stat-Signature: hxjyuzphaw43gqmosqwqmtb7r1pmpgzj X-Rspamd-Queue-Id: 7871020003 X-Rspam-User: X-HE-Tag: 1770786452-921725 X-HE-Meta: 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 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 Tue, 10 Feb 2026 20:45:33 -0800 SeongJae Park wrote: > Forgot Cc-ing damon@ and linux-kernel@. Adding those. Sorry for noise. And lsf-pc@ ... > > On Tue, 10 Feb 2026 18:28:55 SeongJae Park wrote: > > > Hello, > > > > > > Transparent Huge Pages (THP) could be more efficient if those are used only for > > frequently accessed data. DAMON is one of the ways for fidning such hot data, > > and hence there were interests in utilizing DAMON for access-aware THP. A > > simple experiment leveraging MADV_[NO]HUGEPAGE based on DAMON-identifed hot and > > cold memory regions was conducted as a proof of the concept. The experiment > > demonstrated [1] an 80% reduction in memory overhead while retaining 46% of THP > > performance gains. > > > > Multiple discussions for further developing production level access-aware THP > > solutions have followed. Most of the discussions were made in private, though > > Asier recently proposed yet another approach [2] on the mailing list. As a > > result, we collected interesting challenges and ideas for the production level > > data access-aware THP. Some of the ideas are not yet public, could be > > controversial, and missing important things that more eyeballs can find. I > > want to discuss those in LSF/MM/BPF to get more ideas and make high level > > community alignments for next steps. > > > > [1] https://assets.amazon.science/b7/2b/ce53222247739b174f2b54498d1a/daos-data-access-aware-operating-system.pdf > > [2] https://lore.kernel.org/20260202145650.1795854-1-gutierrez.asier@huawei-partners.com > > > > > > Thanks, > > SJ > > > > Sent using hkml (https://github.com/sjp38/hackermail) Sent using hkml (https://github.com/sjp38/hackermail)