From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 09FB52C11FA; Wed, 11 Feb 2026 05:07:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770786452; cv=none; b=RA7ndrFlAJEAvptoxMF2XHQugTNsb/A2L3IhVVJLFefSaQ9gu+fuwfzLJ5l7dz3FPVwSOLQizHav4pE6xtz7unt1gzpHhMNYvEhQhUWT+T8yu3UvGMKHqB2/CIyq26AQ7JeoTyEZvddP9C06QMUGLn2v7jWXkQjEWm+3NYueV0w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770786452; c=relaxed/simple; bh=UTpjsZww6YPPiWFz55VMFdksp+RP1wddMHWtM/ylmIY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=OLxFFng+i7+LSb8lJXu5Ncn4TrDYQQJTG0VAXuZJ8787fk9bg2td36JhPadkt+vcGPYdHmKhPjUOujFCXKuh9zBKWxT46tVXn8bG8G2075oNd+1R6ExzWWyXTqqZ5heOwdKQsIhWY70nEHEd6p9lxNPEUHlhkbKsaOYw0K6w6EA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Yt4r16Bz; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Yt4r16Bz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7713DC4CEF7; Wed, 11 Feb 2026 05:07:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1770786451; bh=UTpjsZww6YPPiWFz55VMFdksp+RP1wddMHWtM/ylmIY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; 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: Precedence: bulk X-Mailing-List: damon@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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)