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 A7D9363D0; Thu, 7 Mar 2024 03:05:53 +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=1709780753; cv=none; b=Ryga7N7nEkvhrYIYM/olcU+IENjG7OXxogOXTlyD8YmJlhrHs3HWk7QYBGrVsnV273e82HpsvIv/qh93xR1Yf7gu6HaQArvEc9XE4ViNj2cxkR/WfkOVTtcIkwjNPqC1ePJ/b8jp0+CzIrWav7pH2bFjrStYD1StKVMVedsuTvk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709780753; c=relaxed/simple; bh=8ful7sN8c0CPBqZwFl7Swppe+T+Tso7XnELEfEKpEhQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=QPqyx/xuWQQkLVNi6x/ax3+/0H1Z9w0NYX67ck2PJAQFLTYueNyk+l474VaIlRaXe1+/sK7lnm2oW/VbemdK43/7zaA7aPSL8jNihd6Lnt+GUFCJVKjDfbvVGFgUz59dhH0ABuK0zCyDRczRhs+esL1QyiJXEqLKXQ6dxElDgGE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Y4xIBEcl; 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="Y4xIBEcl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C8F6DC43390; Thu, 7 Mar 2024 03:05:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1709780753; bh=8ful7sN8c0CPBqZwFl7Swppe+T+Tso7XnELEfEKpEhQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Y4xIBEclaYjge0kRl9J0ZEMfTN13SWxQ5od+q5AOqu7p+AF20i9NUe0E+fXws3Sft ytWNrxRH9CPQHMcSYGFG1Yv3LewMySjQ2DntCwDIAYl/3Ctbl0F2fBrWbAxhmo+XiY a4+oF+fKXDHI6EBIh0OeopGIdHTSU6rhOiXuFW2VrgCzBUvo18ugeBftvpT1KIKX0h gbeulnr82Jz2kQfJMbP4RuqlwmrLuCh0VCRCoWOwxdcTJtR46hWU8mT5GxzxXpkyXZ 2Gf6iu8XXkDXD5JF/HvmB8D9VMEnFkVGFH1FBP31xBEnkavdP74oqcM1Gb4UA/7Ss6 G/NFgoeUidnqw== From: SeongJae Park To: SeongJae Park Cc: Honggyu Kim , damon@lists.linux.dev, linux-mm@kvack.org, akpm@linux-foundation.org, apopple@nvidia.com, baolin.wang@linux.alibaba.com, dave.jiang@intel.com, hyeongtak.ji@sk.com, kernel_team@skhynix.com, linmiaohe@huawei.com, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, lizhijian@cn.fujitsu.com, mathieu.desnoyers@efficios.com, mhiramat@kernel.org, rakie.kim@sk.com, rostedt@goodmis.org, surenb@google.com, yangx.jy@fujitsu.com, ying.huang@intel.com, ziy@nvidia.com, 42.hyeyoo@gmail.com Subject: Re: [RFC PATCH v2 0/7] DAMON based 2-tier memory management for CXL memory Date: Wed, 6 Mar 2024 19:05:50 -0800 Message-Id: <20240307030550.47095-1-sj@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240227235121.153277-1-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 Hello, On Tue, 27 Feb 2024 15:51:20 -0800 SeongJae Park wrote: > On Mon, 26 Feb 2024 23:05:46 +0900 Honggyu Kim wrote: > > > There was an RFC IDEA "DAMOS-based Tiered-Memory Management" previously > > posted at [1]. > > > > It says there is no implementation of the demote/promote DAMOS action > > are made. This RFC is about its implementation for physical address > > space. [...] > Honggyu joined DAMON Beer/Coffee/Tea Chat[1] yesterday, and we discussed about > this patchset in high level. Sharing the summary here for open discussion. As > also discussed on the first version of this patchset[2], we want to make single > action for general page migration with minimum changes, but would like to keep > page level access re-check. We also agreed the previously proposed DAMOS > filter-based approach could make sense for the purpose. > > Because I was anyway planning making such DAMOS filter for not only > promotion/demotion but other types of DAMOS action, I will start developing the > page level access re-check results based DAMOS filter. Once the implementation > of the prototype is done, I will share the early implementation. Then, Honggyu > will adjust their implementation based on the filter, and run their tests again > and share the results. I just posted an RFC patchset for the page level access re-check DAMOS filter: https://lore.kernel.org/r/20240307030013.47041-1-sj@kernel.org I hope it to help you better understanding and testing the idea. > > [1] https://lore.kernel.org/damon/20220810225102.124459-1-sj@kernel.org/ > [2] https://lore.kernel.org/damon/20240118171756.80356-1-sj@kernel.org Thanks, SJ [...]