From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id E1410C433F5 for ; Tue, 22 Feb 2022 09:53:12 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 59F988D0003; Tue, 22 Feb 2022 04:53:12 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 54F9B8D0001; Tue, 22 Feb 2022 04:53:12 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 417968D0003; Tue, 22 Feb 2022 04:53:12 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0035.hostedemail.com [216.40.44.35]) by kanga.kvack.org (Postfix) with ESMTP id 32F468D0001 for ; Tue, 22 Feb 2022 04:53:12 -0500 (EST) Received: from smtpin29.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id DA4F1181CB2B5 for ; Tue, 22 Feb 2022 09:53:11 +0000 (UTC) X-FDA: 79169952582.29.6EE5D62 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by imf31.hostedemail.com (Postfix) with ESMTP id 4975E20011 for ; Tue, 22 Feb 2022 09:53:11 +0000 (UTC) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 7EB71B81975; Tue, 22 Feb 2022 09:53:09 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B471AC340E8; Tue, 22 Feb 2022 09:53:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1645523588; bh=dcLPqQqzFfwhFwJ9Kn/RubyJyNfK8yswScv0W6K2bpc=; h=From:To:Cc:Subject:Date:In-Reply-To:From; b=CqexYHz+BllH8K7Fc97pdhI+aS+BB4l4VG/ur/7rHWWW82c5F5KntSVsGV6h7oRrI WhAMIW1hnkD5gai7s9k6PfuMgElbaf2s5ELrUgQZW/TxmLc5tdJ5O3cPufdr2ppBNH LjJ5lfLwvnQ6mDVZzGLcX2H288n9FxCvC51hjnhvs7PKiGNgQAvw2KJ5uIXZ2Yfnk6 XHg+GIMuzKeODORR4nZycBCzc8du9e9aoOPQanBb1QVF1doPEOzHgoJf1dXNtKYBX5 VyDu7z+V/hLgtJPxxXqr48MXzB2ALbYVlK/GVsdYc6n7/CgrTRTs7IcBPPdnTMU0ad T469gBrvdu45A== From: SeongJae Park To: Jonghyeon Kim Cc: akpm@linux-foundation.org, Jonathan.Cameron@Huawei.com, amit@kernel.org, benh@kernel.crashing.org, corbet@lwn.net, david@redhat.com, dwmw@amazon.com, elver@google.com, foersleo@amazon.de, gthelen@google.com, markubo@amazon.de, rientjes@google.com, shakeelb@google.com, shuah@kernel.org, linux-damon@amazon.com, linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH v1 0/3] Rebase DAMON_RECALIM for NUMA system Date: Tue, 22 Feb 2022 09:53:02 +0000 Message-Id: <20220222095302.7859-1-sj@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220218102611.31895-1-tome01@ajou.ac.kr> X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 4975E20011 X-Stat-Signature: 4c4e4fuampyr36i3qxmwrizo1hakuiaq Authentication-Results: imf31.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=CqexYHz+; spf=pass (imf31.hostedemail.com: domain of sj@kernel.org designates 145.40.68.75 as permitted sender) smtp.mailfrom=sj@kernel.org; dmarc=pass (policy=none) header.from=kernel.org X-Rspam-User: X-HE-Tag: 1645523591-312366 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000007, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hello Jonghyeon, On Fri, 18 Feb 2022 19:26:08 +0900 Jonghyeon Kim wrote: > > Current DAMON_RECALIM is not compatible with the NUMA memory system. To > proactively reclaim memory, DAMON_RECLAIM kernel thread(kdamond) has to wake up > before kswapd does reclaim memory. However, the current watermark for proactive > reclamation is based on entire system free memory. So, though the one memory > node is fully used, kdamond is not waked up. > > These patches clarify watermarks of DAMOS and enable monitoring per NUMA node > proactive reclamation on DAMON_RECLAIM. The high level concept of this patchset looks good to me. Nevertheless, maybe there is some rooms for improvement. I left some comments on patches. Thanks, SJ > > Jonghyeon Kim (3): > mm/damon: Rebase damos watermarks for NUMA systems > mm/damon/core: Add damon_start_one() > mm/damon/reclaim: Add per NUMA node proactive reclamation by > DAMON_RECLAIM. > > include/linux/damon.h | 3 + > mm/damon/core.c | 39 +++++++++-- > mm/damon/reclaim.c | 147 ++++++++++++++++++++++++++++++------------ > 3 files changed, 140 insertions(+), 49 deletions(-) > > -- > 2.17.1