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 2DC7EC433F5 for ; Tue, 23 Nov 2021 08:37:08 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 903EB6B0071; Tue, 23 Nov 2021 03:36:52 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 8B3836B0072; Tue, 23 Nov 2021 03:36:52 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7A1F16B0073; Tue, 23 Nov 2021 03:36:52 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0007.hostedemail.com [216.40.44.7]) by kanga.kvack.org (Postfix) with ESMTP id 6F0666B0071 for ; Tue, 23 Nov 2021 03:36:52 -0500 (EST) Received: from smtpin26.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 3D06B2B35E for ; Tue, 23 Nov 2021 08:36:42 +0000 (UTC) X-FDA: 78839539044.26.01845DC Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf06.hostedemail.com (Postfix) with ESMTP id 6D3BE801AB12 for ; Tue, 23 Nov 2021 08:36:40 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id 0D1036023E; Tue, 23 Nov 2021 08:36:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1637656600; bh=8IUk2wsIqhHjOKYTSkovqz/gy4LMPoLmcGPb/RWtyL0=; h=From:To:Cc:Subject:Date:In-Reply-To:From; b=pE1jnYGRnAoPijL3RZ2jXz1jQkUDvNlFpaPfiLer0TvyDtU045PYqWux5WRFke57+ qVRQ5sSfp2OmZS1w9El4RyvEYlNCUoH9XSJe6D6CQgMxekeH8jxb0vr//5cl+GHrWN ihlpVbD+xxUnVVKD7JA4T6qZZfEHcWS5hTi3DU5PqIQV65L8bPX9l1m/xLmZ8pwgnO fKkHBNh8rGdKOsA0od3w+Fjn4L9M7gLclG5v3Ji0cIYZFZvNXGjiQjZfjQvl3nEX+M Tvlcn12z8FK0uRTK79ttLwrrtKgPUnuMsYnV41tvhAPNzMcERc4tIIRxm9xbqNNuDV OHtxAG2PK9wpw== From: SeongJae Park To: Oleksandr Natalenko Cc: akpm@linux-foundation.org, SeongJae Park , 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: [PATCH 00/15] Introduce DAMON-based Proactive Reclamation Date: Tue, 23 Nov 2021 08:36:36 +0000 Message-Id: <20211123083636.5603-1-sj@kernel.org> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 In-Reply-To: <11868371.O9o76ZdvQC@natalenko.name> Content-Type: text/plain; charset=UTF-8 X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 6D3BE801AB12 X-Stat-Signature: 13zfctaub8x5hh1epu5p41tjyp5n3rzz Authentication-Results: imf06.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=pE1jnYGR; spf=pass (imf06.hostedemail.com: domain of sj@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=sj@kernel.org; dmarc=pass (policy=none) header.from=kernel.org X-HE-Tag: 1637656600-133243 Content-Transfer-Encoding: quoted-printable 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: Hello Oleksandr, On Sun, 21 Nov 2021 23:32:12 +0100 Oleksandr Natalenko wrote: > Hello. >=20 > On =C3=BAter=C3=BD 19. =C5=99=C3=ADjna 2021 17:07:16 CET SeongJae Park = wrote: > > In short, DAMON_RECLAIM with 50ms/s time quota and regions prioritiza= tion on > > v5.15-rc5 Linux kernel with ZRAM swap device achieves 38.58% memory s= aving > > with only 1.94% runtime overhead. For this, DAMON_RECLAIM consumes o= nly > > 4.97% of single CPU time. >=20 > While it really consumes little CPU time, is it fine for `kdamond.0` to= be in a=20 > D (uninterruptible sleep) state all the time while active, pushing load= avg=20 > over 1.0? Good point, this could confuse some users using loadavg. I will send a f= ix for this soon. Thanks, SJ >=20 > Thanks. >=20 > --=20 > Oleksandr Natalenko (post-factum) >=20