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 X-Spam-Level: X-Spam-Status: No, score=-5.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1723EC33CB3 for ; Tue, 28 Jan 2020 16:06:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D3F5024681 for ; Tue, 28 Jan 2020 16:06:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="P9nQR7VG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726320AbgA1QGn (ORCPT ); Tue, 28 Jan 2020 11:06:43 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:59622 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726107AbgA1QGn (ORCPT ); Tue, 28 Jan 2020 11:06:43 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: Content-Type:In-Reply-To:MIME-Version:Date:Message-ID:From:References:Cc:To: Subject:Sender:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=TC1JXRmVCDpfoX8tpOB7oJ8bDjUGxHzn4aFxhrwd/mc=; b=P9nQR7VG+b+ZF6H9cPXgLOYeZ k2bJEqsVznKzChQkk+U189Ob58LBOrI5q1BqGdqKfD4zPUkB5ELezs0FnqifPi3LiGfJUZGZkHzFB OdmjLsGhkWeaKVm3FM53fSZlu5tO62BsohOjwnCytMjzG3ECRYMKENlK+P0dvQ2dMC/5eEdckLTza naO3+5yPhpuXOLaueebGOuKgczLqDiXeX2O2GApmpUOJXspJoJrvHerNy4YyYVIIAeduvswtJIHJi c37+hgex0LKpF2eYd3v8Y8JRL3VCgFMfaxvY9pWsocfuCLH8bVc3IPVeq8ga/blLVgMDQneTwHiPf M3iyN19ZA==; Received: from [2601:1c0:6280:3f0::ed68] by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1iwTNw-0001bi-FA; Tue, 28 Jan 2020 16:06:40 +0000 Subject: Re: [PATCH v2 1/9] mm: Introduce Data Access MONitor (DAMON) To: sjpark@amazon.com, akpm@linux-foundation.org Cc: SeongJae Park , sj38.park@gmail.com, acme@kernel.org, amit@kernel.org, brendan.d.gregg@gmail.com, corbet@lwn.net, dwmw@amazon.com, mgorman@suse.de, rostedt@goodmis.org, kirill@shutemov.name, brendanhiggins@google.com, colin.king@canonical.com, minchan@kernel.org, vdavydov.dev@gmail.com, vdavydov@parallels.com, linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org References: <20200128085742.14566-1-sjpark@amazon.com> <20200128085742.14566-2-sjpark@amazon.com> From: Randy Dunlap Message-ID: <95f6d1e3-7052-252e-1c29-f320e84df302@infradead.org> Date: Tue, 28 Jan 2020 08:06:38 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: <20200128085742.14566-2-sjpark@amazon.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 1/28/20 12:57 AM, sjpark@amazon.com wrote: > diff --git a/mm/Kconfig b/mm/Kconfig > index ab80933be65f..144fb916aa8b 100644 > --- a/mm/Kconfig > +++ b/mm/Kconfig > @@ -739,4 +739,16 @@ config ARCH_HAS_HUGEPD > config MAPPING_DIRTY_HELPERS > bool > > +config DAMON > + tristate "Data Access Monitor" > + depends on MMU > + default y Might be lightweight but still should not default to 'y'. > + help > + Provides data access monitoring. > + > + DAMON is a kernel module that allows users to monitor the actual > + memory access pattern of specific user-space processes. It aims to > + be 1) accurate enough to be useful for performance-centric domains, > + and 2) sufficiently light-weight so that it can be applied online. > + > endmenu thanks. -- ~Randy