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=-18.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=ham 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 330C1C433E0 for ; Sun, 31 Jan 2021 01:20:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0A57A64E13 for ; Sun, 31 Jan 2021 01:20:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232384AbhAaBUM (ORCPT ); Sat, 30 Jan 2021 20:20:12 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35460 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230168AbhAaBUL (ORCPT ); Sat, 30 Jan 2021 20:20:11 -0500 Received: from mail-pj1-x1030.google.com (mail-pj1-x1030.google.com [IPv6:2607:f8b0:4864:20::1030]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E67C6C061573 for ; Sat, 30 Jan 2021 17:19:30 -0800 (PST) Received: by mail-pj1-x1030.google.com with SMTP id lw17so7987342pjb.0 for ; Sat, 30 Jan 2021 17:19:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:from:to:cc:subject:in-reply-to:message-id:references :mime-version; bh=r4XQvxNNoGLJfrMyiuidxyu3QDem5+Pe8JibIIsychI=; b=P/3zdPV7ZT34vyrVy9B+HRiisfmQe69UckhlSgox8Jjvi7v+s7v9FL8J3v4m/P8Qjr HREpcNpk9ED09Pg0lPfOip+Nn04HDhL4OT1XUpiKAjZbNngEOu+AxLb7Ipx3BcCdbaB2 exEWJ2tQ09UuLW8I6P9rHwWck/pJ+47qJL4Iyt0vEY2Hxq9Cce4HMDtwqX2hRUhnONGL 9MWiKo7IbgzjLsiIvO7D7AiSaHk6LQ1J+qxEfZn0ya18RR0tw3j19rpdCW1wid/Kvml5 Y4cLdUa70OB9seYgTJh6HiHncHHuQFro+OJsZ5yBNxEKYoyfJy0gx4c68AGr8qldVKZF kfkQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:in-reply-to:message-id :references:mime-version; bh=r4XQvxNNoGLJfrMyiuidxyu3QDem5+Pe8JibIIsychI=; b=sB7RmpXNZJq0pw0ouUrlRBw4d1pxESwaNl7WDmG9tkyWYdN2Ue0xupinPd6X2mZg+h U7wdLl+D9PlC62OV2cq8jjquV5x7RbWCGb/lQZxU6u2FYoVwwzHgl0nrFMWx7rxDLOtb 7+7CWGOh5gAZSMHlu4AQPJA+VOzJLO0SVicon6FDJULw6prluqeq+R887aMixuYWs3u0 8IKZNjd3O7DngBrk1nHkhcxHdltbL23/rzHRRASKW981uQN79mImJ1zOiOgA9GaQ+rdf NGXmhaNyTc0D6SxZHEyaB2EtmHPFNAt4ntKhVWMJNmUTjz8H9A6ndt0dlvDJ7wBkY5Cx LkLQ== X-Gm-Message-State: AOAM533uzT7qDRP8/Yz/1R1TUCYPuzCeZhOEKO0+Vs5A2202F3Xsp/H/ /0b7OPuqHKC15xgtiWskwtIALkqazGnbLw== X-Google-Smtp-Source: ABdhPJw9CHRQ+nGcktmizYwkcUqgqyeIAUs422wBi7+OoHVvlsWsk3hXAtOrh+jpwhAx6aYzTFTyRA== X-Received: by 2002:a17:90a:5410:: with SMTP id z16mr10755167pjh.110.1612055970357; Sat, 30 Jan 2021 17:19:30 -0800 (PST) Received: from [2620:15c:17:3:4a0f:cfff:fe51:6667] ([2620:15c:17:3:4a0f:cfff:fe51:6667]) by smtp.gmail.com with ESMTPSA id y5sm13468278pfq.96.2021.01.30.17.19.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 30 Jan 2021 17:19:29 -0800 (PST) Date: Sat, 30 Jan 2021 17:19:28 -0800 (PST) From: David Rientjes To: Dave Hansen cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, yang.shi@linux.alibaba.com, ying.huang@intel.com, dan.j.williams@intel.com, david@redhat.com, osalvador@suse.de Subject: Re: [RFC][PATCH 04/13] mm/numa: node demotion data structure and lookup In-Reply-To: <20210126003419.43281680@viggo.jf.intel.com> Message-ID: <6115c2e-99b7-75f7-f0dd-bc44e69e21e7@google.com> References: <20210126003411.2AC51464@viggo.jf.intel.com> <20210126003419.43281680@viggo.jf.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 25 Jan 2021, Dave Hansen wrote: > diff -puN mm/migrate.c~0006-node-Define-and-export-memory-migration-path mm/migrate.c > --- a/mm/migrate.c~0006-node-Define-and-export-memory-migration-path 2021-01-25 16:23:09.553866709 -0800 > +++ b/mm/migrate.c 2021-01-25 16:23:09.558866709 -0800 > @@ -1161,6 +1161,22 @@ out: > return rc; > } > > +static int node_demotion[MAX_NUMNODES] = {[0 ... MAX_NUMNODES - 1] = NUMA_NO_NODE}; __read_mostly? > + > +/** > + * next_demotion_node() - Get the next node in the demotion path > + * @node: The starting node to lookup the next node > + * > + * @returns: node id for next memory node in the demotion path hierarchy > + * from @node; NUMA_NO_NODE if @node is terminal. This does not keep > + * @node online or guarantee that it *continues* to be the next demotion > + * target. > + */ > +int next_demotion_node(int node) > +{ > + return node_demotion[node]; > +} > + > /* > * Obtain the lock on page, remove all ptes and migrate the page > * to the newly allocated page in newpage. > _ > 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=-18.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=ham 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 A2C6FC433E0 for ; Sun, 31 Jan 2021 01:19:33 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2B94564E13 for ; 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Sat, 30 Jan 2021 17:19:29 -0800 (PST) Date: Sat, 30 Jan 2021 17:19:28 -0800 (PST) From: David Rientjes To: Dave Hansen cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, yang.shi@linux.alibaba.com, ying.huang@intel.com, dan.j.williams@intel.com, david@redhat.com, osalvador@suse.de Subject: Re: [RFC][PATCH 04/13] mm/numa: node demotion data structure and lookup In-Reply-To: <20210126003419.43281680@viggo.jf.intel.com> Message-ID: <6115c2e-99b7-75f7-f0dd-bc44e69e21e7@google.com> References: <20210126003411.2AC51464@viggo.jf.intel.com> <20210126003419.43281680@viggo.jf.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII 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: On Mon, 25 Jan 2021, Dave Hansen wrote: > diff -puN mm/migrate.c~0006-node-Define-and-export-memory-migration-path mm/migrate.c > --- a/mm/migrate.c~0006-node-Define-and-export-memory-migration-path 2021-01-25 16:23:09.553866709 -0800 > +++ b/mm/migrate.c 2021-01-25 16:23:09.558866709 -0800 > @@ -1161,6 +1161,22 @@ out: > return rc; > } > > +static int node_demotion[MAX_NUMNODES] = {[0 ... MAX_NUMNODES - 1] = NUMA_NO_NODE}; __read_mostly? > + > +/** > + * next_demotion_node() - Get the next node in the demotion path > + * @node: The starting node to lookup the next node > + * > + * @returns: node id for next memory node in the demotion path hierarchy > + * from @node; NUMA_NO_NODE if @node is terminal. This does not keep > + * @node online or guarantee that it *continues* to be the next demotion > + * target. > + */ > +int next_demotion_node(int node) > +{ > + return node_demotion[node]; > +} > + > /* > * Obtain the lock on page, remove all ptes and migrate the page > * to the newly allocated page in newpage. > _ >