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 DE7F1C433F5 for ; Wed, 16 Feb 2022 08:53:07 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 5BE836B0078; Wed, 16 Feb 2022 03:53:07 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 56E4F6B007B; Wed, 16 Feb 2022 03:53:07 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 45D466B007D; Wed, 16 Feb 2022 03:53:07 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0142.hostedemail.com [216.40.44.142]) by kanga.kvack.org (Postfix) with ESMTP id 361E06B0078 for ; Wed, 16 Feb 2022 03:53:07 -0500 (EST) Received: from smtpin15.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id E86B491ACD for ; Wed, 16 Feb 2022 08:53:06 +0000 (UTC) X-FDA: 79148028372.15.EF9009C Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by imf22.hostedemail.com (Postfix) with ESMTP id 1F1BEC0005 for ; Wed, 16 Feb 2022 08:53:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1645001586; x=1676537586; h=from:to:cc:subject:references:date:in-reply-to: message-id:mime-version; bh=DvOAqye5C0k2L5I3hLstqAifXcVguIoWg4AYW46eqa4=; b=iPpdV7y5Xkh4nvFTQijbYgLADobzr/Z+2k7JA8BPFk5n7QTG94Y3lhDo sPLyojqMTCaTwUEfcBHu2ha8OP8UIGB1M2JXjrUI+Vy326vuWwkfS8v1l fUINrnGcW5HorX5oO8wgs0JXHCGQGdYecZL/3Bmdn6W7RFGCo9fQ3j2k9 JA2njHvRQatG7iREZAYj4mtYsbdBw0z1vwdhcCllT1KtTNqEphUj0nIOx vklt0trZt3PP8VJkpZYXFDhDDxJqoFki+Trb8Gb11m+rUvNEBR3mSCQAW vVI1E+MuYT/bkxNVuwSvs9+or65rX37q2rXqRaGvk8o3GA62VdIZeogCm A==; X-IronPort-AV: E=McAfee;i="6200,9189,10259"; a="250756739" X-IronPort-AV: E=Sophos;i="5.88,373,1635231600"; d="scan'208";a="250756739" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Feb 2022 00:53:04 -0800 X-IronPort-AV: E=Sophos;i="5.88,373,1635231600"; d="scan'208";a="544811272" Received: from yhuang6-desk2.sh.intel.com (HELO yhuang6-desk2.ccr.corp.intel.com) ([10.239.13.11]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Feb 2022 00:53:00 -0800 From: "Huang, Ying" To: Oscar Salvador Cc: Peter Zijlstra , Mel Gorman , Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Feng Tang , Yang Shi , Baolin Wang , Johannes Weiner , Michal Hocko , Rik van Riel , Dave Hansen , Zi Yan , Wei Xu , Shakeel Butt , zhongjiang-ali Subject: Re: [PATCH -V12 1/3] NUMA Balancing: add page promotion counter References: <20220216073815.2505536-1-ying.huang@intel.com> <20220216073815.2505536-2-ying.huang@intel.com> Date: Wed, 16 Feb 2022 16:52:59 +0800 In-Reply-To: (Oscar Salvador's message of "Wed, 16 Feb 2022 09:49:02 +0100") Message-ID: <87sfsj9or8.fsf@yhuang6-desk2.ccr.corp.intel.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=ascii X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 1F1BEC0005 X-Stat-Signature: 7e8htbbza7rnfm4weocus5h415ztcm75 X-Rspam-User: Authentication-Results: imf22.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=iPpdV7y5; spf=none (imf22.hostedemail.com: domain of ying.huang@intel.com has no SPF policy when checking 192.55.52.115) smtp.mailfrom=ying.huang@intel.com; dmarc=pass (policy=none) header.from=intel.com X-HE-Tag: 1645001585-632171 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: Oscar Salvador writes: > On Wed, Feb 16, 2022 at 03:38:13PM +0800, Huang Ying wrote: >> In a system with multiple memory types, e.g. DRAM and PMEM, the CPU >> and DRAM in one socket will be put in one NUMA node as before, while >> the PMEM will be put in another NUMA node as described in the >> description of the commit c221c0b0308f ("device-dax: "Hotplug" >> persistent memory for use like normal RAM"). So, the NUMA balancing >> mechanism will identify all PMEM accesses as remote access and try to >> promote the PMEM pages to DRAM. >> >> To distinguish the number of the inter-type promoted pages from that >> of the inter-socket migrated pages. A new vmstat count is added. The >> counter is per-node (count in the target node). So this can be used >> to identify promotion imbalance among the NUMA nodes. >> >> Signed-off-by: "Huang, Ying" >> Reviewed-by: Yang Shi >> Tested-by: Baolin Wang >> Reviewed-by: Baolin Wang >> Acked-by: Johannes Weiner >> Cc: Andrew Morton >> Cc: Michal Hocko >> Cc: Rik van Riel >> Cc: Mel Gorman >> Cc: Peter Zijlstra >> Cc: Dave Hansen >> Cc: Zi Yan >> Cc: Wei Xu >> Cc: osalvador >> Cc: Shakeel Butt >> Cc: zhongjiang-ali >> Cc: linux-kernel@vger.kernel.org >> Cc: linux-mm@kvack.org >> --- > ... > >> @@ -2072,6 +2072,7 @@ int migrate_misplaced_page(struct page *page, struct vm_area_struct *vma, >> pg_data_t *pgdat = NODE_DATA(node); >> int isolated; >> int nr_remaining; >> + int nr_succeeded; > > I think we should make this consistent and make it "unsigned int". > That is what migrate_pages() expects, and what the other caller using > nr_succeeded (demote_page_list()) already uses. > Unless there is a strong reason not to do so. Yes. Will do that in the next version. > Reviewed-by: Oscar Salvador Thanks! Best Regards, Huang, Ying