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 85CC0C67861 for ; Mon, 8 Apr 2024 07:38:26 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 079026B0087; Mon, 8 Apr 2024 03:38:26 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 028DB6B0088; Mon, 8 Apr 2024 03:38:25 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D96C66B008C; Mon, 8 Apr 2024 03:38:25 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id BA39A6B0087 for ; Mon, 8 Apr 2024 03:38:25 -0400 (EDT) Received: from smtpin13.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 6D0B216075A for ; Mon, 8 Apr 2024 07:38:25 +0000 (UTC) X-FDA: 81985561770.13.5D8A246 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.223.131]) by imf17.hostedemail.com (Postfix) with ESMTP id F28A04000F for ; Mon, 8 Apr 2024 07:38:22 +0000 (UTC) Authentication-Results: imf17.hostedemail.com; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=fBn2188k; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=5bBQXTwO; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=fBn2188k; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=5bBQXTwO; dmarc=none; spf=pass (imf17.hostedemail.com: domain of vbabka@suse.cz designates 195.135.223.131 as permitted sender) smtp.mailfrom=vbabka@suse.cz ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1712561903; a=rsa-sha256; cv=none; b=cw7Ypnzwx1n97HxNRlREVx74+PRd4uErc2O+cPOAEaFSG+nZCNkErwLFotVeOndg8JFbup AuZLNfvp3EROWGoUXAweNNduUw4lCldXT8+4swYWaP67nSY220Du91cwd2H4Lq+81Pczwg ZGU91VKC3EIndSW229tpOBRu/MAs3U4= ARC-Authentication-Results: i=1; imf17.hostedemail.com; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=fBn2188k; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=5bBQXTwO; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=fBn2188k; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=5bBQXTwO; dmarc=none; spf=pass (imf17.hostedemail.com: domain of vbabka@suse.cz designates 195.135.223.131 as permitted sender) smtp.mailfrom=vbabka@suse.cz ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1712561903; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=yDXYZ+HVnjL8LE33ELw6Ev7L7ptFfBFSiqjfmx+pLTk=; b=544oS2lOjuqtkqxxKNQIXaR0c5PyxwoMeMQjPA4JAOnljydMQHZihgXMZbNb23j5qN4Dny 7Y6VwhCCP5NVguSjkNY2Jtg1Tvw3jxuvkKaLuvXtpo2iCQ/tv+WA3GQfXgjeuQ3wdYQdcE jIACRJQWtn+N+pJmdScNXEpa0RYX7kU= Received: from imap1.dmz-prg2.suse.org (imap1.dmz-prg2.suse.org [10.150.64.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 5D1881FDD9; Mon, 8 Apr 2024 07:38:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1712561901; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=yDXYZ+HVnjL8LE33ELw6Ev7L7ptFfBFSiqjfmx+pLTk=; b=fBn2188kDItamcKZUw6GNFQi7zDvajXvdOuQ/G+qSX7jQGwSep87thmPdX7OtGF3ASS0UD ADSf9RNosB49Wou8xYnsqGkOIAU+AGCOBbniGxg72YiFK7Wey942WDa6z1KO5H7XvJ2fFy QfpzapNUfSUyz5C5FpwwdUTxfc8mpZc= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1712561901; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=yDXYZ+HVnjL8LE33ELw6Ev7L7ptFfBFSiqjfmx+pLTk=; b=5bBQXTwOVkFCX54Tjtn+j1d+9yqYRoh8cSYD2edzGBtZ9CRMi3UDCad+i1ch+61upSlXyE +IO7ImUZ+FJO7hDA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1712561901; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=yDXYZ+HVnjL8LE33ELw6Ev7L7ptFfBFSiqjfmx+pLTk=; b=fBn2188kDItamcKZUw6GNFQi7zDvajXvdOuQ/G+qSX7jQGwSep87thmPdX7OtGF3ASS0UD ADSf9RNosB49Wou8xYnsqGkOIAU+AGCOBbniGxg72YiFK7Wey942WDa6z1KO5H7XvJ2fFy QfpzapNUfSUyz5C5FpwwdUTxfc8mpZc= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1712561901; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=yDXYZ+HVnjL8LE33ELw6Ev7L7ptFfBFSiqjfmx+pLTk=; b=5bBQXTwOVkFCX54Tjtn+j1d+9yqYRoh8cSYD2edzGBtZ9CRMi3UDCad+i1ch+61upSlXyE +IO7ImUZ+FJO7hDA== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 422C0137D4; Mon, 8 Apr 2024 07:38:21 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id lTN0D+2eE2bqWQAAD6G6ig (envelope-from ); Mon, 08 Apr 2024 07:38:21 +0000 Message-ID: Date: Mon, 8 Apr 2024 09:38:20 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 10/10] mm: page_alloc: consolidate free page accounting Content-Language: en-US To: Baolin Wang , Johannes Weiner , Andrew Morton Cc: Mel Gorman , Zi Yan , "Huang, Ying" , David Hildenbrand , linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20240320180429.678181-1-hannes@cmpxchg.org> <20240320180429.678181-11-hannes@cmpxchg.org> <7b3b7f2e-7109-4e72-b1cf-259cb56f3629@linux.alibaba.com> From: Vlastimil Babka Autocrypt: addr=vbabka@suse.cz; keydata= xsFNBFZdmxYBEADsw/SiUSjB0dM+vSh95UkgcHjzEVBlby/Fg+g42O7LAEkCYXi/vvq31JTB KxRWDHX0R2tgpFDXHnzZcQywawu8eSq0LxzxFNYMvtB7sV1pxYwej2qx9B75qW2plBs+7+YB 87tMFA+u+L4Z5xAzIimfLD5EKC56kJ1CsXlM8S/LHcmdD9Ctkn3trYDNnat0eoAcfPIP2OZ+ 9oe9IF/R28zmh0ifLXyJQQz5ofdj4bPf8ecEW0rhcqHfTD8k4yK0xxt3xW+6Exqp9n9bydiy tcSAw/TahjW6yrA+6JhSBv1v2tIm+itQc073zjSX8OFL51qQVzRFr7H2UQG33lw2QrvHRXqD Ot7ViKam7v0Ho9wEWiQOOZlHItOOXFphWb2yq3nzrKe45oWoSgkxKb97MVsQ+q2SYjJRBBH4 8qKhphADYxkIP6yut/eaj9ImvRUZZRi0DTc8xfnvHGTjKbJzC2xpFcY0DQbZzuwsIZ8OPJCc LM4S7mT25NE5kUTG/TKQCk922vRdGVMoLA7dIQrgXnRXtyT61sg8PG4wcfOnuWf8577aXP1x 6mzw3/jh3F+oSBHb/GcLC7mvWreJifUL2gEdssGfXhGWBo6zLS3qhgtwjay0Jl+kza1lo+Cv BB2T79D4WGdDuVa4eOrQ02TxqGN7G0Biz5ZLRSFzQSQwLn8fbwARAQABzSBWbGFzdGltaWwg QmFia2EgPHZiYWJrYUBzdXNlLmN6PsLBlAQTAQoAPgIbAwULCQgHAwUVCgkICwUWAgMBAAIe AQIXgBYhBKlA1DSZLC6OmRA9UCJPp+fMgqZkBQJkBREIBQkRadznAAoJECJPp+fMgqZkNxIQ ALZRqwdUGzqL2aeSavbum/VF/+td+nZfuH0xeWiO2w8mG0+nPd5j9ujYeHcUP1edE7uQrjOC Gs9sm8+W1xYnbClMJTsXiAV88D2btFUdU1mCXURAL9wWZ8Jsmz5ZH2V6AUszvNezsS/VIT87 AmTtj31TLDGwdxaZTSYLwAOOOtyqafOEq+gJB30RxTRE3h3G1zpO7OM9K6ysLdAlwAGYWgJJ V4JqGsQ/lyEtxxFpUCjb5Pztp7cQxhlkil0oBYHkudiG8j1U3DG8iC6rnB4yJaLphKx57NuQ PIY0Bccg+r9gIQ4XeSK2PQhdXdy3UWBr913ZQ9AI2usid3s5vabo4iBvpJNFLgUmxFnr73SJ KsRh/2OBsg1XXF/wRQGBO9vRuJUAbnaIVcmGOUogdBVS9Sun/Sy4GNA++KtFZK95U7J417/J Hub2xV6Ehc7UGW6fIvIQmzJ3zaTEfuriU1P8ayfddrAgZb25JnOW7L1zdYL8rXiezOyYZ8Fm ZyXjzWdO0RpxcUEp6GsJr11Bc4F3aae9OZtwtLL/jxc7y6pUugB00PodgnQ6CMcfR/HjXlae h2VS3zl9+tQWHu6s1R58t5BuMS2FNA58wU/IazImc/ZQA+slDBfhRDGYlExjg19UXWe/gMcl De3P1kxYPgZdGE2eZpRLIbt+rYnqQKy8UxlszsBNBFsZNTUBCACfQfpSsWJZyi+SHoRdVyX5 J6rI7okc4+b571a7RXD5UhS9dlVRVVAtrU9ANSLqPTQKGVxHrqD39XSw8hxK61pw8p90pg4G /N3iuWEvyt+t0SxDDkClnGsDyRhlUyEWYFEoBrrCizbmahOUwqkJbNMfzj5Y7n7OIJOxNRkB IBOjPdF26dMP69BwePQao1M8Acrrex9sAHYjQGyVmReRjVEtv9iG4DoTsnIR3amKVk6si4Ea X/mrapJqSCcBUVYUFH8M7bsm4CSxier5ofy8jTEa/CfvkqpKThTMCQPNZKY7hke5qEq1CBk2 wxhX48ZrJEFf1v3NuV3OimgsF2odzieNABEBAAHCwXwEGAEKACYCGwwWIQSpQNQ0mSwujpkQ PVAiT6fnzIKmZAUCZAUSmwUJDK5EZgAKCRAiT6fnzIKmZOJGEACOKABgo9wJXsbWhGWYO7mD 8R8mUyJHqbvaz+yTLnvRwfe/VwafFfDMx5GYVYzMY9TWpA8psFTKTUIIQmx2scYsRBUwm5VI EurRWKqENcDRjyo+ol59j0FViYysjQQeobXBDDE31t5SBg++veI6tXfpco/UiKEsDswL1WAr tEAZaruo7254TyH+gydURl2wJuzo/aZ7Y7PpqaODbYv727Dvm5eX64HCyyAH0s6sOCyGF5/p eIhrOn24oBf67KtdAN3H9JoFNUVTYJc1VJU3R1JtVdgwEdr+NEciEfYl0O19VpLE/PZxP4wX PWnhf5WjdoNI1Xec+RcJ5p/pSel0jnvBX8L2cmniYnmI883NhtGZsEWj++wyKiS4NranDFlA HdDM3b4lUth1pTtABKQ1YuTvehj7EfoWD3bv9kuGZGPrAeFNiHPdOT7DaXKeHpW9homgtBxj 8aX/UkSvEGJKUEbFL9cVa5tzyialGkSiZJNkWgeHe+jEcfRT6pJZOJidSCdzvJpbdJmm+eED w9XOLH1IIWh7RURU7G1iOfEfmImFeC3cbbS73LQEFGe1urxvIH5K/7vX+FkNcr9ujwWuPE9b 1C2o4i/yZPLXIVy387EjA6GZMqvQUFuSTs/GeBcv0NjIQi8867H3uLjz+mQy63fAitsDwLmR EP+ylKVEKb0Q2A== In-Reply-To: <7b3b7f2e-7109-4e72-b1cf-259cb56f3629@linux.alibaba.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: F28A04000F X-Stat-Signature: bm6kynkmse7agmtu5br6wjet5ex3e77n X-HE-Tag: 1712561902-592331 X-HE-Meta: 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 TNp7of1T J+P+KbHXrpBFUDG/MyShUF41O3Pcp5ydNVMd5ZYsGegNCukFilGG/EDselvLrCUwL76aboQ2rlFPGr38sImI8qHiDvxWqjfMBY1A71/ZU6sMsxgQFcMwj0dz3D93NI6IRvq8eQUIppYsLFv/kT864rDdEAk9qplKkXoQn6yz5eH22fED5KDWB19QIxDntldNgLO5/+7M7CUhkpbwZU3AXJ4Q/Yqlf+JPgEPQ/fvNZN8LsslYGCAJBFuXrTUEQz23k8LATFrrWjrxMBgbPB4iIQ3Hxu+edyvAIm0hqrvN+ESwIXYV7Jxkgb1y8Dg== 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: List-Subscribe: List-Unsubscribe: On 4/7/24 12:19 PM, Baolin Wang wrote: > On 2024/3/21 02:02, Johannes Weiner wrote: >> >> + account_freepages(page, zone, 1 << order, migratetype); >> + >> while (order < MAX_PAGE_ORDER) { >> - if (compaction_capture(capc, page, order, migratetype)) { >> - __mod_zone_freepage_state(zone, -(1 << order), >> - migratetype); >> + int buddy_mt = migratetype; >> + >> + if (compaction_capture(capc, page, order, migratetype)) >> return; >> - } > > IIUC, if the released page is captured by compaction, then the > statistics for free pages should be correspondingly decreased, > otherwise, there will be a slight regression for my thpcompact benchmark. > > thpcompact Percentage Faults Huge > k6.9-rc2-base base + patch10 + 2 fixes > Percentage huge-1 78.18 ( 0.00%) 71.92 ( -8.01%) > Percentage huge-3 86.70 ( 0.00%) 86.07 ( -0.73%) > Percentage huge-5 90.26 ( 0.00%) 78.02 ( -13.57%) > Percentage huge-7 92.34 ( 0.00%) 78.67 ( -14.81%) > Percentage huge-12 91.18 ( 0.00%) 81.04 ( -11.12%) > Percentage huge-18 89.00 ( 0.00%) 79.57 ( -10.60%) > Percentage huge-24 90.52 ( 0.00%) 80.07 ( -11.54%) > Percentage huge-30 94.44 ( 0.00%) 96.28 ( 1.95%) > Percentage huge-32 93.09 ( 0.00%) 99.39 ( 6.77%) > > I add below fix based on your fix 2, then the thpcompact Percentage > looks good. How do you think for the fix? Yeah another well spotted, thanks. "slight regression" is an understatement, this affects not just a "statistics" but very important counter NR_FREE_PAGES which IIUC would eventually become larger than reality, make the watermark checks false positive and result in depleted reserves etc etc. Actually wondering why we're not seeing -next failures already (or maybe I just haven't noticed). > diff --git a/mm/page_alloc.c b/mm/page_alloc.c > index 8330c5c2de6b..2facf844ef84 100644 > --- a/mm/page_alloc.c > +++ b/mm/page_alloc.c > @@ -805,8 +805,10 @@ static inline void __free_one_page(struct page *page, > while (order < MAX_PAGE_ORDER) { > int buddy_mt = migratetype; > > - if (compaction_capture(capc, page, order, migratetype)) > + if (compaction_capture(capc, page, order, migratetype)) { > + account_freepages(zone, -(1 << order), migratetype); > return; > + } > > buddy = find_buddy_page_pfn(page, pfn, order, &buddy_pfn); > if (!buddy) > > With my fix, the THP percentage looks better: > k6.9-rc2-base base + patch10 + 2 fixes + > my fix > Percentage huge-1 78.18 ( 0.00%) 82.83 ( 5.94%) > Percentage huge-3 86.70 ( 0.00%) 93.47 ( 7.81%) > Percentage huge-5 90.26 ( 0.00%) 94.73 ( 4.95%) > Percentage huge-7 92.34 ( 0.00%) 95.22 ( 3.12%) > Percentage huge-12 91.18 ( 0.00%) 92.40 ( 1.34%) > Percentage huge-18 89.00 ( 0.00%) 85.39 ( -4.06%) > Percentage huge-24 90.52 ( 0.00%) 94.70 ( 4.61%) > Percentage huge-30 94.44 ( 0.00%) 97.00 ( 2.71%) > Percentage huge-32 93.09 ( 0.00%) 92.87 ( -0.24%)