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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no 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 271D5CA9EA0 for ; Fri, 25 Oct 2019 11:19:08 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id DDACF2070B for ; Fri, 25 Oct 2019 11:19:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lca.pw header.i=@lca.pw header.b="Ml4IXHbo" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DDACF2070B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lca.pw Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 648966B0003; Fri, 25 Oct 2019 07:19:07 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 5FA176B0006; Fri, 25 Oct 2019 07:19:07 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 510C86B0007; Fri, 25 Oct 2019 07:19:07 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0081.hostedemail.com [216.40.44.81]) by kanga.kvack.org (Postfix) with ESMTP id 303CE6B0003 for ; Fri, 25 Oct 2019 07:19:07 -0400 (EDT) Received: from smtpin30.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with SMTP id 89DAF1818288D for ; Fri, 25 Oct 2019 11:19:06 +0000 (UTC) X-FDA: 76082060292.30.flock70_325d9afa6785c X-HE-Tag: flock70_325d9afa6785c X-Filterd-Recvd-Size: 4061 Received: from mail-qk1-f196.google.com (mail-qk1-f196.google.com [209.85.222.196]) by imf50.hostedemail.com (Postfix) with ESMTP for ; Fri, 25 Oct 2019 11:19:05 +0000 (UTC) Received: by mail-qk1-f196.google.com with SMTP id u184so1365122qkd.4 for ; Fri, 25 Oct 2019 04:19:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lca.pw; s=google; h=content-transfer-encoding:from:mime-version:subject:message-id:date :cc:to; bh=E9nwf1YnY9pgW+e3Ube7+XXgcr6xzGBKmokqCPeg0mE=; b=Ml4IXHboDAqwNWI0i/qzHerMfWI34df39mlOHYlModZhSVkgOb0DSm2OQajuHR+3AS puQCNAXeKUGSV4h1A1krXJmC3dajIbBkyY1J46X9jAOt7WXfJsYTdfC0jhZwqzaa017v g0O5utdk6/B3q5rEiLY50JOdWhwvPj8yDF4E4bLg3SkzeMt8gbBBAJFI9n88B/kwVyvI nqwrnjqJ1hxjM7cMqmLJ7L5Rkm0fY5AwB2xjAxu6GmTU1cALGRjBU60DIvIkdg/ixtWU 3lmKtGU2iGzY+fBau3KjBnygS2eYfLS0wUYVQi32Wns6AcTHvtkBsmNJzXl6dJw8VYNB aKjw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:content-transfer-encoding:from:mime-version :subject:message-id:date:cc:to; bh=E9nwf1YnY9pgW+e3Ube7+XXgcr6xzGBKmokqCPeg0mE=; b=K2SOFzxA/5mUhlvBdndyf8mZEurTki5E3mKWKsDGQork9Z+uqN7G6MBY/FppjprCw4 bTxg27wyq9VvxVbJ+Y7BqPp3Oe64fT/W059sGYmFqt6Tq2NUwX8P3M5tMwOYsPwgV9be FjZQ/kVL617C2S6tfkP3nXPsYn9QM/KOiCEODDC5tl5BVclVsGnX8xAU6gqFgo0dnzG5 rxNHKul4XJLL+lfEudVYykerNZDlXwXz3SXvzphydnACx861NU3/y2fs5MeBoHd6YWR4 6ChyFocb+3/5a1kr2bs3GPKcV//7D8wI2c2smOmDN7Ria/GxXSWS3fRvFPEi8B0AqZ+b eg3A== X-Gm-Message-State: APjAAAVrWTB3aydzVsJG2nvvhjPJyFyDgFXtm1BrYSo9Kh7gIXIM1QNN Lzld734lM9oi43H/XlYWCqZv+A== X-Google-Smtp-Source: APXvYqwHiSXHt83C8STql3OpjAcR4WCFyY4taXIzTx4s/TJDoXDAUTaaIe2TPILSQJU3aE1Kjpx27A== X-Received: by 2002:a05:620a:4f:: with SMTP id t15mr2414890qkt.286.1572002345463; Fri, 25 Oct 2019 04:19:05 -0700 (PDT) Received: from [10.250.15.239] ([76.191.34.78]) by smtp.gmail.com with ESMTPSA id l5sm861600qtj.52.2019.10.25.04.19.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 25 Oct 2019 04:19:04 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable From: Qian Cai Mime-Version: 1.0 (1.0) Subject: Re: [PATCH 2/2] mm, vmstat: reduce zone->lock holding time by /proc/pagetypeinfo Message-Id: <192965B3-B446-499C-AEE8-DFF087D46B87@lca.pw> Date: Fri, 25 Oct 2019 07:18:37 -0400 Cc: Andrew Morton , Mel Gorman , Waiman Long , Johannes Weiner , Roman Gushchin , Vlastimil Babka , Konstantin Khlebnikov , Jann Horn , Song Liu , Greg Kroah-Hartman , Rafael Aquini , linux-mm@kvack.org, LKML , Michal Hocko To: Michal Hocko X-Mailer: iPhone Mail (17A878) 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: =EF=BB=BF > On Oct 25, 2019, at 3:26 AM, Michal Hocko wrote: >=20 > Considering the pagetypeinfo is a debugging tool we do not really need > exact numbers here. The primary reason to look at the outuput is to see > how pageblocks are spread among different migratetypes and low number of > pages is much more interesting therefore putting a bound on the number > of pages on the free_list sounds like a reasonable tradeoff. >=20 > The new output will simply tell > [...] > Node 6, zone Normal, type Movable >100000 >100000 >100000 >10000= 0 41019 31560 23996 10054 3229 983 648 It was mentioned that developers could use this file is to see the movement o= f those numbers for debugging, so this supposed to introduce regressions as t= here is no movement anymore for those 100k+ items?=