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=-6.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 4D433C55179 for ; Thu, 29 Oct 2020 13:44:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D4495207DE for ; Thu, 29 Oct 2020 13:44:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=cmpxchg-org.20150623.gappssmtp.com header.i=@cmpxchg-org.20150623.gappssmtp.com header.b="SdxoTd/s" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727676AbgJ2Noe (ORCPT ); Thu, 29 Oct 2020 09:44:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58152 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727417AbgJ2Nod (ORCPT ); Thu, 29 Oct 2020 09:44:33 -0400 Received: from mail-io1-xd44.google.com (mail-io1-xd44.google.com [IPv6:2607:f8b0:4864:20::d44]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E781DC0613D3 for ; Thu, 29 Oct 2020 06:44:32 -0700 (PDT) Received: by mail-io1-xd44.google.com with SMTP id r9so3418089ioo.7 for ; Thu, 29 Oct 2020 06:44:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cmpxchg-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=NqBYxd6gdZY+0kETjwOQHnaPSjG1U2WLdxmZrjsdJ4Y=; b=SdxoTd/skkrCykVaET1+J+5hCEYXJHflSz6baJJCqEWp1bR12pNZ+YOSnreRIn2z9O w4cRr/IZ+DxMUaU9EiSvxQqzJDvx6MfHHJPoruwEc817OGmI+TxD33kEYPNSTzmhDX1Q PC4KvTxiTxEpQYDW+N5qq6QTzL+Qfscb3RYSvo/9nuQkpKqE0WkONClDJVKu+CJ3mpLD ZDSh0YbnXEq6vKDp6mT3OyjY6QAbmF8OqDOdYuDE8w3IkGBUgQeVU0pRx/moikeS5e5W wrLoCFz4RVkIej83adbPWFthi07otZnB+svAFq+7CWLtRx+bT3WR22cfpIFVsJcQfzDj R9wA== 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:message-id:references :mime-version:content-disposition:in-reply-to; bh=NqBYxd6gdZY+0kETjwOQHnaPSjG1U2WLdxmZrjsdJ4Y=; b=pl8pDyzOfJRBCXZLraia6uXt3o9sd0ZQaKWWYI7+CTRcgl3z8ObB9H7AJq6Wu/ghv3 5kNedQIutbKTmyeSiiU2OwLAkLnII+/A+lQ/tBPealPMnDq6AqZ6idmBK5ZjFcmINnmB C+O/t48L+0Z0PWcDjJmil+fh6YPlRZy49T0p8JRW01MZimvffYr1KmrcuY4kmGa26VsJ ZoacwIk+RADLJbT49Bozyk85mBKZPcDCNtY9EBCbjFF5RRbJlGx4gX60GWXzorOH69NN Bb4Ev18DNetA2hTY+gAhGuZtSEUg6LSZeW5vCfYtkL6OPjaVIasaawL8q4UlaBmWjXt5 JDPA== X-Gm-Message-State: AOAM531CODfvBX3bSCUqsGSEd7ioDVhy7HBuMTSk1qzoVJCDxKs/ke9S U4J43yycCIWQdO5utjz08T/vNg== X-Google-Smtp-Source: ABdhPJxS73ikw0/v0Vwi1QYdX2THvEu5KuDcpKF+LEfO1IH4NHOmAlTHM7m75YDQvXyuHNhQ8EtJ4A== X-Received: by 2002:a5d:8543:: with SMTP id b3mr3599153ios.15.1603979072344; Thu, 29 Oct 2020 06:44:32 -0700 (PDT) Received: from localhost ([2620:10d:c091:480::1:536c]) by smtp.gmail.com with ESMTPSA id k8sm2347562ilh.8.2020.10.29.06.44.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Oct 2020 06:44:31 -0700 (PDT) Date: Thu, 29 Oct 2020 09:42:48 -0400 From: Johannes Weiner To: Alex Shi Cc: akpm@linux-foundation.org, mgorman@techsingularity.net, tj@kernel.org, hughd@google.com, khlebnikov@yandex-team.ru, daniel.m.jordan@oracle.com, willy@infradead.org, lkp@intel.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, shakeelb@google.com, iamjoonsoo.kim@lge.com, richard.weiyang@gmail.com, kirill@shutemov.name, alexander.duyck@gmail.com, rong.a.chen@intel.com, mhocko@suse.com, vdavydov.dev@gmail.com, shy828301@gmail.com Subject: Re: [PATCH v20 11/20] mm/lru: move lock into lru_note_cost Message-ID: <20201029134248.GA599825@cmpxchg.org> References: <1603968305-8026-1-git-send-email-alex.shi@linux.alibaba.com> <1603968305-8026-12-git-send-email-alex.shi@linux.alibaba.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1603968305-8026-12-git-send-email-alex.shi@linux.alibaba.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Oct 29, 2020 at 06:44:56PM +0800, Alex Shi wrote: > We have to move lru_lock into lru_note_cost, since it cycle up on memcg > tree, for future per lruvec lru_lock replace. It's a bit ugly and may > cost a bit more locking, but benefit from multiple memcg locking could > cover the lost. > > Signed-off-by: Alex Shi > Acked-by: Hugh Dickins > Cc: Johannes Weiner > Cc: Andrew Morton > Cc: linux-mm@kvack.org > Cc: linux-kernel@vger.kernel.org Acked-by: Johannes Weiner