Received: by 2002:a05:6a10:a0d1:0:0:0:0 with SMTP id j17csp178403pxa;
        Tue, 18 Aug 2020 20:29:52 -0700 (PDT)
X-Google-Smtp-Source: ABdhPJwLwiwzxJXhOpHIMdkagXmQY7yzYgkaJUzn6mQp9UgW7w6rifunM8BYnK4qRVrPe85h9rp7
X-Received: by 2002:a17:906:8748:: with SMTP id hj8mr23946151ejb.477.1597807792539;
        Tue, 18 Aug 2020 20:29:52 -0700 (PDT)
ARC-Seal: i=1; a=rsa-sha256; t=1597807792; cv=none;
        d=google.com; s=arc-20160816;
        b=D/FC2Fm2ZDGaMXtaaKq0KehEdVnSOSCyyj0oX1pq+69NLz4Cc+WlBJkTrK7NgJ94sI
         NrVSKwyZicMnIc9szLrVlPnzxIPdFrlujNr/mAtzZanjCz/7kS2i/78na/YVwA3kVutj
         DTL82JG87wttqUk4fbNAHsxsd96ztN9jb59Juae0VVmz88bPVnfgHxvJ48jURYjwZ1QM
         YNgNT8Qmyuz7mGXh3cqe15Wq3mS6xYB3Y4HQzwqUqQVlqfCUkBmbkyiQaZM8FI3InUTg
         8evWnW+omQ3nmauINUK94nHQezn2L2qUng+24nbx0NEXWbDkXpZOQxfyjNuXZQoBxAxq
         eUmQ==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816;
        h=list-id:precedence:sender:content-transfer-encoding:mime-version
         :references:in-reply-to:message-id:subject:cc:to:from:date
         :dkim-signature;
        bh=vUOZccDOSJFU/JBNEuEQM6+ttiuWXG+F8MsnRbbiuxc=;
        b=kkGpgkqGHXVSsaC1xxdhaRnYpSqCPM5kjKISEXKuwb6VdDzp/AVHhgrAjARgsABW8l
         wK0FfbeRvoT5xhijel8sotM/lk8WzXfM09Svixr7lx4mrgkYItxRXWniwD3Iml/EKdQC
         /j0g8d8hgAp7EH7GNRksmWMxxF9pR4lMGsXYgmie8ZjAKcJBp4NTx4RC1CcqEcSi+2d6
         GsJb8RZXtqKk95S3GkZkM0vF4r8G6A/JiXjhYiYInB0KDuL1v1IdGJB+7NTW6dExKvox
         uZj5ZJGqnC9L4pV64WE2mqsJSdQ2vOG0bXchsSXUuH06CzzZSM4Eu/iJsWg2nfAGbDOA
         rL1A==
ARC-Authentication-Results: i=1; mx.google.com;
       dkim=pass header.i=@kernel.org header.s=default header.b="Y/GJHTDJ";
       spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18])
        by mx.google.com with ESMTP id b9si15146792edk.256.2020.08.18.20.29.27;
        Tue, 18 Aug 2020 20:29:52 -0700 (PDT)
Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Authentication-Results: mx.google.com;
       dkim=pass header.i=@kernel.org header.s=default header.b="Y/GJHTDJ";
       spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1726977AbgHSD0V (ORCPT <rfc822;luigi.mantellini.ml@gmail.com>
        + 99 others); Tue, 18 Aug 2020 23:26:21 -0400
Received: from mail.kernel.org ([198.145.29.99]:32862 "EHLO mail.kernel.org"
        rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
        id S1726627AbgHSD0V (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
        Tue, 18 Aug 2020 23:26:21 -0400
Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41])
        (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
        (No client certificate requested)
        by mail.kernel.org (Postfix) with ESMTPSA id 1BBFA20639;
        Wed, 19 Aug 2020 03:26:20 +0000 (UTC)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;
        s=default; t=1597807581;
        bh=q7+Q/+y2Z3KkXfI9Jfs3WmjNQUR4eLgv8vMcc1n2J1Y=;
        h=Date:From:To:Cc:Subject:In-Reply-To:References:From;
        b=Y/GJHTDJ0a8fdqqPNcZ36pLJ65TO6e5ck0D8eOohdb1dqL/x3PzHY7L/vAG1QGsZb
         5vv/m0nHF39SCc/E4B2r3E6jfqLKEC+ik+gy4VH03JgEbipL6j7Q7erl1g4o6Ol2po
         iKzrJGRfHg+zy//zwoDtTD1GU/KI6lhKaCf0R508=
Date:   Tue, 18 Aug 2020 20:26:19 -0700
From:   Andrew Morton <akpm@linux-foundation.org>
To:     <wuyun.wu@huawei.com>
Cc:     Christoph Lameter <cl@linux.com>,
        Pekka Enberg <penberg@kernel.org>,
        "David Rientjes" <rientjes@google.com>,
        Joonsoo Kim <iamjoonsoo.kim@lge.com>, <hewenliang4@huawei.com>,
        <hushiyuan@huawei.com>,
        "open list:SLAB ALLOCATOR" <linux-mm@kvack.org>,
        "open list" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] mm/slub: sysfs cleanup on cpu partial when
 !SLUB_CPU_PARTIAL
Message-Id: <20200818202619.6f04826a98d845e489890bba@linux-foundation.org>
In-Reply-To: <20200813084858.1494-1-wuyun.wu@huawei.com>
References: <20200813084858.1494-1-wuyun.wu@huawei.com>
X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu)
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Thu, 13 Aug 2020 16:48:54 +0800 <wuyun.wu@huawei.com> wrote:

> Hide cpu partial related sysfs entries when !CONFIG_SLUB_CPU_PARTIAL to
> avoid confusion.
> 

But it changes the userspace interface in ways which might cause
existing code to misbehave?

We just had to revert a different commit for this reason :(

http://lkml.kernel.org/r/20200811075412.12872-1-bhe@redhat.com