From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <owner-linux-mm@kvack.org>
Received: from mail-pg0-f69.google.com (mail-pg0-f69.google.com [74.125.83.69])
	by kanga.kvack.org (Postfix) with ESMTP id C0F606B038A
	for <linux-mm@kvack.org>; Mon, 13 Mar 2017 10:58:38 -0400 (EDT)
Received: by mail-pg0-f69.google.com with SMTP id y17so302232668pgh.2
        for <linux-mm@kvack.org>; Mon, 13 Mar 2017 07:58:38 -0700 (PDT)
Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com. [148.163.158.5])
        by mx.google.com with ESMTPS id o1si11638408pgn.177.2017.03.13.07.58.37
        for <linux-mm@kvack.org>
        (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
        Mon, 13 Mar 2017 07:58:38 -0700 (PDT)
Received: from pps.filterd (m0098421.ppops.net [127.0.0.1])
	by mx0a-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v2DEwaYi146180
	for <linux-mm@kvack.org>; Mon, 13 Mar 2017 10:58:37 -0400
Received: from e11.ny.us.ibm.com (e11.ny.us.ibm.com [129.33.205.201])
	by mx0a-001b2d01.pphosted.com with ESMTP id 294e40f8s3-1
	(version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT)
	for <linux-mm@kvack.org>; Mon, 13 Mar 2017 10:58:36 -0400
Received: from localhost
	by e11.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted
	for <linux-mm@kvack.org> from <arbab@linux.vnet.ibm.com>;
	Mon, 13 Mar 2017 10:58:29 -0400
Date: Mon, 13 Mar 2017 09:58:16 -0500
From: Reza Arbab <arbab@linux.vnet.ibm.com>
Subject: Re: WTH is going on with memory hotplug sysf interface (was: Re:
 [RFC PATCH] mm, hotplug: get rid of auto_online_blocks)
References: <20170302180315.78975d4b@nial.brq.redhat.com>
 <20170303082723.GB31499@dhcp22.suse.cz>
 <20170303183422.6358ee8f@nial.brq.redhat.com>
 <20170306145417.GG27953@dhcp22.suse.cz>
 <20170307134004.58343e14@nial.brq.redhat.com>
 <20170309125400.GI11592@dhcp22.suse.cz>
 <20170310135807.GI3753@dhcp22.suse.cz>
 <20170310155333.GN3753@dhcp22.suse.cz>
 <20170310190037.fifahjd47joim6zy@arbab-laptop>
 <20170313092145.GG31518@dhcp22.suse.cz>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Disposition: inline
In-Reply-To: <20170313092145.GG31518@dhcp22.suse.cz>
Message-Id: <20170313145815.uba3ij5seq6mrhow@arbab-laptop>
Sender: owner-linux-mm@kvack.org
List-ID: <linux-mm.kvack.org>
To: Michal Hocko <mhocko@kernel.org>
Cc: Igor Mammedov <imammedo@redhat.com>, Heiko Carstens <heiko.carstens@de.ibm.com>, Vitaly Kuznetsov <vkuznets@redhat.com>, linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>, Greg KH <gregkh@linuxfoundation.org>, "K. Y. Srinivasan" <kys@microsoft.com>, David Rientjes <rientjes@google.com>, Daniel Kiper <daniel.kiper@oracle.com>, linux-api@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>, linux-s390@vger.kernel.org, xen-devel@lists.xenproject.org, linux-acpi@vger.kernel.org, qiuxishi@huawei.com, toshi.kani@hpe.com, xieyisheng1@huawei.com, slaoub@gmail.com, iamjoonsoo.kim@lge.com, vbabka@suse.cz, Zhang Zhen <zhenzhang.zhang@huawei.com>, Yasuaki Ishimatsu <yasu.isimatu@gmail.com>, Tang Chen <tangchen@cn.fujitsu.com>

On Mon, Mar 13, 2017 at 10:21:45AM +0100, Michal Hocko wrote:
>> I agree with your general sentiment that this stuff is very 
>> nonintuitive.
>
>My criterion for nonintuitive is probably different because I would 
>call this _completely_unusable_. Sorry for being so loud about this but 
>the more I look into this area the more WTF code I see. This has seen 
>close to zero review and seems to be building up more single usecase 
>code on top of previous. We need to change this, seriously!

No argument here. I'm happy to help however I can.

-- 
Reza Arbab

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>