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Date: Thu, 12 Mar 2015 12:18:10 -0400
From: Michal Hocko <mhocko@suse.cz>
To: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: linux-kernel@vger.kernel.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "K. Y. Srinivasan" <kys@microsoft.com>,
        Haiyang Zhang <haiyangz@microsoft.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>,
        Tang Chen <tangchen@cn.fujitsu.com>, Vlastimil Babka <vbabka@suse.cz>,
        David Rientjes <rientjes@google.com>,
        Fabian Frederick <fabf@skynet.be>,
        Zhang Zhen <zhenzhang.zhang@huawei.com>,
        Vladimir Davydov <vdavydov@parallels.com>,
        Wang Nan <wangnan0@huawei.com>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>, devel@linuxdriverproject.org,
        linux-mm@kvack.org
Subject: Re: [PATCH RESEND 0/3] memory_hotplug: hyperv: fix deadlock between
 memory adding and onlining
Message-ID: <20150312161810.GA18269@dhcp22.suse.cz>
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On Mon 09-03-15 09:40:43, Vitaly Kuznetsov wrote:
> Michal Hocko <mhocko@suse.cz> writes:
> 
> > [Sorry for the late response]
> >
> > This is basically the same code posted by KY Srinivasan posted late last
> > year (http://marc.info/?l=linux-mm&m=141782228129426&w=2). I had
> > objections to the implementation
> > http://marc.info/?l=linux-mm&m=141805109216700&w=2
> 
> Np, David's alternative fix is already in -mm:
> 
> https://lkml.org/lkml/2015/2/12/655

Thanks for the pointer. I have missed this one. This is definitely a
better approach than cluttering around exporting device lock.
-- 
Michal Hocko
SUSE Labs