From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 4565121B02822 for ; Thu, 27 Sep 2018 04:20:43 -0700 (PDT) Date: Thu, 27 Sep 2018 13:20:41 +0200 From: Michal Hocko Subject: Re: [PATCH v5 4/4] mm: Defer ZONE_DEVICE page initialization to the point where we init pgmap Message-ID: <20180927112041.GG6278@dhcp22.suse.cz> References: <20180925200551.3576.18755.stgit@localhost.localdomain> <20180925202053.3576.66039.stgit@localhost.localdomain> <20180926075540.GD6278@dhcp22.suse.cz> <6f87a5d7-05e2-00f4-8568-bb3521869cea@linux.intel.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" To: Dan Williams Cc: Pasha Tatashin , linux-nvdimm , Dave Hansen , Linux Kernel Mailing List , Ingo Molnar , Linux MM , =?iso-8859-1?B?Suly9G1l?= Glisse , rppt@linux.vnet.ibm.com, alexander.h.duyck@linux.intel.com, Andrew Morton , "Kirill A. Shutemov" List-ID: On Wed 26-09-18 11:52:56, Dan Williams wrote: [...] > Could we push the hotplug lock deeper to the places that actually need > it? What I found with my initial investigation is that we don't even > need the hotplug lock for the vmemmap initialization with this patch > [1]. Yes, the scope of the hotplug lock should be evaluated and _documented_. Then we can build on top. -- Michal Hocko SUSE Labs _______________________________________________ Linux-nvdimm mailing list Linux-nvdimm@lists.01.org https://lists.01.org/mailman/listinfo/linux-nvdimm