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 B747C21A09130 for ; Tue, 30 Oct 2018 01:17:59 -0700 (PDT) Date: Tue, 30 Oct 2018 09:17:57 +0100 From: Michal Hocko Subject: Re: [PATCH v5 4/4] mm: Defer ZONE_DEVICE page initialization to the point where we init pgmap Message-ID: <20181030081757.GX32673@dhcp22.suse.cz> References: <20181029141210.GJ32673@dhcp22.suse.cz> <84f09883c16608ddd2ba88103f43ec6a1c649e97.camel@linux.intel.com> <20181029163528.GL32673@dhcp22.suse.cz> <18dfc5a0db11650ff31433311da32c95e19944d9.camel@linux.intel.com> <20181029172415.GM32673@dhcp22.suse.cz> <8e7a4311a240b241822945c0bb4095c9ffe5a14d.camel@linux.intel.com> <20181029181827.GO32673@dhcp22.suse.cz> <3281f3044fa231bbc1b02d5c5efca3502a0d05a8.camel@linux.intel.com> <20181030062915.GT32673@dhcp22.suse.cz> 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 , osalvador@techadventures.net, 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 Mon 29-10-18 23:55:12, Dan Williams wrote: > On Mon, Oct 29, 2018 at 11:29 PM Michal Hocko wrote: > > > > On Mon 29-10-18 12:59:11, Alexander Duyck wrote: > > > On Mon, 2018-10-29 at 19:18 +0100, Michal Hocko wrote: > [..] > > > The patches Andrew pushed addressed the immediate issue so that now > > > systems with nvdimm/DAX memory can at least initialize quick enough > > > that systemd doesn't refuse to mount the root file system due to a > > > timeout. > > > > This is about the first time you actually mention that. I have re-read > > the cover letter and all changelogs of patches in this serious. Unless I > > have missed something there is nothing about real users hitting issues > > out there. nvdimm is still considered a toy because there is no real HW > > users can play with. > > Yes, you have missed something, because that's incorrect. There's been > public articles about these parts sampling since May. > > https://www.anandtech.com/show/12828/intel-launches-optane-dimms-up-to-512gb-apache-pass-is-here indeed! > That testing identified this initialization performance problem and > thankfully got it addressed in time for the current merge window. And I still cannot see a word about that in changelogs. -- Michal Hocko SUSE Labs _______________________________________________ Linux-nvdimm mailing list Linux-nvdimm@lists.01.org https://lists.01.org/mailman/listinfo/linux-nvdimm