Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753089AbbFVQmy (ORCPT ); Mon, 22 Jun 2015 12:42:54 -0400 Received: from mx1.redhat.com ([209.132.183.28]:52865 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751420AbbFVQmq (ORCPT ); Mon, 22 Jun 2015 12:42:46 -0400 From: Jeff Moyer To: Christoph Hellwig Cc: Dan Williams , Jens Axboe , "linux-nvdimm\@lists.01.org" , "linux-kernel\@vger.kernel.org" , Linux ACPI , linux-fsdevel , Ingo Molnar Subject: Re: [PATCH 14/15] libnvdimm: support read-only btt backing devices References: <20150621135406.GA9572@lst.de> <20150622063028.GA30434@lst.de> <20150622072844.GA31263@lst.de> <20150622154138.GC7952@lst.de> <20150622163224.GA9168@lst.de> X-PGP-KeyID: 1F78E1B4 X-PGP-CertKey: F6FE 280D 8293 F72C 65FD 5A58 1FF8 A7CA 1F78 E1B4 X-PCLoadLetter: What the f**k does that mean? Date: Mon, 22 Jun 2015 12:42:44 -0400 In-Reply-To: <20150622163224.GA9168@lst.de> (Christoph Hellwig's message of "Mon, 22 Jun 2015 18:32:24 +0200") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 802 Lines: 20 Christoph Hellwig writes: > On Mon, Jun 22, 2015 at 12:00:54PM -0400, Jeff Moyer wrote: >> Right now, the guidance should be to always use btt since there are no >> applications that are directly taking advantage of persistent memory >> (that I know). I expect documentation would take care of that. I also >> expect that, as applications add support, they would note the >> requirement for dax mountpoints in their documentation. > > It's not just DAX. Avoiding the overhead for anything else is > another good reason. OK, add torn sector detection/recovery to that statement, then. More importantly, do you agree with the sentiment or not? Cheers, Jeff -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in Please read the FAQ at http://www.tux.org/lkml/