From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk0-f177.google.com (mail-qk0-f177.google.com [209.85.220.177]) by kanga.kvack.org (Postfix) with ESMTP id C81E6828E8 for ; Mon, 8 Feb 2016 15:58:48 -0500 (EST) Received: by mail-qk0-f177.google.com with SMTP id o6so63620054qkc.2 for ; Mon, 08 Feb 2016 12:58:48 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com. [209.132.183.28]) by mx.google.com with ESMTPS id u108si32236481qge.50.2016.02.08.12.58.48 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 08 Feb 2016 12:58:48 -0800 (PST) From: Jeff Moyer Subject: Re: [PATCH 2/2] dax: move writeback calls into the filesystems References: <1454829553-29499-1-git-send-email-ross.zwisler@linux.intel.com> <1454829553-29499-3-git-send-email-ross.zwisler@linux.intel.com> <20160207215047.GJ31407@dastard> <20160208201808.GK27429@dastard> Date: Mon, 08 Feb 2016 15:58:44 -0500 In-Reply-To: (Dan Williams's message of "Mon, 8 Feb 2016 12:55:24 -0800") Message-ID: MIME-Version: 1.0 Content-Type: text/plain Sender: owner-linux-mm@kvack.org List-ID: To: Dan Williams Cc: Dave Chinner , Ross Zwisler , "linux-kernel@vger.kernel.org" , Theodore Ts'o , Alexander Viro , Andreas Dilger , Andrew Morton , Jan Kara , Matthew Wilcox , linux-ext4 , linux-fsdevel , Linux MM , "linux-nvdimm@lists.01.org" , XFS Developers Dan Williams writes: > I agree the mount option needs to die, and I fully grok the reasoning. > What I'm concerned with is that a system using fully-DAX-aware > applications is forced to incur the overhead of maintaining *sync > semantics, periodic sync(2) in particular, even if it is not relying > on those semantics. > > However, like I said in my other mail, we can solve that with > alternate interfaces to persistent memory if that becomes an issue and > not require that "disable *sync" capability to come through DAX. What do you envision these alternate interfaces looking like? -Jeff -- 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: email@kvack.org