From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f70.google.com (mail-pa0-f70.google.com [209.85.220.70]) by kanga.kvack.org (Postfix) with ESMTP id BFA1B6B007E for ; Sun, 8 May 2016 05:01:49 -0400 (EDT) Received: by mail-pa0-f70.google.com with SMTP id yl2so220983063pac.2 for ; Sun, 08 May 2016 02:01:49 -0700 (PDT) Received: from bombadil.infradead.org (bombadil.infradead.org. [198.137.202.9]) by mx.google.com with ESMTPS id n5si29887682pfn.212.2016.05.08.02.01.49 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 08 May 2016 02:01:49 -0700 (PDT) Date: Sun, 8 May 2016 02:01:48 -0700 From: "hch@infradead.org" Subject: Re: [PATCH v4 5/7] fs: prioritize and separate direct_io from dax_io Message-ID: <20160508090148.GF15458@infradead.org> References: <1461878218-3844-1-git-send-email-vishal.l.verma@intel.com> <1461878218-3844-6-git-send-email-vishal.l.verma@intel.com> <5727753F.6090104@plexistor.com> <20160505142433.GA4557@infradead.org> <1462484343.29294.1.camel@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1462484343.29294.1.camel@intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: "Verma, Vishal L" Cc: "hch@infradead.org" , "boaz@plexistor.com" , "linux-kernel@vger.kernel.org" , "linux-block@vger.kernel.org" , "linux-nvdimm@ml01.01.org" , "xfs@oss.sgi.com" , "linux-mm@kvack.org" , "viro@zeniv.linux.org.uk" , "akpm@linux-foundation.org" , "axboe@fb.com" , "linux-fsdevel@vger.kernel.org" , "linux-ext4@vger.kernel.org" , "david@fromorbit.com" , "jack@suse.cz" , "matthew@wil.cx" On Thu, May 05, 2016 at 09:39:14PM +0000, Verma, Vishal L wrote: > How is it any 'less direct'? All it does now is follow the blockdev > O_DIRECT path. There still isn't any page cache involved.. It's still more overhead than the play DAX I/O path. -- 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