From mboxrd@z Thu Jan 1 00:00:00 1970 From: Asias He Subject: Re: [PATCH RESEND 0/5] Add vhost-blk support Date: Mon, 16 Jul 2012 17:05:02 +0800 Message-ID: <5003D93E.2000304__30665.4563210488$1342429414$gmane$org@redhat.com> References: <1342169711-12386-1-git-send-email-asias@redhat.com> <20120714074911.GA31684@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20120714074911.GA31684@infradead.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: Christoph Hellwig Cc: linux-aio@kvack.org, Dave Kleikamp , Zach Brown , kvm@vger.kernel.org, "Michael S. Tsirkin" , linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, James Bottomley , Jeff Moyer , Benjamin LaHaise , Alexander Viro , linux-fsdevel@vger.kernel.org List-Id: virtualization@lists.linuxfoundation.org Hi Christoph, On 07/14/2012 03:49 PM, Christoph Hellwig wrote: > Please send a version that does direct block I/O similar to xen-blkback > for now. Seems xen-blkback converts the guest IO request to host bio and submit them directly. I was wondering whether this has a performance gain compared to AIO implementation. > If we get proper in-kernel aio support one day you can add > back file backend support. I talked with Dave and Zack on the in-kernel aio patch which James pointed out: http://marc.info/?l=linux-fsdevel&m=133312234313122 Dave will post a new version soon. I will wait for it. -- Asias