From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [PATCH 00/10] PV-IO v3 Date: Tue, 21 Aug 2007 20:12:38 +0300 Message-ID: <46CB1D06.1040005@qumranet.com> References: <20070816231357.8044.55943.stgit@ghaskins-t60p.haskins.net> <1187313953.6449.70.camel@localhost.localdomain> <1187328402.4363.110.camel@ghaskins-t60p.haskins.net> <1187336618.6449.106.camel@localhost.localdomain> <1187358614.4363.135.camel@ghaskins-t60p.haskins.net> <1187652496.19435.141.camel@localhost.localdomain> <64F9B87B6B770947A9F8391472E032160D464FEB@ehost011-8.exch011.intermedia.net> <1187683122.19435.171.camel@localhost.localdomain> <1187697638.4363.277.camel@ghaskins-t60p.haskins.net> <1187704038.19435.194.camel@localhost.localdomain> <1187705162.4363.323.camel@ghaskins-t60p.haskins.net> <1187714864.4363.358.camel@ghaskins-t60p.haskins.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, virtualization To: Gregory Haskins Return-path: In-Reply-To: <1187714864.4363.358.camel-5CR4LY5GPkvLDviKLk5550HKjMygAv58XqFh9Ls21Oc@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org Gregory Haskins wrote: > On Tue, 2007-08-21 at 10:06 -0400, Gregory Haskins wrote: > >> On Tue, 2007-08-21 at 23:47 +1000, Rusty Russell wrote: >> >>> In the guest -> host direction, an interface like virtio is designed >>> for batching, with the explicit distinction between add_buf & sync. >>> >> Right. IOQ has "iter_push()" and "signal()" as synonymous operations. >> > > Hi Rusty, > This reminded me of an area that I thought might have been missing in > virtio compared to IOQ. That is, flexibility in the io-completion via > the distinction between "signal" and "sync". sync() implies that its a > blocking call based on the full drain of the queue, correct? No, sync() means "make the other side aware that there's work to be done". -- Do not meddle in the internals of kernels, for they are subtle and quick to panic. ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/