From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paul Durrant <Paul.Durrant@citrix.com>
Subject: Re: Overlaped PIO with multiple ioreq_server (Xen4.6.1)
Date: Mon, 9 May 2016 16:19:31 +0000
Message-ID: <33a9046044a04c8e90d0e40561d90f2f@AMSPEX02CL03.citrite.net>
References: <alpine.GSO.2.00.1604272031410.22860@dmz.c-home.cz>
 <CAFLBxZYVjs+sKVz51ycWaA64yQxysAG_P4UT7qLV9fxjn3UnAA@mail.gmail.com>
 <2207476cf32b4e8fad39374a6ebd8a1f@AMSPEX02CL03.citrite.net>
 <alpine.GSO.2.00.1604281249220.13673@dmz.c-home.cz>
 <a4c52d618821405c8bdab370828e3e0e@AMSPEX02CL03.citrite.net>
 <573088D1.3080400@redhat.com>
 <abd0f2cfba4e4f0fa3ed50741bb2984b@AMSPEX02CL03.citrite.net>
 <95a929eb370a4761b2a3ef504e79f0cb@AMSPEX02CL03.citrite.net>
 <0c7ffa680c8b41898771010239e16111@AMSPEX02CL03.citrite.net>
 <5730B851.3000109@redhat.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <xen-devel-bounces@lists.xen.org>
In-Reply-To: <5730B851.3000109@redhat.com>
Content-Language: en-US
List-Unsubscribe: <http://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
 <mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <http://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
 <mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Errors-To: xen-devel-bounces@lists.xen.org
Sender: "Xen-devel" <xen-devel-bounces@lists.xen.org>
To: Paolo Bonzini <pbonzini@redhat.com>, Martin Cerveny <M.Cerveny@computer.org>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>, George Dunlap <George.Dunlap@citrix.com>
List-Id: xen-devel@lists.xenproject.org
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