From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47349) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zm2hN-0002k0-FY for qemu-devel@nongnu.org; Tue, 13 Oct 2015 12:45:17 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Zm2hJ-000088-DI for qemu-devel@nongnu.org; Tue, 13 Oct 2015 12:45:13 -0400 Received: from mx1.redhat.com ([209.132.183.28]:42304) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zm2hJ-00007s-6A for qemu-devel@nongnu.org; Tue, 13 Oct 2015 12:45:09 -0400 References: <561D2966.9070007@m2r.biz> From: John Snow Message-ID: <561D3513.8060005@redhat.com> Date: Tue, 13 Oct 2015 12:45:07 -0400 MIME-Version: 1.0 In-Reply-To: <561D2966.9070007@m2r.biz> Content-Type: text/plain; charset=iso-8859-15 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] Question about xen disk unplug support for ahci missed in qemu List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Fabio Fantoni , "xen-devel@lists.xen.org" , "qemu-devel@nongnu.org" Cc: Anthony.Perard@citrix.com, Stefano Stabellini On 10/13/2015 11:55 AM, Fabio Fantoni wrote: > I added ahci disk support in libxl and using it for week seems that was > ok, after a reply of Stefano Stabellini seems that xen disk unplug > support only ide disks: > http://git.qemu.org/?p=qemu.git;a=commitdiff;h=679f4f8b178e7c66fbc2f39c905374ee8663d5d8 > > Today Paul Durrant told me that even if pv disk is ok also with ahci and > the emulated one is offline can be a risk: > http://lists.xenproject.org/archives/html/win-pv-devel/2015-10/msg00021.html > > > I tried to take a fast look in qemu code but I not understand the needed > thing for add the xen disk unplug support also for ahci, can someone do > it or tell me useful information for do it please? > > Thanks for any reply and sorry for my bad english. > I'm not entirely sure what features you need AHCI to support in order for Xen to be happy. I'd guess hotplugging, but where I get confused is that IDE disks don't support hotplugging either, so I guess I'm not sure sure what you need. Stefano, can you help bridge my Xen knowledge gap? --js