From mboxrd@z Thu Jan 1 00:00:00 1970 From: Fabio Fantoni Subject: Re: Xen 4.3 development update Date: Mon, 13 May 2013 16:53:53 +0200 Message-ID: <5190FE81.3060106@m2r.biz> References: <518CD8D8.3090307@citrix.com> <518D046A.2090002@m2r.biz> <1368440802.537.45.camel@zakaz.uk.xensource.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="------------060302050704090700080004" Return-path: In-Reply-To: <1368440802.537.45.camel@zakaz.uk.xensource.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Ian Campbell Cc: Anthony Perard , George Dunlap , "xen-devel@lists.xen.org" , Stefano Stabellini List-Id: xen-devel@lists.xenproject.org This is a multi-part message in MIME format. --------------060302050704090700080004 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Il 13/05/2013 12:26, Ian Campbell ha scritto: > On Fri, 2013-05-10 at 15:30 +0100, Fabio Fantoni wrote: >> Il 10/05/2013 13:24, Anthony PERARD ha scritto: >>> On 10/05/13 12:08, Anthony PERARD wrote: >>>> On Fri, May 10, 2013 at 12:00 PM, George Dunlap >>>> wrote: >>>>> On Fri, May 10, 2013 at 11:26 AM, George Dunlap >>>>> wrote: >>>>>> * qxl not actually working >>>>>> > qxl apparently not enabled during compile by default >>>>>> > Appear to be some other bugs even when it is working: >>>>>> >http://lists.xen.org/archives/html/xen-devel/2012-11/msg00713.html >>>>>> owner: ? (Anthony was going to take a look) >>>>>> We need to either fix both of these problems or disable qxl for 4.3 >>>>> Anthony, you were going to take a look at this; did you make any progress? >>>> Yes, I'm still trying to figure out how to enable qxl in the VM. >>> And now, I can search why QEMU crash when starting Xorg with qxl. >>> >>> >> Hi, thanks for your help. >> I'm trying to have qxl full working on xen since end of 2011. >> Since half of 2012 is at least working as standard vga. > This means with: > vga = "qxl" > > in your configuration file? Yes > Are you saying that this configuration > works? For now it works only as standard vga > If not this then which configuration do you believe works? With qxl driver enabled on domU's os, qemu crashes >> The libxl patch should be correct, also with memory size setting. >> I have tried same parameters of libxl qxl patch without xen and are working. >> Also without kvm was working even if performance was really bad but at >> least qemu did not crash on start with qxl driver. >> Based on this test the problem seems to be xen related problem, probably >> about hvmloader. > What is the configuration which fails? See on attachment > > Which libxl patch "should be correct"? libxl has lots of patches! This patch that I refer: http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=aab4d1b266ce9891a684704f6abf6a5f6b3f7c24 > > So are you saying that although the libxl patch "should be correct" it > is in fact not sufficient to make qxl work? The qemu parameters used are correct, for now on xen works only as standard vga but on kvm and qemu-only tests works also with qxl driver. The difference with xen appares to be only on hvmloader. I tried to find the exactly problem without result, based on seabios debug I saw that when it detects xen hypervisor, seabios relies on tables passed by hvmloader instead generate them. Is the only effective difference viewed with seabios debug with and without xen. >> I have tried a lot of time to found exactly what the problem is without >> success for now. >> I have very little knowledge about these parts. > Which possible causes have you investigated and ruled out? What possible > causes have you been unable to check one way or the other? > > If you ask questions about specific things which you cannot follow then > we may be able to point you in the right direction. > > Ian. > Hope that information above can help to clarify the whole problem. If you need more details tell me and I'll post them. 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