From mboxrd@z Thu Jan 1 00:00:00 1970 From: Juergen Gross Subject: Re: Hypervisor error messages after xl block-detach with linux 3.18-rc5 Date: Tue, 25 Nov 2014 17:10:40 +0100 Message-ID: <5474AA00.8050500@suse.com> References: <546EFAE3.80404@suse.com> <20141121135747.GB2886@laptop.dumpdata.com> <5473008C.4080604@suse.com> <1416823327.26329.25.camel@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1416823327.26329.25.camel@citrix.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: "xen-devel@lists.xensource.com" , Stefano Stabellini List-Id: xen-devel@lists.xenproject.org On 11/24/2014 11:02 AM, Ian Campbell wrote: > On Mon, 2014-11-24 at 10:55 +0100, Juergen Gross wrote: >> On 11/21/2014 02:57 PM, Konrad Rzeszutek Wilk wrote: >>> On Fri, Nov 21, 2014 at 09:42:11AM +0100, Juergen Gross wrote: >>>> Hi, >>>> >>>> while testing my "linear p2m list" patches I saw the following >>>> problem (even without my patches in place): >>>> >>>> In dom0 running linux 3.18-rc5 on top of Xen 4.4.1 I modified the >>>> disk image of a guest by attaching it to dom0: >>>> >>>> xl block-attach 0 file:/var/lib/libvirt/images/opensuse13-1/xvda,xvda,w >>>> mount /dev/xvda2 /mnt >>>> ... >>>> umount /mnt >>>> xl block-detach 0 xvda >> >> Did some more testing: >> - Seems to occur only when attaching a block device to dom0 > > That means a qdisk backed situation then, I think. > > Is your qemu up to date? > > http://xenbits.xen.org/gitweb/?p=qemu-upstream-unstable.git;a=commit;h=abbbc2f09a53f8f9ee565356ab11a78af006e45e resulted in slightly different messages, but could be related? Tried it with xen-unstable and newest qemu. Now I have another problem: xl -vvv block-attach 0 file:/var/lib/libvirt/images/opensuse13-1/xvda,xvda,w libxl: debug: libxl.c:4178:libxl_device_disk_add: ao 0xbac0f0: create: how=(nil) callback=(nil) poller=0xbac1d0 libxl: error: libxl.c:1897:device_addrm_aocomplete: unable to add device libxl: debug: libxl_event.c:1739:libxl__ao_complete: ao 0xbac0f0: complete, rc=-16 libxl: debug: libxl.c:4178:libxl_device_disk_add: ao 0xbac0f0: inprogress: poller=0xbac1d0, flags=ic libxl: debug: libxl_event.c:1711:libxl__ao__destroy: ao 0xbac0f0: destroy libxl_device_disk_add failed. rc=-16 means ERROR_JSON_CONFIG_EMPTY. Could it be that newest tools won't let me attach a block device to dom0? IMHO that's a severe regression! Juergen