From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?windows-1252?Q?Roger_Pau_Monn=E9?= Subject: Re: dom0 kenrel crashes for openstack + libvirt + libxl Date: Thu, 13 Nov 2014 11:57:55 +0100 Message-ID: <54648EB3.8040703@citrix.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Xing Lin , xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org El 12/11/14 a les 19.41, Xing Lin ha escrit: > Hi, > > I am aware that Xen via libvirt is in the group C support for openstack but > since I am not able to install xenserver iso at compute machines I have, I > have to consider to use xen with libvirt (xcp-xapi is not available for > ubuntu14.04). I have three nodes, each one running ubuntu 14.04. I follow > the instruction to install juno in ubuntu 14.04 and it works (I can create > instances from openstack GUI - horizon) when I use kvm as the hypervisor at > the compute node . However, if I switch to use xen as the hypervisor by > installing xen-hypervisor-amd64 or nova-compute-xen, it will fail to create > instances. It complained "backend for qemu disk is not ready". I checked > and did not find qemu process running in dom0. I could not find > /etc/init.d/xencommons either. Then, I compiled and installed xen-4.4 from > source code and I got xencommons in /etc/init.d. qemu process is running in > dom0. However, the dom0 kernel crashes this time when I try to launch an > instance from openstack GUI. I am able to create a xen guest with > virt-install from command line, with the following command. > > "$ virt-install --connect=xen:/// --name u14.04.3 --ram 1024 --disk > u14.04.3.img,size=4,driver_name=qemu --location > http://ftp.ubuntu.com/ubuntu/dists/trusty/main/installer-amd64/ --network > bridge=virbr0" > > > dmesg: > > [ 9443.130600] blkfront: xvda: flush diskcache: enabled; persistent grants: > enabled; indirect descriptors: disabled; > [ 9443.132818] xvda: xvda1 > [ 9444.604489] xen:grant_table: WARNING: g.e. 0x30 still in use! > [ 9444.604496] deferring g.e. 0x30 (pfn 0xffffffffffffffff) > [ 9444.604499] xen:grant_table: WARNING: g.e. 0x31 still in use! > [ 9444.604502] deferring g.e. 0x31 (pfn 0xffffffffffffffff) > [ 9444.604505] xen:grant_table: WARNING: g.e. 0x32 still in use! > [ 9444.604508] deferring g.e. 0x32 (pfn 0xffffffffffffffff) > ==== lots of them==== > [ 9444.604719] xen:grant_table: WARNING: g.e. 0xe still in use! > [ 9444.604721] deferring g.e. 0xe (pfn 0xffffffffffffffff) > [ 9444.604723] xen:grant_table: WARNING: g.e. 0xd still in use! > [ 9444.604725] deferring g.e. 0xd (pfn 0xffffffffffffffff) > [ 9448.325408] ------------[ cut here ]------------ > [ 9448.325421] WARNING: CPU: 5 PID: 19902 at > /build/buildd/linux-3.13.0/arch/x86/xen/multicalls.c:129 xen_mc_flush+0x > 1a9/0x1b0() > [ 9448.325492] CPU: 5 PID: 19902 Comm: sudo Tainted: GF O > 3.13.0-33-generic #58-Ubuntu > [ 9448.325494] Hardware name: Dell Inc. PowerEdge R710/00W9X3, BIOS 2.1.15 > 09/02/2010 > [ 9448.325497] 0000000000000009 ffff8802d13d9aa8 ffffffff8171bd04 > 0000000000000000 > [ 9448.325501] ffff8802d13d9ae0 ffffffff810676cd 0000000000000000 > 0000000000000001 > [ 9448.325505] ffff88030418ffe0 ffff88031d6ab180 0000000000000010 > ffff8802d13d9af0 > [ 9448.325509] Call Trace: > [ 9448.325518] [] dump_stack+0x45/0x56 > [ 9448.325523] [] warn_slowpath_common+0x7d/0xa0 > [ 9448.325526] [] warn_slowpath_null+0x1a/0x20 > [ 9448.325530] [] xen_mc_flush+0x1a9/0x1b0 > [ 9448.325534] [] xen_set_pud_hyper+0x109/0x110 > [ 9448.325538] [] xen_set_pud+0x9b/0xb0 > [ 9448.325543] [] __pmd_alloc+0xd6/0x110 > [ 9448.325548] [] move_page_tables+0x678/0x720 > [ 9448.325552] [] ? vma_adjust+0x337/0x7d0 > [ 9448.325557] [] shift_arg_pages+0xbd/0x1b0 > [ 9448.325560] [] ? mprotect_fixup+0x151/0x290 > [ 9448.325564] [] setup_arg_pages+0x1db/0x200 > [ 9448.325570] [] load_elf_binary+0x41c/0xd80 > [ 9448.325576] [] ? ima_get_action+0x23/0x30 > [ 9448.325579] [] ? process_measurement+0x82/0x2c0 > [ 9448.325584] [] search_binary_handler+0x8f/0x1b0 > [ 9448.325587] [] do_execve_common.isra.22+0x5a7/0x7e0 > [ 9448.325591] [] SyS_execve+0x36/0x50 > [ 9448.325596] [] stub_execve+0x69/0xa0 > [ 9448.325599] ---[ end trace 53ac16782e751c0a ]--- > [ 9448.347994] ------------[ cut here ]------------ > [ 9448.348004] WARNING: CPU: 1 PID: 19902 at > /build/buildd/linux-3.13.0/mm/mmap.c:2736 exit_mmap+0x16b/0x170() > ==== more message ignored ==== > > > I sent emails to the openstack mailing list and they gave me a few > suggestions. At last, Bob Ball suggested I should probably ask this > question on xen-devel mailing list. Any help will be highly appreciated! This looks like the bug already reported by George Dunlap, could you try to apply the following patch to qemu-xen and recompile? http://lists.xenproject.org/archives/html/xen-devel/2014-11/msg01112.html Roger.