Hi, >It isn't a known problem, so check your setup, cross-check against a non-XEN
>configuration and report it with the usual level of detail. First I have to say, that I am not a linux kernel expert, nor a programmer. I have the same problem as Nic James Ferrier. This mail is just a report of my unsuccessful tries to run uml virtual machine on top of a xenU virtual machine. I tried to play VIMINAL livecd (a VNUML livecd) iso file from a xenU virtual machine. The livecd boots with no problem on the xenU virtual machine, and the viminal kde desktop starts up like a charm, but I am unable to run the uml virtual machines embedded on the livecd. I tested the uml virtual machines on both a real linux host (a 2.6.17-gentoo-r8-skas3-v9-pre9 kernel) and the xenU virtual machine (a 2.6.16.26-xenU gentoo kernel). On the real host, the uml virtual machine boots up with no problem, on the xenU machine, boot hangs up with "Kernel panic - not syncing: start_userspace : expected SIGSTOP, got status = 256" (see more details below in the boot trace) As describe on that post http://www.mail-archive.com/user-mode-linux-user@lists.sourceforge.net/msg03997.html I tested several kernel configs trying to have corresponding CONFIG_HOST_* on uml kernel and CONFIG_VM_SPLIT_* on xenU. I tested all value (3G,3G_OPT, 2G, 1G). with CONFIG_PAGE_OFFSET having the same value on both kernels. Each time, the uml boots on the real host (2.6.17 skas3) and hangs up on the xenU machine. On other tests, where CONFIG_HOST_* and CONFIG_VM_SPLIT_* have no corresponding values, the uml virtual machine didn't even start on the xenU machine, just a single "killed" message was displayed. =========== uml boot trace ===================== /tmp/linux ubda=/tmp/essai-cow,/usr/local/share/viminal/filesystems/uml-root-fs-v iminal root=/dev/ubda Checking that ptrace can change system call numbers...OK Checking syscall emulation patch for ptrace...OK Checking advanced syscall emulation patch for ptrace...OK Checking for tmpfs mount on /dev/shm...nothing mounted on /dev/shm Checking PROT_EXEC mmap in /tmp/...OK Checking for the skas3 patch in the host: - /proc/mm...not found - PTRACE_FAULTINFO...not found - PTRACE_LDT...not found UML running in SKAS0 mode Checking that ptrace can change system call numbers...OK Checking syscall emulation patch for ptrace...OK Checking advanced syscall emulation patch for ptrace...OK Linux version 2.6.18-usermode-skas3-v9-pre9-fremap ([EMAIL PROTECTED]) (gcc version 4.1.1 (Gentoo 4.1.1)) #4 Wed Oct 18 12:40:09 CEST 2006 Built 1 zonelists. Total pages: 8192 Kernel command line: ubda=/tmp/essai-cow,/usr/local/share/viminal/filesystems/uml-root-fs-v iminal root=/dev/ubda PID hash table entries: 256 (order: 8, 1024 bytes) Dentry cache hash table entries: 4096 (order: 2, 16384 bytes) Inode-cache hash table entries: 2048 (order: 1, 8192 bytes) Memory: 28392k available Mount-cache hash table entries: 512 Checking for host processor cmov support...Yes Checking for host processor xmm support...No Checking that host ptys support output SIGIO...Yes Checking that host ptys support SIGIO on close...No, enabling workaround Using 2.6 host AIO NET: Registered protocol family 16 Sangoma WANPIPE Router v1.1 (c) 1995-2000 Sangoma Technologies Inc. NET: Registered protocol family 2 IP route cache hash table entries: 256 (order: -2, 1024 bytes) TCP established hash table entries: 1024 (order: 0, 4096 bytes) TCP bind hash table entries: 512 (order: -1, 2048 bytes) TCP: Hash tables configured (established 1024 bind 512) TCP reno registered Host TLS support detected Checking host MADV_REMOVE support...MADV_REMOVE failed, err = -22 Can't release memory to the host - memory hotplug won't be supported mconsole (version 2) initialized on /home/viminal/.uml/1FXCzN/mconsole UML Audio Relay (host dsp = /dev/sound/dsp, host mixer = /dev/sound/mixer) VFS: Disk quotas dquot_6.5.1 Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) Installing knfsd (copyright (C) 1996 [EMAIL PROTECTED]). Initializing Cryptographic API io scheduler noop registered io scheduler anticipatory registered (default) io scheduler deadline registered io scheduler cfq registered RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize loop: loaded (max 8 devices) nbd: registered device at major 43 PPP generic driver version 2.4.2 SLIP: version 0.8.4-NET3.019-NEWTTY (dynamic channels, max=256). tun: Universal TUN/TAP device driver, 1.6 tun: (C) 1999-2004 Max Krasnyansky <[EMAIL PROTECTED]> pktgen v2.67: Packet Generator for packet performance testing. netem: version 1.2 u32 classifier Performance counters on OLD policer on input device check on IPv4 over IPv4 tunneling driver GRE over IPv4 tunneling driver ip_conntrack version 2.4 (221 buckets, 1768 max) - 172 bytes per conntrack TCP bic registered Initializing IPsec netlink socket NET: Registered protocol family 1 NET: Registered protocol family 10 lo: Disabled Privacy Extensions IPv6 over IPv4 tunneling driver NET: Registered protocol family 17 Bridge firewalling registered Ebtables v2.0 registered 802.1Q VLAN Support v1.8 Ben Greear <[EMAIL PROTECTED]> All bugs added by David S. Miller <davem@redhat.com> Initialized stdio console driver Console initialized on /dev/tty0 Initializing software serial port version 1 Creating "/tmp/essai-cow" as COW file for "/usr/local/share/viminal/filesystems/uml-root-fs-viminal" ubda: unknown partition table ReiserFS: ubda: found reiserfs format "3.6" with standard journal ReiserFS: ubda: using ordered data mode ReiserFS: ubda: journal params: device ubda, size 8192, journal first block 18, max trans len 1024, max batch 900, max commit age 30, max trans age 30 ReiserFS: ubda: checking transaction log (ubda) ReiserFS: ubda: Using r5 hash to sort names VFS: Mounted root (reiserfs filesystem) readonly. mapping mmap stub failed, errno = 12 Kernel panic - not syncing: start_userspace : expected SIGSTOP, got status = 256 EIP: 0073:[<3fffe402>] CPU: 0 Not tainted ESP: 007b:37f0bfb4 EFLAGS: 00200246 Not tainted EAX: 00000000 EBX: 00003edc ECX: 00000013 EDX: 00003edc ESI: 00003ed8 EDI: 00000011 EBP: 37f0bfc4 DS: 007b ES: 007b 203bfb58: [<2003c50b>] notifier_call_chain+0x1d/0x38 203bfb74: [<2002e996>] panic+0x52/0xd3 203bfb90: [<200260c9>] start_userspace+0xd0/0x11c 203bfbb0: [<20016e45>] init_new_context_skas+0xfb/0x135 203bfbcc: [<2006becf>] do_execve+0x95/0x1d3 203bfbe4: [<20010167>] init+0x0/0x115 203bfbec: [<2001081c>] execve1+0x29/0x50 203bfc0c: [<20010858>] um_execve+0x15/0x3e 203bfc1c: [<20071463>] dupfd+0x48/0x58 203bfc24: [<2001014e>] run_init_process+0x33/0x4c 203bfc40: [<20010251>] init+0xea/0x115 203bfc4c: [<200229ba>] run_kernel_thread+0x42/0x4a 203bfc60: [<20010167>] init+0x0/0x115 203bfc6c: [<2002299e>] run_kernel_thread+0x26/0x4a 203bfce8: [<2002b5af>] schedule_tail+0x24/0x13a 203bfcfc: [<20016ff3>] new_thread_handler+0x7f/0xa7 203bfd00: [<20010167>] init+0x0/0x115 ======================= uml boot trace =============== -- !! Merci de noter ma nouvelle adresse mel !! Please note, new email addresse -----oOo----- Jacques Landru mel: landru AT telecom-lille1.eu TELECOM Lille 1 tel: +33 (0)3 2033 5556 Cite scientifique, rue G. Marconi fax: +33 (0)3 2033 5598 59658 VILLENEUVE D'ASCQ Cedex web: http://www.telecom-lille1.eu/people/landru -----oOo----- ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
