After upgrading to 3.4.0-1.fc17.i686.PAE I got a Xen virtual machine kernel panic during the boot. Had to back-out back to 3.3.7-1.fc17.i686.PAE Host system is centos 5.8. [ 0.000000] Reserving virtual address space above 0xf5800000 [ 0.000000] Initializing cgroup subsys cpuset [ 0.000000] Initializing cgroup subsys cpu [ 0.000000] Linux version 3.4.0-1.fc17.i686.PAE (mockbuild.fedoraproject.org) (gcc version 4.7.0 20120507 (Red Hat 4.7.0-5) (GCC) ) #1 SMP Sun Jun 3 06:54:54 UTC 2012 [ 0.000000] ACPI in unprivileged domain disabled [ 0.000000] Released 0 pages of unused memory [ 0.000000] Set 0 page(s) to 1-1 mapping [ 0.000000] BIOS-provided physical RAM map: [ 0.000000] Xen: 0000000000000000 - 00000000000a0000 (usable) [ 0.000000] Xen: 00000000000a0000 - 0000000000100000 (reserved) [ 0.000000] Xen: 0000000000100000 - 0000000020800000 (usable) [ 0.000000] NX (Execute Disable) protection: active [ 0.000000] DMI not present or invalid. [ 0.000000] last_pfn = 0x20800 max_arch_pfn = 0x1000000 [ 0.000000] init_memory_mapping: 0000000000000000-0000000020800000 [ 0.000000] RAMDISK: 00fe4000 - 031b3000 [ 0.000000] 0MB HIGHMEM available. [ 0.000000] 520MB LOWMEM available. [ 0.000000] mapped low ram: 0 - 20800000 [ 0.000000] low ram: 0 - 20800000 [ 0.000000] Zone PFN ranges: [ 0.000000] DMA 0x00000010 -> 0x00001000 [ 0.000000] Normal 0x00001000 -> 0x00020800 [ 0.000000] HighMem empty [ 0.000000] Movable zone start PFN for each node [ 0.000000] Early memory PFN ranges [ 0.000000] 0: 0x00000010 -> 0x000000a0 [ 0.000000] 0: 0x00000100 -> 0x00020800 [ 0.000000] Using APIC driver default [ 0.000000] SFI: Simple Firmware Interface v0.81 http://simplefirmware.org [ 0.000000] SMP: Allowing 1 CPUs, 0 hotplug CPUs [ 0.000000] Local APIC disabled by BIOS -- you can enable it with "lapic" [ 0.000000] APIC: disable apic facility [ 0.000000] APIC: switched to apic NOOP [ 0.000000] PM: Registered nosave memory: 00000000000a0000 - 0000000000100000 [ 0.000000] Allocating PCI resources starting at 20800000 (gap: 20800000:df800000) [ 0.000000] Booting paravirtualized kernel on Xen [ 0.000000] Xen version: 3.1.2-308.8.1.el5 (preserve-AD) [ 0.000000] setup_percpu: NR_CPUS:32 nr_cpumask_bits:32 nr_cpu_ids:1 nr_node_ids:1 [ 0.000000] PERCPU: Embedded 14 pages/cpu @dfbdd000 s34112 r0 d23232 u57344 [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 131968 [ 0.000000] Kernel command line: root=/dev/mapper/f17-root ro SYSFONT=latarcyrheb-sun16 LANG=en_US.UTF-8 [ 0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes) [ 0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes) [ 0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes) [ 0.000000] Initializing CPU#0 [ 0.000000] allocated 1064832 bytes of page_cgroup [ 0.000000] please try 'cgroup_disable=memory' option if you don't want memory cgroups [ 0.000000] Initializing HighMem for node 0 (00000000:00000000) [ 0.000000] Memory: 471744k/532480k available (5444k kernel code, 60288k reserved, 2656k data, 640k init, 0k highmem) [ 0.000000] virtual kernel memory layout: [ 0.000000] fixmap : 0xf5296000 - 0xf57ff000 (5540 kB) [ 0.000000] pkmap : 0xf4e00000 - 0xf5000000 (2048 kB) [ 0.000000] vmalloc : 0xe1000000 - 0xf4dfe000 ( 317 MB) [ 0.000000] lowmem : 0xc0000000 - 0xe0800000 ( 520 MB) [ 0.000000] .init : 0xc0bea000 - 0xc0c8a000 ( 640 kB) [ 0.000000] .data : 0xc0951193 - 0xc0be9480 (2656 kB) [ 0.000000] .text : 0xc0400000 - 0xc0951193 (5444 kB) [ 0.000000] SLUB: Genslabs=15, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 [ 0.000000] Hierarchical RCU implementation. [ 0.000000] NR_IRQS:2304 nr_irqs:256 16 [ 0.000000] Console: colour dummy device 80x25 [ 0.000000] console [tty0] enabled [ 0.000000] console [hvc0] enabled [ 0.000000] installing Xen timer for CPU 0 [ 0.000000] Detected 2400.084 MHz processor. [ 0.000999] Calibrating delay loop (skipped), value calculated using timer frequency.. 4800.16 BogoMIPS (lpj=2400084) [ 0.000999] pid_max: default: 32768 minimum: 301 [ 0.000999] Security Framework initialized [ 0.000999] SELinux: Initializing. [ 0.000999] Mount-cache hash table entries: 512 [ 0.000999] Initializing cgroup subsys cpuacct [ 0.000999] Initializing cgroup subsys memory [ 0.000999] Initializing cgroup subsys devices [ 0.000999] Initializing cgroup subsys freezer [ 0.000999] Initializing cgroup subsys net_cls [ 0.000999] Initializing cgroup subsys blkio [ 0.000999] Initializing cgroup subsys perf_event [ 0.000999] SMP alternatives: switching to UP code [ 0.063154] Freeing SMP alternatives: 24k freed [ 0.063174] ftrace: allocating 22379 entries in 44 pages [ 0.069068] Performance Events: unsupported p6 CPU model 15 no PMU driver, software events only. [ 0.069210] NMI watchdog: disabled (cpu0): hardware events not enabled [ 0.069242] Brought up 1 CPUs [ 0.069380] devtmpfs: initialized [ 0.070413] atomic64 test passed for i586+ platform with CX8 and with SSE [ 0.070431] Grant tables using version 1 layout. [ 0.070460] Grant table initialized [ 0.090290] RTC time: 165:165:165, date: 165/165/65 [ 0.090333] NET: Registered protocol family 16 [ 0.091001] PCI: setting up Xen PCI frontend stub [ 0.091952] bio: create slab <bio-0> at 0 [ 0.092007] ACPI: Interpreter disabled. [ 0.092034] xen/balloon: Initialising balloon driver. [ 0.092046] xen-balloon: Initialising balloon driver. [ 0.092070] vgaarb: loaded [ 0.092142] SCSI subsystem initialized [ 0.092215] usbcore: registered new interface driver usbfs [ 0.092233] usbcore: registered new interface driver hub [ 0.093003] usbcore: registered new device driver usb [ 0.093080] PCI: System does not support PCI [ 0.093087] PCI: System does not support PCI [ 0.093165] NetLabel: Initializing [ 0.093171] NetLabel: domain hash size = 128 [ 0.093176] NetLabel: protocols = UNLABELED CIPSOv4 [ 0.093188] NetLabel: unlabeled traffic allowed by default [ 0.093238] Switching to clocksource xen [ 0.099735] pnp: PnP ACPI: disabled [ 0.101484] NET: Registered protocol family 2 [ 0.101539] IP route cache hash table entries: 8192 (order: 3, 32768 bytes) [ 0.101664] TCP established hash table entries: 32768 (order: 6, 262144 bytes) [ 0.101763] TCP bind hash table entries: 32768 (order: 6, 262144 bytes) [ 0.101852] TCP: Hash tables configured (established 32768 bind 32768) [ 0.101860] TCP: reno registered [ 0.101865] UDP hash table entries: 512 (order: 2, 16384 bytes) [ 0.101877] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes) [ 0.101927] NET: Registered protocol family 1 [ 0.101976] Unpacking initramfs... [ 0.236397] Freeing initrd memory: 34620k freed [ 0.248739] platform rtc_cmos: registered platform RTC device (no PNP device found) [ 0.248951] apm: BIOS not found. [ 0.249450] audit: initializing netlink socket (disabled) [ 0.249475] type=2000 audit(1339721751.476:1): initialized [ 0.266423] HugeTLB registered 2 MB page size, pre-allocated 0 pages [ 0.267713] VFS: Disk quotas dquot_6.5.2 [ 0.267765] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) [ 0.268198] msgmni has been set to 989 [ 0.268781] alg: No test for stdrng (krng) [ 0.268798] NET: Registered protocol family 38 [ 0.268837] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253) [ 0.268868] io scheduler noop registered [ 0.268874] io scheduler deadline registered [ 0.268883] io scheduler cfq registered (default) [ 0.268972] pci_hotplug: PCI Hot Plug PCI Core version: 0.5 [ 0.269010] pciehp: PCI Express Hot Plug Controller Driver version: 0.4 [ 0.269018] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 [ 0.269423] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled [ 0.269784] Non-volatile memory driver v1.3 [ 0.269794] Linux agpgart interface v0.103 [ 0.270499] loop: module loaded [ 0.270593] Fixed MDIO Bus: probed [ 0.270641] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver [ 0.270658] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver [ 0.270671] uhci_hcd: USB Universal Host Controller Interface driver [ 0.270715] usbcore: registered new interface driver usbserial [ 0.270729] usbcore: registered new interface driver usbserial_generic [ 0.270741] USB Serial support registered for generic [ 0.270746] usbserial: USB Serial Driver core [ 0.270767] i8042: PNP: No PS/2 controller found. Probing ports directly. [ 0.271632] mousedev: PS/2 mouse device common for all mice [ 0.331829] rtc_cmos rtc_cmos: rtc core: registered rtc_cmos as rtc0 [ 0.331869] rtc_cmos: probe of rtc_cmos failed with error -38 [ 0.331916] device-mapper: uevent: version 1.0.3 [ 0.331975] device-mapper: ioctl: 4.22.0-ioctl (2011-10-19) initialised: dm-devel [ 0.332036] EFI Variables Facility v0.08 2004-May-17 [ 0.332141] usbcore: registered new interface driver usbhid [ 0.332147] usbhid: USB HID core driver [ 0.332247] ip_tables: (C) 2000-2006 Netfilter Core Team [ 0.332287] TCP: cubic registered [ 0.332292] Initializing XFRM netlink socket [ 0.332385] NET: Registered protocol family 10 [ 0.332563] Mobile IPv6 [ 0.332569] NET: Registered protocol family 17 [ 0.332577] Registering the dns_resolver key type [ 0.332640] Using IPI No-Shortcut mode [ 0.332735] registered taskstats version 1 [ 0.332748] XENBUS: Device with no driver: device/vbd/51712 [ 0.332754] XENBUS: Device with no driver: device/vif/0 [ 0.332790] Magic number: 1:252:3141 [ 0.332811] drivers/rtc/hctosys.c: unable to open rtc device (rtc0) [ 0.332836] Initializing network drop monitor service [ 0.333122] Freeing unused kernel memory: 640k freed [ 0.334760] Write protecting the kernel text: 5448k [ 0.335360] Write protecting the kernel read-only data: 2140k [ 0.335371] NX-protecting the kernel data: 4792k [ 0.393443] BUG: unable to handle kernel paging request at dcfe4dd8 [ 0.393457] IP: [<c066a1a8>] atomic64_read_cx8+0x4/0xc [ 0.393469] *pdpt = 000000001cfe5027 *pde = 0000000003bbe067 *pte = 800000001cfe4061 [ 0.393482] Oops: 0003 [#1] SMP [ 0.393488] Modules linked in: [ 0.393493] [ 0.393498] Pid: 1, comm: init Not tainted 3.4.0-1.fc17.i686.PAE #1 [ 0.393507] EIP: 0061:[<c066a1a8>] EFLAGS: 00010246 CPU: 0 [ 0.393514] EIP is at atomic64_read_cx8+0x4/0xc [ 0.393520] EAX: b7800000 EBX: b7800000 ECX: dcfe4dd8 EDX: dcfe4dd8 [ 0.393527] ESI: b77df000 EDI: b77df000 EBP: df437c78 ESP: df437bec [ 0.393534] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: e021 [ 0.393542] CR0: 8005003b CR2: dcfe4dd8 CR3: 1cfe1000 CR4: 00002620 [ 0.393550] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 0.393557] DR6: ffff0ff0 DR7: 00000000 [ 0.393563] Process init (pid: 1, ti=df436000 task=df468000 task.ti=df436000) [ 0.393570] Stack: [ 0.393574] c051631f 000000e0 00000000 df437cd8 df66a840 df437c8c c04f87ee 00000fcc [ 0.393587] 08000875 b77e0fff b77e1000 dcfe1010 00000001 b77e0fff df468000 c0501242 [ 0.393601] b77e1000 dcf901b8 c0bd3080 dfbe1f08 00000001 00000000 df437c44 df437c44 [ 0.393614] Call Trace: [ 0.393620] [<c051631f>] ? unmap_single_vma+0x1af/0x6c0 [ 0.393628] [<c04f87ee>] ? generic_file_aio_read+0x57e/0x6e0 [ 0.393636] [<c0501242>] ? release_pages+0x172/0x1b0 [ 0.393643] [<c0500d70>] ? pagevec_move_tail_fn+0x90/0x90 [ 0.393650] [<c0516fb0>] unmap_vmas+0x50/0x90 [ 0.393657] [<c051b65d>] unmap_region+0x7d/0xf0 [ 0.393664] [<c051c020>] ? __split_vma+0x190/0x1f0 [ 0.393671] [<c051c59e>] do_munmap+0x20e/0x2c0 [ 0.393679] [<c0942880>] elf_map+0xa7/0xe8 [ 0.393686] [<c0588dc5>] load_elf_binary+0x1185/0x1280 [ 0.393694] [<c05453c5>] ? vfs_read+0xe5/0x160 [ 0.393701] [<c0587c40>] ? notesize.isra.5+0x30/0x30 [ 0.393708] [<c054a722>] search_binary_handler+0x122/0x300 [ 0.393715] [<c0549d05>] ? kernel_read+0x35/0x50 [ 0.393722] [<c0587a6a>] load_script+0x22a/0x250 [ 0.393729] [<c051895c>] ? get_user_pages+0x5c/0x70 [ 0.393736] [<c066c0a1>] ? _copy_from_user+0x41/0x60 [ 0.393743] [<c054a3ec>] ? copy_strings+0x21c/0x260 [ 0.393750] [<c0587840>] ? locks_remove_flock+0xf0/0xf0 [ 0.393757] [<c054a722>] search_binary_handler+0x122/0x300 [ 0.393765] [<c054b9d2>] do_execve+0x322/0x3c0 [ 0.393773] [<c0419877>] sys_execve+0x37/0x70 [ 0.393780] [<c094ffae>] ptregs_execve+0x12/0x18 [ 0.393788] [<c0948dd4>] ? syscall_call+0x7/0xb [ 0.393796] [<c04300e0>] ? default_send_IPI_mask_sequence_phys+0x60/0xc0 [ 0.393804] [<c0415720>] ? kernel_execve+0x20/0x30 [ 0.393811] [<c093e8d9>] ? run_init_process+0x1c/0x1e [ 0.393818] [<c093e91d>] ? init_post+0x42/0xae [ 0.393827] [<c0bea96c>] ? kernel_init+0x1ae/0x1ae [ 0.393834] [<c0bea23f>] ? do_early_param+0x7a/0x7a [ 0.393843] [<c0bea7be>] ? start_kernel+0x363/0x363 [ 0.393850] [<c095047e>] ? kernel_thread_helper+0x6/0x10 [ 0.393855] Code: 75 f1 8b 55 f0 65 33 15 14 00 00 00 75 11 83 c4 1c 5b 5e 5f 5d c3 90 8d 74 26 00 31 c0 eb e3 e8 cf c1 dd ff 90 90 90 89 d8 89 ca <3e> 0f c7 09 c3 8d 76 00 0f c7 0e 75 fb c3 66 90 3e 0f c7 0e 75 [ 0.393920] EIP: [<c066a1a8>] atomic64_read_cx8+0x4/0xc SS:ESP e021:df437bec [ 0.393930] CR2: 00000000dcfe4dd8 [ 0.393936] ---[ end trace 535903a603be7a52 ]---
*** This bug has been marked as a duplicate of bug 829016 ***