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Dom0 is Debian Lenny 2.6.26 / Xen 4.0.1, DomU is lucid PV with current
2.6.35-31 kernel (happens also to 2.6.35-30 but not to 2.6.35.22).
No pygrub involved. Config is like:
kernel = "/home/xen/boot/ubuntu_amd64_vmlinuz-2.6.35-31-virtual-2011-11-21"
ramdisk = "/home/xen/boot/ubuntu_amd64_initrd.img-2.6.35-31-virtual-2011-11-21"
maxmem = 16384
memory = 2048
maxvcpus = 8
vcpus = 1
cpus = "15"
Booting the domu leads to a crash (excerpt):
[ 0.010000] CPU: Unsupported number of siblings 32
[ 0.010000] Performance Events: unsupported p6 CPU model 44 no PMU driver,
software events only.
[ 0.010000] SMP alternatives: switching to UP code
[ 0.022859] ftrace: converting mcount calls to 0f 1f 44 00 00
[ 0.022881] ftrace: allocating 23051 entries in 91 pages
[ 0.030076] cpu 0 spinlock event irq 1
[ 0.030390] installing Xen timer for CPU 1
[ 0.030409] cpu 1 spinlock event irq 7
[ 0.030442] SMP alternatives: switching to SMP code
[ 0.010000] CPU: Unsupported number of siblings 32
[ 0.045228] installing Xen timer for CPU 2
[ 0.045254] cpu 2 spinlock event irq 13
[ 0.010000] CPU: Unsupported number of siblings 32
[ 0.045634] installing Xen timer for CPU 3
[ 0.045670] cpu 3 spinlock event irq 19
[ 0.010000] CPU: Unsupported number of siblings 32
[ 0.046056] installing Xen timer for CPU 4
[ 0.046092] cpu 4 spinlock event irq 25
[ 0.010000] CPU: Unsupported number of siblings 32
[ 0.046480] installing Xen timer for CPU 5
[ 0.046516] cpu 5 spinlock event irq 31
[ 0.010000] CPU: Unsupported number of siblings 32
[ 0.046891] installing Xen timer for CPU 6
[ 0.046926] cpu 6 spinlock event irq 37
[ 0.010000] CPU: Unsupported number of siblings 32
[ 0.047307] installing Xen timer for CPU 7
[ 0.047354] cpu 7 spinlock event irq 43
[ 0.010000] CPU: Unsupported number of siblings 32
[ 0.047642] Brought up 8 CPUs
[ 0.048434] devtmpfs: initialized
[ 0.050968] Grant table initialized
[ 0.050979] regulator: core version 0.5
[ 0.060008] Time: 165:165:165 Date: 165/165/65
[ 0.060008] NET: Registered protocol family 16
[ 0.060099] Trying to unpack rootfs image as initramfs...
[ 0.087325] Freeing initrd memory: 24672k freed
[ 0.200000] Cannot set affinity for irq 0
[ 0.200000] Broke affinity for irq 6
[ 0.200000] Broke affinity for irq 7
[ 0.200000] Broke affinity for irq 8
[ 0.200000] Broke affinity for irq 9
[ 0.200000] Broke affinity for irq 10
[ 0.200000] Broke affinity for irq 11
[ 0.210000] ------------[ cut here ]------------
[ 0.210000] kernel BUG at
/build/buildd/linux-lts-backport-maverick-2.6.35/arch/x86/xen/spinlock.c:344!
[ 0.210000] invalid opcode: 0000 [#1] SMP
[ 0.210000] last sysfs file:
[ 0.210000] CPU 5
[ 0.210000] Modules linked in:
[ 0.210000]
[ 0.210000] Pid: 18, comm: migration/5 Not tainted 2.6.35-31-virtual
#62~lucid1-Ubuntu /
[ 0.210000] RIP: e030:[<ffffffff81007cb4>] [<ffffffff81007cb4>]
dummy_handler+0x4/0x10
[ 0.210000] RSP: e02b:ffff880003a8dea8 EFLAGS: 00010046
[ 0.210000] RAX: ffffffffff57b000 RBX: ffff88007fc0cba0 RCX: 0000000000000000
[ 0.210000] RDX: 0000000000400200 RSI: 0000000000000000 RDI: 000000000000001f
[ 0.210000] RBP: ffff880003a8dea8 R08: 0000000000000000 R09: 0000000000000000
[ 0.210000] R10: ffff880003a95028 R11: 0000000000012d70 R12: 0000000000000000
[ 0.210000] R13: 0000000000000000 R14: 000000000000001f R15: 0000000000000100
[ 0.210000] FS: 0000000000000000(0000) GS:ffff880003a8a000(0000)
knlGS:0000000000000000
[ 0.210000] CS: e033 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 0.210000] CR2: 0000000000000000 CR3: 0000000001a50000 CR4: 0000000000002660
[ 0.210000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 0.210000] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 0.210000] Process migration/5 (pid: 18, threadinfo ffff88007d454000, task
ffff88007d42db80)
[ 0.210000] Stack:
[ 0.210000] ffff880003a8def8 ffffffff810c9df0 0000000000000000
0000000000000000
[ 0.210000] <0> ffff880003a9ae20 ffff88007fc03500 000000000000001f
0000000000000a00
[ 0.210000] <0> 0000000000000001 0000000000000100 ffff880003a8df18
ffffffff810cc442
[ 0.210000] Call Trace:
[ 0.210000] <IRQ>
[ 0.210000] [<ffffffff810c9df0>] handle_IRQ_event+0x50/0x160
[ 0.210000] [<ffffffff810cc442>] handle_percpu_irq+0x42/0x80
[ 0.210000] [<ffffffff813481fe>] xen_evtchn_do_upcall+0x1de/0x210
[ 0.210000] [<ffffffff810b1e00>] ? cpu_stopper_thread+0xf0/0x1d0
[ 0.210000] [<ffffffff8100b02e>] xen_do_hypervisor_callback+0x1e/0x30
[ 0.210000] <EOI>
[ 0.210000] [<ffffffff810b1e00>] ? cpu_stopper_thread+0xf0/0x1d0
[ 0.210000] [<ffffffff8100122a>] ? hypercall_page+0x22a/0x1010
[ 0.210000] [<ffffffff8100122a>] ? hypercall_page+0x22a/0x1010
[ 0.210000] [<ffffffff81006b4d>] ? xen_force_evtchn_callback+0xd/0x10
[ 0.210000] [<ffffffff810072f2>] ? check_events+0x12/0x20
[ 0.210000] [<ffffffff81007299>] ? xen_irq_enable_direct_end+0x0/0x7
[ 0.210000] [<ffffffff810b1f8f>] ? stop_machine_cpu_stop+0xaf/0xe0
[ 0.210000] [<ffffffff810b1ee0>] ? stop_machine_cpu_stop+0x0/0xe0
[ 0.210000] [<ffffffff810b1e06>] ? cpu_stopper_thread+0xf6/0x1d0
[ 0.210000] [<ffffffff815a4b71>] ? schedule+0x3e1/0x850
[ 0.210000] [<ffffffff815a6f8e>] ? _raw_spin_unlock_irqrestore+0x1e/0x30
[ 0.210000] [<ffffffff810b1d10>] ? cpu_stopper_thread+0x0/0x1d0
[ 0.210000] [<ffffffff8107f526>] ? kthread+0x96/0xa0
[ 0.210000] [<ffffffff8100aee4>] ? kernel_thread_helper+0x4/0x10
[ 0.210000] [<ffffffff8100a313>] ? int_ret_from_sys_call+0x7/0x1b
[ 0.210000] [<ffffffff815a751d>] ? retint_restore_args+0x5/0x6
[ 0.210000] [<ffffffff8100aee0>] ? kernel_thread_helper+0x0/0x10
[ 0.210000] Code: 89 e5 c9 0f 95 c0 c3 55 b8 01 00 00 00 86 07 84 c0 48 89
e5 0f 94 c0 c9 0f b6 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 <0f> 0b
eb fe 0f 1f 84 00 00 00 00 00 55 ba ff ff ff ff 48 89 e5
[ 0.210000] RIP [<ffffffff81007cb4>] dummy_handler+0x4/0x10
[ 0.210000] RSP <ffff880003a8dea8>
[ 0.210000] ---[ end trace f17e946d22a56015 ]---
(full trace in attachment).
** Affects: ubuntu
Importance: Undecided
Status: New
--
setting maxvcpus larger than vcpus in config triggers kernel bug
https://bugs.launchpad.net/bugs/893177
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