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Re: [Xen-users] dom0 unable to launch domU


I added "earlyprintk=xen" in cmdline options to can view kernel messages.

Here is the output :
Started domain thundercat
(early) last_map_addr: 100000000 end: 100000000
(early) No NUMA configuration found
(early) Faking a node at 0000000000000000-0000000100000000
(early) Bootmem setup node 0 0000000000000000-0000000100000000
(early)   NODE_DATA [0000000000001000 - 0000000000004fff]
(early)   bootmap [0000000000008000 -  0000000000027fff] pages 20
(early) (5 early reservations) ==> bootmem [0000000000 - 0100000000]
(early) #0 [0000000000 - 0000001000] BIOS data page(early) ==> [0000000000 - 0000001000] (early) #1 [0001123000 - 0001130000] XEN PAGETABLES(early) ==> [0001123000 - 0001130000] (early) #2 [0000006000 - 0000008000] TRAMPOLINE(early) ==> [0000006000 - 0000008000] (early) #3 [0000200000 - 000091f838] TEXT DATA BSS(early) ==> [0000200000 - 000091f838] (early) #4 [0001130000 - 0001925000] PGTABLE(early) ==> [0001130000 - 0001925000]
(early) Zone PFN ranges:
(early)   DMA      0x00000000 -> 0x00001000
(early)   DMA32    0x00001000 -> 0x00100000
(early)   Normal   0x00100000 -> 0x00100000
(early) Movable zone start PFN for each node
(early) early_node_map[3] active PFN ranges
(early)     0: 0x00000000 -> 0x000000a0
(early)     0: 0x00000100 -> 0x00000920
(early)     0: 0x00001123 -> 0x00100000
(early) SMP: Allowing 1 CPUs, 0 hotplug CPUs
(early) No local APIC present
(early) PM: Registered nosave memory: 00000000000a0000 - 0000000000100000
(early) PM: Registered nosave memory: 0000000000920000 - 0000000001123000
(early) PCI: Warning: Cannot find a gap in the 32bit address range
(early) PCI: Unassigned devices with 32bit resource registers may break!
(early) Allocating PCI resources starting at 100200000 (gap: 100100000:400000)
(early) NR_CPUS:8 nr_cpumask_bits:8 nr_cpu_ids:1 nr_node_ids:1
(early) PERCPU: Allocating 61440 bytes of per cpu data
(early) Built 1 zonelists in Node order, mobility grouping on. Total pages: 1030267
(early) Policy zone: DMA32
(early) Kernel command line: root=/dev/xvda2 ro earlyprintk=xen
(early) Initializing CPU#0
(early) invalid opcode: 0000 [#1] (early) SMP (early)
(early) last sysfs file:
(early) CPU 0 (early)
(early) Modules linked in:(early)
(early) Pid: 0, comm: swapper Not tainted #1
(early) RIP: e030:[<ffffffff805c34b4>] (early) [<ffffffff805c34b4>] xsave_cntxt_init+0xb5/0x194
(early) RSP: e02b:ffffffff80819e38  EFLAGS: 00010046
(early) RAX: 0000000000000003 RBX: ffffffff80819e44 RCX: 0000000000000000
(early) RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000042620
(early) RBP: ffffffff80819e68 R08: ffffffff80819e38 R09: ffffffff80819e3c
(early) R10: 00000000ffffffff R11: 000000000000e710 R12: ffffffff80819e40
(early) R13: ffffffff80819e3c R14: ffffffff80819e38 R15: ffff880001949000
(early) FS: 0000000000000000(0000) GS:ffffffff808cf000(0000) knlGS:0000000000000000
(early) CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
(early) CR2: 0000000000000000 CR3: 0000000000201000 CR4: 0000000000002620
(early) DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
(early) DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
(early) Process swapper (pid: 0, threadinfo ffffffff80818000, task ffffffff80796340)
(early) Stack:
(early) 0000024000000000(early) 0000000300000240(early) 0000000080050033(early) 0000000000000000(early) (early) ffffffff808cd000(early) 0000000000000005(early) ffffffff80819e78(early) ffffffff805dab4f(early) (early) ffffffff80819e98(early) ffffffff805dabcb(early) ffff88008109e000(early) 00000000ffff8800(early)
(early) Call Trace:
(early)  [<ffffffff805dab4f>] init_thread_xstate+0x12/0x20
(early)  [<ffffffff805dabcb>] fpu_init+0x6e/0xbe
(early)  [<ffffffff805dc728>] cpu_init+0x310/0x33c
(early)  [<ffffffff808339c5>] trap_init+0x5b0/0x5b7
(early)  [<ffffffff8082cb24>] start_kernel+0x1cb/0x365
(early)  [<ffffffff8082c2c1>] x86_64_start_reservations+0xac/0xb0
(early)  [<ffffffff80832dfd>] xen_start_kernel+0x814/0x823
(early) Code: (early) e9 (early) 30 (early) 00 (early) 00 (early) 00 (early) 04 (early) 00 (early) ff (early) 15 (early) ba (early) be (early) 1d (early) 00 (early) 89 (early) c7 (early) 81 (early) cf (early) 00 (early) 00 (early) 04 (early) 00 (early) ff (early) 15 (early) b4 (early) be (early) 1d (early) 00 (early) 31 (early) c9 (early) 48 (early) 8b (early) 05 (early) c3 (early) 07 (early) 31 (early) 00 (early) 48 (early) 89 (early) c2 (early) 48 (early) c1 (early) ea (early) 20 (early) <0f> (early) 01 (early) d1 (early) c7 (early) 45 (early) dc (early) 0d (early) 00 (early) 00 (early) 00 (early) c7 (early) 45 (early) d4 (early) 00 (early) 00 (early) 00 (early) 00 (early) 48 (early) 89 (early) df (early) 4c (early)
(early) RIP (early)  [<ffffffff805c34b4>] xsave_cntxt_init+0xb5/0x194
(early)  RSP <ffffffff80819e38>
(early) ---[ end trace 4eaa2a86a8e2da22 ]---
(early) Kernel panic - not syncing: Attempted to kill the idle task!
(early) ------------[ cut here ]------------
(early) WARNING: at kernel/smp.c:329 smp_call_function_many+0x40/0x1f7()
(early) Modules linked in:(early)
(early) Pid: 0, comm: swapper Tainted: G      D #1
(early) Call Trace:
(early)  [<ffffffff802407b7>] warn_slowpath+0xaf/0xd6
(early)  [<ffffffff805e3c3d>] ? _spin_unlock_irqrestore+0x18/0x1c
(early)  [<ffffffff805e3c3d>] ? _spin_unlock_irqrestore+0x18/0x1c
(early)  [<ffffffff80240e11>] ? release_console_sem+0x18f/0x1c4
(early)  [<ffffffff80241322>] ? vprintk+0x2b9/0x2e6
(early)  [<ffffffff802606ff>] smp_call_function_many+0x40/0x1f7
(early)  [<ffffffff802608d3>] smp_call_function+0x1d/0x21
(early)  [<ffffffff8020e2a2>] xen_smp_send_stop+0x14/0x16
(early)  [<ffffffff805e14d5>] panic+0x7d/0x11e
(early)  [<ffffffff80243a07>] do_exit+0x71/0x67f
(early)  [<ffffffff802142cd>] oops_end+0x97/0x9c
(early)  [<ffffffff80214484>] die+0x55/0x5e
(early)  [<ffffffff80212192>] do_trap+0x115/0x124
(early)  [<ffffffff80212551>] do_invalid_op+0x98/0xa1
(early)  [<ffffffff805c34b4>] ? xsave_cntxt_init+0xb5/0x194
(early)  [<ffffffff805e3c3d>] ? _spin_unlock_irqrestore+0x18/0x1c
(early)  [<ffffffff805e3c3d>] ? _spin_unlock_irqrestore+0x18/0x1c
(early)  [<ffffffff80240e11>] ? release_console_sem+0x18f/0x1c4
(early)  [<ffffffff8021151b>] invalid_op+0x1b/0x20
(early)  [<ffffffff805c34b4>] ? xsave_cntxt_init+0xb5/0x194
(early)  [<ffffffff805c34a4>] ? xsave_cntxt_init+0xa5/0x194
(early)  [<ffffffff805dab4f>] init_thread_xstate+0x12/0x20
(early)  [<ffffffff805dabcb>] fpu_init+0x6e/0xbe
(early)  [<ffffffff805dc728>] cpu_init+0x310/0x33c
(early)  [<ffffffff808339c5>] trap_init+0x5b0/0x5b7
(early)  [<ffffffff8082cb24>] start_kernel+0x1cb/0x365
(early)  [<ffffffff8082c2c1>] x86_64_start_reservations+0xac/0xb0
(early)  [<ffffffff80832dfd>] xen_start_kernel+0x814/0x823
(early) ---[ end trace 4eaa2a86a8e2da23 ]---

So I have :
> (early) Initializing CPU#0
> (early) invalid opcode: 0000 [#1] (early) SMP (early)

Should I consider it has a "CPU bug" ?
It's a Xeon E5405 stepping 10. I don't think it's so special, but my other dom0 seems to be Xeon E5405 stepping 6.


PS : is the "xen-devel" list more appropriate ?

Olivier B. a écrit :
So, the problem seem to come from my vanilla kernel : with the Debian kernel domU boot on this dom0.

I will try to find where is the problem. The RAID card is different on this dom0, but I was thinking this hadn't impact for domU.


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