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Re: [Xen-devel] xen-unstable c/s 19662 freezes up

from [Keir Fraser] [Permanent Link][Original]
To: Jan Beulich <JBeulich@xxxxxxxxxx>, Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
Subject: Re: [Xen-devel] xen-unstable c/s 19662 freezes up
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Thu, 28 May 2009 09:31:32 +0100
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
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Thread-topic: [Xen-devel] xen-unstable c/s 19662 freezes up
User-agent: Microsoft-Entourage/12.17.0.090302 
I'd say that's a concern in on_selected_cpus() too, although it tenmds to be
called with less volatile cpumasks. I will fix both.

 -- Keir

On 28/05/2009 08:57, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote:

> Hmm, that would seem to be a case where the to-be-flushed-cpus mask changes
> under the feet of flush_tlb_mask(). I'd suppose that passing &flush_cpumask
> rather than mask from flush_area_mask() to send_IPI_mask() should help - could
> you give this a try?
> 
> Jan
> 
>>>> Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> 28.05.09 00:10 >>>
>> From: Keir Fraser [mailto:keir.fraser@xxxxxxxxxxxxx]
>> Subject: Re: [Xen-devel] xen-unstable c/s 19662 freezes up
>> 
>> On 27/05/2009 22:24, "Dan Magenheimer"
>> <dan.magenheimer@xxxxxxxxxx> wrote:
>> 
>>> I'm getting a freeze consistently when launching a second PV domain
>>> on xen-unstable tip.  After spending hours assuming it was a tmem
>>> problem, I turned tmem off and reproduced it without tmem.  It
>>> appears from the dump that there is a locking problem in
>> grant tables.
>>> C/s 19658 perhaps?  I'll try backing that out.
>> 
>> Thanks. You can also build with debug=y to get a better
>> backtrace which will
>> only include functions which really are in the backtrace
>> (since debug builds
>> include frame pointers). The backtrace you provided is
>> probably 75% rubbish.
> 
> With 19658 backed out, I still get a freeze.  Now I am
> seeing it when launching the first domain.  Attached are
> dumps from two runs. flush_area_mask is the common denominator.
> 
> =====================================================================
> 
> (XEN) *** Serial input -> Xen (type 'CTRL-a' three times to switch input to
> DOM0
> )
> (XEN) 'd' pressed -> dumping registers
> (XEN)
> (XEN) *** Dumping CPU1 host state: ***
> (XEN) ----[ Xen-3.4.0-rc4-pre  x86_64  debug=y  Not tainted ]----
> (XEN) CPU:    1
> (XEN) RIP:    e008:[<ffff828c8010daed>] __dump_execstate+0x9/0x78
> (XEN) RFLAGS: 0000000000010292   CONTEXT: hypervisor
> (XEN) rax: 0000000000000000   rbx: 0000000000000064   rcx: 0000000000000001
> (XEN) rdx: 000000000000000a   rsi: 000000000000000a   rdi: 0000000000000000
> (XEN) rbp: ffff83007d4f73b8   rsp: ffff83007d4f73a8   r8:  0000000000000004
> (XEN) r9:  0000000000000004   r10: 0000000000000001   r11: 0000000000000001
> (XEN) r12: ffff83007d4f7548   r13: ffff828c8020be38   r14: 0000000000000286
> (XEN) r15: ffff83007d4f7548   cr0: 000000008005003b   cr4: 00000000000026f0
> (XEN) cr3: 000000007d2dc000   cr2: 000000000938c454
> (XEN) ds: 007b   es: 007b   fs: 0000   gs: 0000   ss: 0000   cs: e008
> (XEN) Xen stack trace from rsp=ffff83007d4f73a8:
> (XEN)    ffff83007d4f7548 0000000000000064 ffff83007d4f73e8 ffff828c8010e457
> (XEN)    0000000000000064 ffff83007d4f7548 ffff828c8020be38 0000000000000286
> (XEN)    ffff83007d4f7408 ffff828c8010dcdd ffff83007d4f7548 0000000000000064
> (XEN)    ffff83007d4f7418 ffff828c801307a9 ffff83007d4f7438 ffff828c80130878
> (XEN)    ffff828c8020bdc0 ffff828c801307ed ffff83007d4f7488 ffff828c80131c1d
> (XEN)    ffff83007d4f7458 ffff828c80130fbb 64ff83007d4f7488 0000000000000061
> (XEN)    ffff828c802ac5a0 ffff828c8020bdc0 ffff83007d4f7548 ffff83007d4f7f28
> (XEN)    ffff83007d4f74b8 ffff828c80131278 ffff83007d4f7548 ffff828c802a6900
> (XEN)    0000000000000000 ffff828c802be024 ffff83007d4f7538 ffff828c80151edd
> (XEN)    000000f17d4f7f28 ffff828c802be000 ffff828c802ac5c8 0000000000000000
> (XEN)    ffff83007d4f7518 ffff828c80166778 0000000000000000 ffff83007c808308
> (XEN)    ffff83007d4f7f28 ffff83007c808308 ffff83007d4f7f28 ffff828c801e81c0
> (XEN)    0000000000000000 0000000000000100 00007cff82b08a97 ffff828c8014ae46
> (XEN)    0000000000000100 0000000000000000 ffff828c801e81c0 ffff83007d4f7f28
> (XEN)    ffff83007d4f7628 ffff83007c808308 0000000000000000 290000000000005d
> (XEN)    0100000000000000 0800000000000000 fffffffffffffffd 0000000000000001
> (XEN)    ffff828c801e81d0 00000000000000fd ffff83007c808308 000000f100000000
> (XEN)    ffff828c80163311 000000000000e008 0000000000000202 ffff83007d4f75f8
> (XEN)    0000000000000000 ffff828c80163306 ffff828c8011b982 ffff83007d4f76e0
> (XEN)    00000000c381be38 0000000000000001 ffff83007d4f7da8 ffff83007d4f7f28
> (XEN) Xen call trace:
> (XEN)    [<ffff828c8010daed>] __dump_execstate+0x9/0x78
> (XEN)    [<ffff828c8010e457>] dump_registers+0x57/0x140
> (XEN)    [<ffff828c8010dcdd>] handle_keypress+0x76/0x95
> (XEN)    [<ffff828c801307a9>] __serial_rx+0x16/0x5a
> (XEN)    [<ffff828c80130878>] serial_rx+0x8b/0x90
> (XEN)    [<ffff828c80131c1d>] serial_rx_interrupt+0xab/0xc1
> (XEN)    [<ffff828c80131278>] ns16550_interrupt+0x47/0x61
> (XEN)    [<ffff828c80151edd>] do_IRQ+0x476/0x4fd
> (XEN)    [<ffff828c8014ae46>] common_interrupt+0x26/0x30
> (XEN)    [<ffff828c80163311>] flush_area_mask+0x113/0x13e
> (XEN)    [<ffff828c8010c01e>] do_grant_table_op+0xf34/0x16d9
> (XEN)    [<ffff828c8010c9dd>] compat_grant_table_op+0x21a/0x9dd
> (XEN)    [<ffff828c801e5bd0>] compat_hypercall+0xc0/0x119
> (XEN)
> (XEN) *** Dumping CPU1 guest state: ***
> (XEN) ----[ Xen-3.4.0-rc4-pre  x86_64  debug=y  Not tainted ]----
> (XEN) CPU:    1
> (XEN) RIP:    0061:[<00000000c0101287>]
> (XEN) RFLAGS: 0000000000000246   EM: 0   CONTEXT: pv guest
> (XEN) rax: 0000000000000014   rbx: 0000000000000001   rcx: 00000000c381be20
> (XEN) rdx: 0000000000000001   rsi: 00000000cfd64214   rdi: 000000000000011f
> (XEN) rbp: 00000000c381be38   rsp: 00000000c381be0c   r8:  0000000000000000
> (XEN) r9:  0000000000000000   r10: 0000000000000000   r11: 0000000000000000
> (XEN) r12: 0000000000000000   r13: 0000000000000000   r14: 0000000000000000
> (XEN) r15: 0000000000000000   cr0: 000000008005003b   cr4: 00000000000026f0
> (XEN) cr3: 000000007d2dc000   cr2: 00000000b7e2a2c0
> (XEN) ds: 007b   es: 007b   fs: 0000   gs: 0000   ss: 0069   cs: 0061
> (XEN) Guest stack trace from esp=c381be0c:
> (XEN)   c025541b c381be20 cff0b1b0 00000001 00000001 cf263000 00000000
> 00000000
> (XEN)   00000000 0000011f cfac0000 c1219f80 c381bea4 c011e7e1 00000000
> c11e4c60
> (XEN)   c040fb80 c7758000 00000063 80000000 80000000 c381bfc0 00001000
> cf587000
> (XEN)   00000000 cf588000 cf264000 cf587000 c0248ac6 cf263000 00000000
> c381bfc0
> (XEN)   00001000 00001000 c0247829 00000000 c11e4c60 00000000 4a1db591
> c85b7f00
> (XEN)   ca611f48 c012a920 3b9aca00 cfb1dc00 ca611e9c c85b7f00 ca611f48
> 000dbb81
> (XEN)   c0195dad 4a1db591 00000000 c85b7f00 c85b7f00 c0155688 00001000
> 00000001
> (XEN)   c85b7f00 c85b7f48 ca611e9c 004fffff 00000000 000dbb81 000dbb81
> 000dbb7f
> (XEN)   00000000 00000005 00000000 000dbb81 00001000 000dbb80 00000008
> cb6b3540
> (XEN)   00000000 cff0b1b0 00000000 c02556b7 00000020 00000000 cb6b3540
> 00000000
> (XEN)   c0255740 c0255771 cb6b3540 00001000 c01800aa c381bf68 c0247780
> 00001000
> (XEN)   00000000 00000000 cb6b3540 dbb80000 00000000 c0248d29 c0247780
> c381bfc0
> (XEN)   00000000 cf2c0220 cf2c0240 cf2c0230 0000001e cf2c0134 cb6b3540
> 00000001
> (XEN)   00000000 c0248f20 00001000 00000001 00001000 cf2c0134 c11e4c60
> 00001000
> (XEN)   00001000 dbb81000 00000000 c0248b00 00000000 00000000 00000000
> c0103005
> (XEN)   cf2c0134 00000000 00000000 00000000 00000000 00000013 00000000
> 00a16c20
> (XEN)   00a16c20 00000000 00000019 00000f90 00000f30 00000002 00a19cc0
> 000000b7
> (XEN)   ffffffff 00000000 57206e4f 6f646e69 202c7377 656d6f73 66656420
> 746c7561
> (XEN)   636e6520 6e69646f 61207367 6e206572 7020746f 69766f72 20646564
> 50207962
> (XEN)   6f687479 200a2c6e 77202020 656c6968 65687420 72612079 6c612065
> 73796177
> (XEN)
> (XEN) *** Dumping CPU0 host state: ***
> (XEN) ----[ Xen-3.4.0-rc4-pre  x86_64  debug=y  Not tainted ]----
> (XEN) CPU:    0
> (XEN) RIP:    e008:[<ffff828c8010daed>] __dump_execstate+0x9/0x78
> (XEN) RFLAGS: 0000000000010092   CONTEXT: hypervisor
> (XEN) rax: ffff83007d4f7358   rbx: ffff828c8020d6a4   rcx: ffff828c8028ff28
> (XEN) rdx: ffff828c802a6900   rsi: ffff828c8010dae4   rdi: 0000000000000000
> (XEN) rbp: ffff828c8028fda8   rsp: ffff828c8028fd98   r8:  0000000000000000
> (XEN) r9:  ffff83007d2d8000   r10: 00000000deadbeef   r11: 0000000000000000
> (XEN) r12: ffff828c8028ff28   r13: ffff828c801e81c0   r14: 0000000000000000
> (XEN) r15: 0000000000000100   cr0: 000000008005003b   cr4: 00000000000026f0
> (XEN) cr3: 000000007d2d7000   cr2: 00000000c16373c0
> (XEN) ds: 007b   es: 007b   fs: 0000   gs: 0000   ss: 0000   cs: e008
> (XEN) Xen stack trace from rsp=ffff828c8028fd98:
> (XEN)    ffff828c8028fdc8 ffff828c8020d6a4 ffff828c8028fdb8 ffff828c80162d05
> (XEN)    ffff828c8028fdc8 ffff828c80162d80 00007d737fd70207 ffff828c8014bf00
> (XEN)    0000000000000100 0000000000000000 ffff828c801e81c0 ffff828c8028ff28
> (XEN)    ffff828c8028fe88 ffff828c8020d6a4 0000000000000000 00000000deadbeef
> (XEN)    ffff83007d2d8000 0000000000000000 0000000000000000 0000000000000000
> (XEN)    0000000000000202 0000000000000000 ffff828c8020d6a8 000000fb00000000
> (XEN)    ffff828c8011b984 000000000000e008 0000000000000246 ffff828c8028fe80
> (XEN)    0000000000000000 ffff828c8028fed8 ffff828c8028fec8 ffff828c801632b5
> (XEN)    00007ff001c9c380 0000000000000000 ffff828c8028ff28 ffff828c802a7900
> (XEN)    0000000000000000 0000000000000000 ffff828c8028fee8 ffff828c8016337d
> (XEN)    0000000000000002 ffff83007d2d8000 ffff828c8028ff18 ffff828c8011b4c7
> (XEN)    0000000000000000 ffff83007d2d8000 0000000000000000 0000000000000000
> (XEN)    00007d737fd700b7 ffff828c801e5ca6 0000000000000000 0000000000000000
> (XEN)    0000000000000000 0000000000000000 00000000c12e1fa4 00000000deadbeef
> (XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
> (XEN)    0000000000000000 00000000deadbeef 00000000deadbeef 00000000deadbeef
> (XEN)    00000000c92dc040 0000010000000000 00000000c0101347 0000000000000061
> (XEN)    0000000000000a17 00000000c12e1f28 0000000000000069 0000000000000000
> (XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
> (XEN)    ffff83007d2d8000
> (XEN) Xen call trace:
> (XEN)    [<ffff828c8010daed>] __dump_execstate+0x9/0x78
> (XEN)    [<ffff828c80162d05>] __smp_call_function_interrupt+0x5e/0xa6
> (XEN)    [<ffff828c80162d80>] smp_call_function_interrupt+0x33/0x35
> (XEN)    [<ffff828c8014bf00>] call_function_interrupt+0x30/0x40
> (XEN)    [<ffff828c8011b984>] _spin_lock+0x13/0x2d
> (XEN)    [<ffff828c801632b5>] flush_area_mask+0xb7/0x13e
> (XEN)    [<ffff828c8016337d>] new_tlbflush_clock_period+0x41/0x74
> (XEN)    [<ffff828c8011b4c7>] do_softirq+0x6a/0x77
> (XEN)
> (XEN) *** Dumping CPU0 guest state: ***
> (XEN) ----[ Xen-3.4.0-rc4-pre  x86_64  debug=y  Not tainted ]----
> (XEN) CPU:    0
> (XEN) RIP:    0061:[<00000000c0101347>]
> (XEN) RFLAGS: 0000000000000a17   EM: 1   CONTEXT: pv guest
> (XEN) rax: 0000000000000000   rbx: 00000000deadbeef   rcx: 00000000deadbeef
> (XEN) rdx: 00000000deadbeef   rsi: 00000000deadbeef   rdi: 00000000c92dc040
> (XEN) rbp: 00000000c12e1fa4   rsp: 00000000c12e1f28   r8:  0000000000000000
> (XEN) r9:  0000000000000000   r10: 0000000000000000   r11: 0000000000000000
> (XEN) r12: 0000000000000000   r13: 0000000000000000   r14: 0000000000000000
> (XEN) r15: 0000000000000000   cr0: 000000008005003b   cr4: 00000000000026f0
> (XEN) cr3: 000000007d2d7000   cr2: 00000000b3678000
> (XEN) ds: 007b   es: 007b   fs: 0000   gs: 0000   ss: 0069   cs: 0061
> (XEN) Guest stack trace from esp=c12e1f28:
> (XEN)   c030290a 00000001 00000002 00000001 00000000 c040f180 3ca25230
> 0000002b
> (XEN)   c12e1f78 00000001 c12dd080 c8e46c90 3d3a3243 0000002b 0097e013
> c12dd1a8
> (XEN)   c1219f80 0000021a 00000000 c1219fc4 00000005 00073c1c 00000061
> 00000246
> (XEN)   c0108df2 4048bcdf 0000002b 00000000 00000000 ffffffff 00000001
> c040f180
> (XEN)   c01036f1 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000
> (XEN)   00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000
> (XEN)   00000000 00000000 00000000 00000000 00000000 00000000 c12dcb10
> c035c8a0
> (XEN)   00000000 00000000 00000000 00000000 ffffffff 00000000 c0130ba0
> 00000000
> (XEN)   00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000
> (XEN)   00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000
> (XEN)   00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000
> (XEN)   00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000
> (XEN)   00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000
> (XEN)   00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000
> (XEN)   00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000
> (XEN)   00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000
> (XEN)   00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000
> (XEN)   00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000
> (XEN)   00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000
> (XEN)   00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000
> (XEN)
> 
> ==============================================================================
> 
> (XEN) *** Serial input -> Xen (type 'CTRL-a' three times to switch input to
> DOM0
> )
> (XEN) 'd' pressed -> dumping registers
> (XEN)
> (XEN) *** Dumping CPU1 host state: ***
> (XEN) ----[ Xen-3.4.0-rc4-pre  x86_64  debug=y  Not tainted ]----
> (XEN) CPU:    1
> (XEN) RIP:    e008:[<ffff828c8010daed>] __dump_execstate+0x9/0x78
> (XEN) RFLAGS: 0000000000210296   CONTEXT: hypervisor
> (XEN) rax: 0000000000000000   rbx: 0000000000000064   rcx: 0000000000000001
> (XEN) rdx: 000000000000000a   rsi: 000000000000000a   rdi: 0000000000000000
> (XEN) rbp: ffff83007d4f7b38   rsp: ffff83007d4f7b28   r8:  0000000000000004
> (XEN) r9:  0000000000000004   r10: 0000000000000001   r11: 0000000000000001
> (XEN) r12: ffff83007d4f7cc8   r13: ffff828c8020be38   r14: 0000000000200282
> (XEN) r15: ffff83007d4f7cc8   cr0: 000000008005003b   cr4: 00000000000026f0
> (XEN) cr3: 000000007d2dc000   cr2: 00000000c28ddd58
> (XEN) ds: 007b   es: 007b   fs: 0000   gs: 0033   ss: 0000   cs: e008
> (XEN) Xen stack trace from rsp=ffff83007d4f7b28:
> (XEN)    ffff83007d4f7cc8 0000000000000064 ffff83007d4f7b68 ffff828c8010e457
> (XEN)    0000000000000064 ffff83007d4f7cc8 ffff828c8020be38 0000000000200282
> (XEN)    ffff83007d4f7b88 ffff828c8010dcdd ffff83007d4f7cc8 0000000000000064
> (XEN)    ffff83007d4f7b98 ffff828c801307a9 ffff83007d4f7bb8 ffff828c80130878
> (XEN)    ffff828c8020bdc0 ffff828c801307ed ffff83007d4f7c08 ffff828c80131c1d
> (XEN)    ffff83007d4f7bd8 ffff828c80130fbb 64ff83007d4f7c08 0000000000000061
> (XEN)    ffff828c802ac5a0 ffff828c8020bdc0 ffff83007d4f7cc8 ffff83007d4f7f28
> (XEN)    ffff83007d4f7c38 ffff828c80131278 ffff83007d4f7cc8 ffff828c802a6900
> (XEN)    0000000000000000 ffff828c802be024 ffff83007d4f7cb8 ffff828c80151edd
> (XEN)    000000f100000000 ffff828c802be000 ffff828c802ac5c8 ffff828c80159ad7
> (XEN)    000000007d4f7ca8 2000000000000000 0000000000000000 000000000006fd5a
> (XEN)    ffff830070f7f000 ffff83007c808308 ffff83007d4f7f28 ffff828c801e81c0
> (XEN)    0000000000000000 0000000000000100 00007cff82b08317 ffff828c8014ae46
> (XEN)    0000000000000100 0000000000000000 ffff828c801e81c0 ffff83007d4f7f28
> (XEN)    ffff83007d4f7da8 ffff83007c808308 0000000000000000 ffff828c801ed820
> (XEN)    00000000cb2f3e4c 0000000000000000 fffffffffffffffd 0000000000000001
> (XEN)    ffff828c801e81d0 00000000000000fd ffff83007c808308 000000f100000000
> (XEN)    ffff828c80163318 000000000000e008 0000000000200202 ffff83007d4f7d78
> (XEN)    0000000000000000 ffff828c80163306 0000000000000000 0000000000000002
> (XEN)    ffff828c80246560 0000000000000000 ffff828c80246798 0000000000000001
> (XEN) Xen call trace:
> (XEN)    [<ffff828c8010daed>] __dump_execstate+0x9/0x78
> (XEN)    [<ffff828c8010e457>] dump_registers+0x57/0x140
> (XEN)    [<ffff828c8010dcdd>] handle_keypress+0x76/0x95
> (XEN)    [<ffff828c801307a9>] __serial_rx+0x16/0x5a
> (XEN)    [<ffff828c80130878>] serial_rx+0x8b/0x90
> (XEN)    [<ffff828c80131c1d>] serial_rx_interrupt+0xab/0xc1
> (XEN)    [<ffff828c80131278>] ns16550_interrupt+0x47/0x61
> (XEN)    [<ffff828c80151edd>] do_IRQ+0x476/0x4fd
> (XEN)    [<ffff828c8014ae46>] common_interrupt+0x26/0x30
> (XEN)    [<ffff828c80163318>] flush_area_mask+0x11a/0x13e
> (XEN)    [<ffff828c8015a840>] process_deferred_ops+0x64/0x9a
> (XEN)    [<ffff828c8015dd7f>] do_mmuext_op+0x111f/0x11b4
> (XEN)    [<ffff828c801dbb80>] compat_mmuext_op+0x31d/0x455
> (XEN)    [<ffff828c801e5bd0>] compat_hypercall+0xc0/0x119
> (XEN)
> (XEN) *** Dumping CPU1 guest state: ***
> (XEN) ----[ Xen-3.4.0-rc4-pre  x86_64  debug=y  Not tainted ]----
> (XEN) CPU:    1
> (XEN) RIP:    0061:[<00000000c0101347>]
> (XEN) RFLAGS: 0000000000200246   EM: 0   CONTEXT: pv guest
> (XEN) rax: 000000000000001a   rbx: 00000000cb2f3e4c   rcx: 0000000000000001
> (XEN) rdx: 0000000000000000   rsi: 0000000000007ff0   rdi: 0000000000000000
> (XEN) rbp: 0000000000000001   rsp: 00000000cb2f3e48   r8:  0000000000000000
> (XEN) r9:  0000000000000000   r10: 0000000000000000   r11: 0000000000000000
> (XEN) r12: 0000000000000000   r13: 0000000000000000   r14: 0000000000000000
> (XEN) r15: 0000000000000000   cr0: 000000008005003b   cr4: 00000000000026f0
> (XEN) cr3: 000000007d2dc000   cr2: 0000000043dcc260
> (XEN) ds: 007b   es: 007b   fs: 0000   gs: 0033   ss: 0069   cs: 0061
> (XEN) Guest stack trace from esp=cb2f3e48:
> (XEN)   c011c0f5 0000000a 00000000 b6d32000 deadbeef deadbeef c011982d
> c0119d10
> (XEN)   cb2f3e94 00000000 000106bc 0006b897 b6d32000 ccc40200 cba2b000
> b6d32000
> (XEN)   ffffffff ffffffff 00001000 cba2b010 00000027 00000000 cb2f3f54
> c4d50000
> (XEN)   c0267f6f 00001000 00000027 00000000 00000001 80000000 65628225
> 80000000
> (XEN)   00000754 ccc40234 000001d5 cc6a4be8 00000000 c01ea221 cb2f3efc
> d05a877c
> (XEN)   00000000 b7fac000 d05a8754 b6bcb000 000001d5 000001d5 00000000
> 00000167
> (XEN)   d05a8754 ccc40200 c1cb5804 c015f48f 00000000 cc6a4bd0 b6d32000
> 000001d5
> (XEN)   bf9c0001 b6bcb000 00000000 0834a658 c5bc8540 c016a350 000001d5
> c1cb5820
> (XEN)   00000000 c5bc8540 00000000 c4d50000 c4d50000 c02678f0 c5bc8540
> bf9cdbf8
> (XEN)   00145003 c018dc7b 00000010 00000000 c5bc8540 00000010 cb2f2000
> c018dd3c
> (XEN)   00145003 00000000 00000000 c5bc8540 bf9cdbf8 cb2f2000 c018e002
> bf9cdbf8
> (XEN)   00000001 00000010 000001d5 001d5000 c01059bf 00000010 00145003
> bf9cdbf8
> (XEN)   000001d5 001d5000 b6bcb000 ffffffda c010007b c010007b 00000036
> b7faf410
> (XEN)   00000073 00200293 bf9cdba8 0000007b ffffffff ffffffff 353ee824
> 458bffff
> (XEN)   053365f0 00000014 01cd850f c4810000 0000008c 5d5f5e5b 90458dc3
> 14244489
> (XEN)   8994458d 8d0c2444 ff8caf83 244489ff 98458b04 182444c7 00000000
> 102444c7
> (XEN)   00000073 082444c7 00000073 8900b70f 11e82404 89ffffcb fef4e9c6
> 838bffff
> (XEN)   ffffffa8 082444c7 00000000 04244489 8b98458b 04893840 f29ae824
> 458b0000
> (XEN)   38408b98 e8240489 0000f2bc 8b98458b 40c74450 00000038 0fd28500
> 00009284
> (XEN)   24448900 70838d0c 89fffe3e 8b082444 001cd483 24548900 24048904
> 0009a7e8
> (XEN)
> (XEN) *** Dumping CPU0 host state: ***
> (XEN) ----[ Xen-3.4.0-rc4-pre  x86_64  debug=y  Not tainted ]----
> (XEN) CPU:    0
> (XEN) RIP:    e008:[<ffff828c8010daed>] __dump_execstate+0x9/0x78
> (XEN) RFLAGS: 0000000000210092   CONTEXT: hypervisor
> (XEN) rax: ffff83007d4f7ad8   rbx: ffff828c8020d6a4   rcx: ffff828c8028ff28
> (XEN) rdx: ffff828c802a6900   rsi: ffff828c8010dae4   rdi: 0000000000000000
> (XEN) rbp: ffff828c8028fb08   rsp: ffff828c8028faf8   r8:  0000000000000000
> (XEN) r9:  0100000000000000   r10: 4900000000000002   r11: 0000000000000000
> (XEN) r12: ffff828c8028ff28   r13: ffff828c801e81c0   r14: 0000000000000000
> (XEN) r15: 0000000000000100   cr0: 0000000080050033   cr4: 00000000000026f0
> (XEN) cr3: 000000007d2d7000   cr2: ffff81000059b220
> (XEN) ds: 007b   es: 007b   fs: 0000   gs: 0033   ss: 0000   cs: e008
> (XEN) Xen stack trace from rsp=ffff828c8028faf8:
> (XEN)    ffff83007c808000 ffff828c8020d6a4 ffff828c8028fb18 ffff828c80162d05
> (XEN)    ffff828c8028fb28 ffff828c80162d80 00007d737fd704a7 ffff828c8014bf00
> (XEN)    0000000000000100 0000000000000000 ffff828c801e81c0 ffff828c8028ff28
> (XEN)    ffff828c8028fbe8 ffff828c8020d6a4 0000000000000000 4900000000000002
> (XEN)    0100000000000000 0000000000000000 0000000000000000 0000000000000000
> (XEN)    0000000000200202 00000000000026f0 ffff828c8020d6a8 000000fb00000000
> (XEN)    ffff828c8011b984 000000000000e008 0000000000200246 ffff828c8028fbe0
> (XEN)    0000000000000000 ffff828c8028fd28 ffff828c8028fc28 ffff828c801632b5
> (XEN)    ffff828c8028fc48 0000000000000020 e800000000000001 ffff828400000000
> (XEN)    ffff828400f06e80 e800000000000000 ffff828c8028fd68 ffff828c80158801
> (XEN)    ffff828400dfa040 ffff828400000000 0000000000000000 6000000000000000
> (XEN)    ffff828c8028fc68 ffff828c80159ad7 000000008028fca8 2000000000000000
> (XEN)    000000008028fc88 000000000006fd02 0000000000000027 ffff83007d2d8000
> (XEN)    ffff828400e12520 0000000070929027 000000006fd02027 ffff83007d2d7000
> (XEN)    ffff828c8028fcc8 0000000000000000 ffff828c8028fce8 ffff828c801581de
> (XEN)    ffff83007d2d8000 000000006fd02027 ffff828c8028fd98 ffff828c8015ca00
> (XEN)    0000000080244100 a000000000000000 ffff828c8028fd58 ffff828c8015638f
> (XEN)    ffff828c8011b982 0000000000000000 0000000000000003 0000000000078374
> (XEN)    0000000000078374 00000000ffffffea ffff828400f06e80 ffff828400000000
> (XEN)    0000000000000000 2000000000000000 ffff828c8028fd78 ffff828c80159ad7
> (XEN) Xen call trace:
> (XEN)    [<ffff828c8010daed>] __dump_execstate+0x9/0x78
> (XEN)    [<ffff828c80162d05>] __smp_call_function_interrupt+0x5e/0xa6
> (XEN)    [<ffff828c80162d80>] smp_call_function_interrupt+0x33/0x35
> (XEN)    [<ffff828c8014bf00>] call_function_interrupt+0x30/0x40
> (XEN)    [<ffff828c8011b984>] _spin_lock+0x13/0x2d
> (XEN)    [<ffff828c801632b5>] flush_area_mask+0xb7/0x13e
> (XEN)    [<ffff828c80158801>] __get_page_type+0x244/0x14fc
> (XEN)    [<ffff828c80159ad7>] get_page_type+0xe/0x39
> (XEN)    [<ffff828c8015a1b8>] get_page_and_type_from_pagenr+0x6e/0xa0
> (XEN)    [<ffff828c801583fe>] get_page_from_l2e+0xf1/0x2b0
> (XEN)    [<ffff828c8015f484>] do_mmu_update+0x77e/0x13da
> (XEN)    [<ffff828c801e5bd0>] compat_hypercall+0xc0/0x119
> (XEN)
> (XEN) *** Dumping CPU0 guest state: ***
> (XEN) ----[ Xen-3.4.0-rc4-pre  x86_64  debug=y  Not tainted ]----
> (XEN) CPU:    0
> (XEN) RIP:    0061:[<00000000c0101027>]
> (XEN) RFLAGS: 0000000000200246   EM: 0   CONTEXT: pv guest
> (XEN) rax: 0000000000000001   rbx: 00000000c5011da4   rcx: 0000000000000001
> (XEN) rdx: 0000000000000000   rsi: 0000000000007ff0   rdi: 0000000000000000
> (XEN) rbp: 0000000080000000   rsp: 00000000c5011d98   r8:  0000000000000000
> (XEN) r9:  0000000000000000   r10: 0000000000000000   r11: 0000000000000000
> (XEN) r12: 0000000000000000   r13: 0000000000000000   r14: 0000000000000000
> (XEN) r15: 0000000000000000   cr0: 0000000080050033   cr4: 00000000000026f0
> (XEN) cr3: 000000007d2d7000   cr2: 00000000b3644000
> (XEN) ds: 007b   es: 007b   fs: 0000   gs: 0033   ss: 0069   cs: 0061
> (XEN) Guest stack trace from esp=c5011d98:
> (XEN)   c011c6ea 78374067 00000000 703d5cd8 00000000 78374067 00000000
> 00000000
> (XEN)   78374067 00000000 c0163ede c562acd8 cbaf0ac0 0d68b000 00000000
> 00000001
> (XEN)   00000000 00000000 cbaf0ac0 c0164ec1 c4043594 00000000 c01936d7
> cc89b9e8
> (XEN)   00000000 c0411f80 c5011f34 b3644000 c1cb538c cbaf0ac0 00000000
> 00000000
> (XEN)   00000000 00000000 00000000 00000000 c562acd8 c12a74c0 c01979a4
> 00000000
> (XEN)   c12a74c0 081bd758 081bd000 c0168a1d 081bd758 081bd000 c5011e88
> c013e857
> (XEN)   fffffffc 00000000 00000020 00000000 c5041c00 00000000 001ad140
> c03109c0
> (XEN)   00000001 00300063 80000000 80000000 00000001 c11ad140 00000001
> 00000002
> (XEN)   c1cb538c cbaf0ac0 c01187fc 00000001 c018b8e4 c017bacf c0363b80
> c11ad140
> (XEN)   00000001 c5011f0c cbaf0af4 ccc1b380 b3644000 ffffffff c01ecb8b
> 00000000
> (XEN)   00000000 0000000a ffffffff ffffffff 00000002 00000000 32975fff
> cd68a000
> (XEN)   c44eda00 cd68a000 c01186f0 c44eda14 c0105b6b c44eda00 00000002
> cd68a000
> (XEN)   cd68a000 b3644000 c44eda14 00000002 c501007b c015007b ffffffff
> c01ed7e2
> (XEN)   00000061 00210293 00000002 00000000 c01bc7f9 00000002 00000000
> 00001000
> (XEN)   00000000 00000002 b3644000 cd32269c c03725d0 cd880780 b3644000
> c5011fa4
> (XEN)   00001000 c017ae0c c5011fa4 00001000 c01bc700 cd880780 fffffff7
> b796bbb4
> (XEN)   c5010000 c017b391 c5011fa4 00000000 00000000 00000001 00000018
> 082e4270
> (XEN)   c01059bf 00000018 b3644000 00001000 082e4270 b796bbb4 b70d59c0
> ffffffda
> (XEN)   0000007b c010007b 00000003 b7fa2410 00000073 00200246 b70d5998
> 0000007b
> (XEN)   00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000
> (XEN)
> 
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