[Xen-devel] 2.6.28.7 domU crashes

[Sven Köhler <sven.koehler@xxxxxxxxx>]

Hi,

below is the output of the kernel just before it goes down and crashes. 
I have to use "xm destroy" to kill it.
I have tried the enable/disable the "Optimize for Size" setting in the 
kernel. I hopes that it's some kind of compiler bug because of the 
"invalid opcode" thing. But actually I don't a clue what this might be 
caused by.
Do you have any idea?

The crash is very reproducable.


Regards,
  Sven


-Os

------------[ cut here ]------------
kernel BUG at /usr/src/linux-2.6.28/drivers/block/xen-blkfront.c:243!
invalid opcode: 0000 [#1]
last sysfs file: /sys/kernel/uevent_seqnum
CPU 0
Pid: 4841, comm: ebuild Not tainted 2.6.28.7 #5
RIP: e030:[<ffffffff803f22ef>]  [<ffffffff803f22ef>] 
do_blkif_request+0x156/0x312
RSP: e02b:ffffffff806fee08  EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 000000000000000a RDI: 0000000000002fe0
RBP: ffff88001a96ba50 R08: ffffffff806337f0 R09: ffff88001a96d540
R10: 000000000000003e R11: ffffffff8024d9eb R12: ffff88001a8c66f0
R13: ffff88001a914000 R14: ffff88000ef2d7c0 R15: ffff88001664b788
FS:  00007f712f92a6d0(0000) GS:ffffffff80707000(0000) knlGS:0000000000000000
CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f712e085024 CR3: 000000001a3de000 CR4: 0000000000000660
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process ebuild (pid: 4841, threadinfo ffff8800166aa000, task 
ffff8800167a4050)
Stack:
 0000000000000019 ffff88001a968800 ffff88001a914000 000005fc00000000
 000000000000000f 0000000000000002 0000000000000001 ffff88001a968820
 ffffffff00000001 ffff88001a968800 0000000000000000 ffff88001a96ba50
Call Trace:
 <IRQ> <0> [<ffffffff803a8d0a>] ? blk_invoke_request_fn+0x1e/0x3f
 [<ffffffff803f24c3>] ? kick_pending_request_queues+0x18/0x24
 [<ffffffff803f2f7a>] ? blkif_interrupt+0x1a0/0x1c2
 [<ffffffff80248d4b>] ? handle_IRQ_event+0x2c/0x61
 [<ffffffff8024a538>] ? handle_level_irq+0x5c/0xa0
 [<ffffffff802114d4>] ? do_IRQ+0x57/0xb3
 [<ffffffff803d2c68>] ? xen_evtchn_do_upcall+0x89/0xeb
 [<ffffffff8049f22e>] ? xen_do_hypervisor_callback+0x1e/0x30
 <EOI> <0>Code: 00 00 66 41 8b 46 2a 44 0f b7 e0 66 89 44 24 32 49 c1 
e4 04 4d 03 66 48 c7 44 24 34 00 00 00 00 e9 f4 00 00 00 80 7d 01 0b 75 
04 <0f> 0b eb fe 48 bf 00 00 00 00 00 1e 00 00 49 03 3c 24 48 b8 b7
RIP  [<ffffffff803f22ef>] do_blkif_request+0x156/0x312
 RSP <ffffffff806fee08>
Kernel panic - not syncing: Fatal exception in interrupt


-O2

------------[ cut here ]------------
kernel BUG at /usr/src/linux-2.6.28/drivers/block/xen-blkfront.c:243!
invalid opcode: 0000 [#1]
last sysfs file: /sys/kernel/uevent_seqnum
CPU 0
Pid: 4723, comm: ebuild Not tainted 2.6.28.7 #6
RIP: e030:[<ffffffff80449200>]  [<ffffffff80449200>] 
do_blkif_request+0x2f0/0x380
RSP: e02b:ffffffff80783df8  EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff88000505da40 RCX: ffff88000505da40
RDX: ffff88001a8c65a0 RSI: 000000000000000a RDI: 0000000000000520
RBP: ffff88001a96b3c0 R08: 0000000000002900 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000000001a R12: 0000000000000520
R13: 0000000000000002 R14: ffff88001a8c65b0 R15: 0000000000000000
FS:  00007fd37d7596d0(0000) GS:ffffffff8078c000(0000) knlGS:0000000000000000
CS:  e033 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00000000006c4900 CR3: 00000000162c9000 CR4: 0000000000000660
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process ebuild (pid: 4723, threadinfo ffff88001638c000, task 
ffff880016382450)
Stack:
 000000000000004c ffff88001a966800 ffff88001a914000 ffff88000501fd48
 000000008027c3d2 0000000000000015 ffff88001a914000 00000000803f0804
 ffff88000505da40 ffff88001a966820 ffffffff00000001 ffff88001a966800
Call Trace:
 <IRQ> <0> [<ffffffff803f0c73>] ? blk_invoke_request_fn+0x33/0x40
 [<ffffffff804492a8>] ? kick_pending_request_queues+0x18/0x30
 [<ffffffff80449ef3>] ? blkif_interrupt+0x1a3/0x1e0
 [<ffffffff80255639>] ? handle_IRQ_event+0x39/0x80
 [<ffffffff80257532>] ? handle_level_irq+0x52/0xc0
 [<ffffffff80212a3c>] ? do_IRQ+0x5c/0xd0
 [<ffffffff80423295>] ? xen_evtchn_do_upcall+0xa5/0xe0
 [<ffffffff802379db>] ? __do_softirq+0xab/0x140
 [<ffffffff805172ce>] ? xen_do_hypervisor_callback+0x1e/0x30
 <EOI> <0>Code: fa d0 00 00 00 48 8d bc 07 88 00 00 00 e8 89 c2 fb ff 
8b 7c 24 54 e8 20 93 fd ff ff 44 24 24 e9 3b fd ff ff 0f 0b eb fe 0f 1f 
00 <0f> 0b eb fe 48 8b 7c 24 30 48 8b 54 24 30 b9 0b 00 00 00 48 c7
RIP  [<ffffffff80449200>] do_blkif_request+0x2f0/0x380
 RSP <ffffffff80783df8>
Kernel panic - not syncing: Fatal exception in interrupt


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