[ kvm-Bugs-2841731 ] Guest migration fail on PAE host

["SourceForge.net" <noreply@sourceforge.net>]

Bugs item #2841731, was opened at 2009-08-21 00:19
Message generated for change (Settings changed) made by jiajun
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Category: qemu
Group: None
>Status: Closed
>Resolution: Fixed
Priority: 5
Private: No
Submitted By: Jiajun Xu (jiajun)
Assigned to: Nobody/Anonymous (nobody)
Summary: Guest migration fail on PAE host

Initial Comment:
Environment:
------------
Host OS (ia32/ia32e/IA64):pae
Guest OS (ia32/ia32e/IA64):pae
Kernel Commit:84a3c0818fe9d7a1e34c188d6182793f213a6a66
Userspace Commit:5d01efd67f08855a311c866c8fff0b68b5fd0690
Host Kernel Version: 2.6.31-rc2

Bug detailed description:
--------------------------
On PAE host, guest migration will fail with host kernel call trace. There is no such issue on 64-bit host.

And the latest kvm tree also has the same issue:
kvm.git: 779cc54dbccaa3a00d70a9d61d090be5d9ccc903
qemu.git: 9e3269181e9bc56feb43bcd4e8ce0b82cd543e65  

Host kernel call trace:
########
Pid: 12053, comm: qemu-system-x86 Tainted: G      D    (2.6.31-rc2 #1)
EIP: 0060:[<c043e023>] EFLAGS: 00210202 CPU: 0
EIP is at lock_hrtimer_base+0x11/0x33
EAX: f5d1541c EBX: 00000010 ECX: 000004a9 EDX: f5c1bc7c
ESI: f5d1541c EDI: f5c1bc7c EBP: f5c1bc74 ESP: f5c1bc68
 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
Process qemu-system-x86 (pid: 12053, ti=f5c1b000 task=f61cb410
task.ti=f5c1b000)
Stack:
 f5d1541c ffffffff 000004a9 f5c1bc8c c043e097 f9b7f7cb f5d1541c 00000000
<0> 000004a9 f5c1bc98 c043e0f0 f5d153d0 f5c1bcb0 f9b9b4df 00000000 bfd8a102
<0> f3c1e000 f5d15440 f5c1bcc0 f9b9b56d bfd8a10c f3c1e000 f5c1bda0 f9b8c26b
Call Trace:
 [<c043e097>] ? hrtimer_try_to_cancel+0x16/0x62
 [<f9b7f7cb>] ? kvm_flush_remote_tlbs+0xd/0x1a [kvm]
 [<c043e0f0>] ? hrtimer_cancel+0xd/0x18
 [<f9b9b4df>] ? pit_load_count+0x98/0x9e [kvm]
 [<f9b9b56d>] ? kvm_pit_load_count+0x21/0x35 [kvm]
 [<f9b8c26b>] ? kvm_arch_vm_ioctl+0x91e/0x9f5 [kvm]
 [<f9b7f3b4>] ? kvm_set_memory_region+0x2f/0x37 [kvm]
 [<f9b809c7>] ? kvm_vm_ioctl+0xafb/0xb45 [kvm]
 [<c043ddf8>] ? enqueue_hrtimer+0x5d/0x68
 [<c043e258>] ? __hrtimer_start_range_ns+0x15d/0x168
 [<c043e272>] ? hrtimer_start+0xf/0x11
 [<f9cd51cd>] ? vmx_vcpu_put+0x8/0xa [kvm_intel]
 [<f9b83e8b>] ? kvm_arch_vcpu_put+0x16/0x19 [kvm]
 [<f9b8b943>] ? kvm_arch_vcpu_ioctl+0x7d5/0x7df [kvm]
 [<c041f1e5>] ? kmap_atomic+0x14/0x16
 [<c046ec2f>] ? get_page_from_freelist+0x27c/0x2d2
 [<c046ed72>] ? __alloc_pages_nodemask+0xd7/0x402
 [<c04714a6>] ? lru_cache_add_lru+0x22/0x24
 [<f9b7f6b5>] ? kvm_dev_ioctl+0x22d/0x250 [kvm]
 [<f9b7fecc>] ? kvm_vm_ioctl+0x0/0xb45 [kvm]
 [<c049a9ab>] ? vfs_ioctl+0x22/0x67
 [<c049af1d>] ? do_vfs_ioctl+0x46c/0x4b7
 [<c05fb0fb>] ? sys_recv+0x18/0x1a
 [<c0446bef>] ? sys_futex+0xed/0x103
 [<c049afa8>] ? sys_ioctl+0x40/0x5a
 [<c04028a4>] ? sysenter_do_call+0x12/0x22
Code: c0 ff 45 e4 83 45 dc 24 83 7d e4 02 0f 85 cf fe ff ff 8d 65 f4 5b 5e 5f
5d c3 55 89 e5 57 89 d7 56 89 c6 53 8b 5e 20 85 db 74 17 <8b> 03 e8 0e dd 23 00
89 07 3b 5e 20 74 0d 89 c2 8b 03 e8 8a dd
EIP: [<c043e023>] lock_hrtimer_base+0x11/0x33 SS:ESP 0068:f5c1bc68
CR2: 0000000000000010
---[ end trace f747f57e7d1b76c8 ]---
########

Reproduce steps:
----------------
(1)qemu-img create -b /share/xvs/img/app/ia32p_SMP.img -f qcow2 /share/xvs/var/tmp-img_CPL_LM_40_1228273473_1
(2)qemu  -m 256  -net nic,macaddr=00:16:3e:39:78:1c,model=rtl8139 -net tap,script=/etc/kvm/qemu-ifup -hda /share/xvs/var/tmp-img_CPL_LM_40_1228273473_1 -incoming tcp:localhost:4444
(3) Press "Ctrl+Alt+2" to switch to qemu monitor
(4) Run "migrate tcp:localhost:4444"

----------------------------------------------------------------------

>Comment By: Jiajun Xu (jiajun)
Date: 2009-08-26 18:21

Message:
The bug is fixed by kvm.git: b4eba884776b5ab77fef1febbd3203e54a66d0bd.

Verified with kvm commit: 323d3b06db8bf2d8e4c5ed1a390668ae7b1b84bf and
qemu commit: f3600c589a9ee5ea4c0fec74ed4e06a15b461d52, the bug is fixed.

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=893831&aid=2841731&group_id=180599