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Re: [Xen-users] Problems converting FC8 HVM guest to PV

To: Xen <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-users] Problems converting FC8 HVM guest to PV
From: Evan Lavelle <sa212+xen@xxxxxxxxxxx>
Date: Sat, 29 Dec 2007 21:09:43 +0000
Cc: Nico Kadel-Garcia <nkadel@xxxxxxxxx>
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Nico Kadel-Garcia wrote:

Can you do a fast, clean FC8 PV install

Ummm... no. Is that even possible? :)

and test Wine on it?

I needed another FC8 PV guest anyway, so I gave this a go. I used virt-install from HTTP:

 Dom0 FC8 x86_64, kernel 2.6.21-2952
 DomU FC8 x86_64, kernel 2.6.21-2950, PV, on LVM
 Intel Core 2 Duo/6600

xm info reports Xen 3.1, though various log messages report 3.0.

I then installed Wine and the Windows app. The Windows installer ran fine under Wine, as well as the licensing. The app itself also runs Ok until it exits, at which point I get the crash. Kernel output attached (the output is actually for the crash of the i386 DomU that I converted from HVM, with kernel 2952, but it seems identical at first sight).

evan 57 > ------------[ cut here ]------------
kernel BUG at include/linux/tracehook.h:369!  
invalid opcode: 0000 [#1]                   
last sysfs file: /class/net/eth5/address
Modules linked in: ipt_MASQUERADE(U) iptable_nat(U) nf_nat(U) bridge(U) 
rfcomm(U) l2cap(U) bluetooth(U) autofs4(U) sunrpc(U) 8139cp(U) mii(U) 
nf_conntrack_ipv4(U) ipt_REJECT(U) iptable_filter(U) ip_tables(U) 
nf_conntrack_netbios_ns(U) nf_conntrack_ipv6(U) xt_state(U) nf_conntrack(U) 
nfnetlink(U) xt_tcpudp(U) ip6t_ipv6header(U) ip6t_REJECT(U) ip6table_filter(U) 
ip6_tables(U) x_tables(U) ipv6(U) dm_mirror(U) dm_multipath(U) dm_mod(U) 
pcspkr(U) ata_piix(U) libata(U) sd_mod(U) scsi_mod(U) ext3(U) jbd(U) mbcache(U) 
uhci_hcd(U) ohci_hcd(U) ehci_hcd(U) xennet(U) xenblk(U)
CPU:    0                                                                
EIP:    0061:[<c10254df>]    Not tainted VLI
EFLAGS: 00210087   (2.6.21-2952.fc8xen #1)  
EIP is at release_task+0x38/0x2f1         
eax: c12ff000   ebx: ebdfb050   ecx: f5416000   edx: 00000000
esi: ebdfb050   edi: 00000000   ebp: 00000001   esp: ebe28e68
ds: 007b   es: 007b   fs: 00d8  gs: 0000  ss: 0069           
Process vsimk.exe (pid: 2185, ti=ebe28000 task=ebdfaaf0 task.ti=ebe28000)
Stack: 00000020 ebdfaaf0 00000000 ed7c15b0 c1026918 00000009 00000008 00000000 
       ebdfaf44 ebdfaf44 ebdfaba4 00000000 ebdc7b64 ec353900 00000000 ebe28fb8 
       c10269fb ebdc7b64 00000009 00000014 c102dcb2 00000001 ebe28ee4 c101c9ac 
Call Trace:                                                                    
 [<c1026918>] do_exit+0x6d6/0x730
 [<c10269fb>] sys_exit_group+0x0/0xd
 [<c102dcb2>] get_signal_to_deliver+0x3d2/0x414
 [<c101c9ac>] __wake_up_common+0x32/0x55       
 [<c1004be7>] do_notify_resume+0x8c/0x6e6
 [<c1096769>] ep_poll_callback+0x56/0x77 
 [<c101c9ac>] __wake_up_common+0x32/0x55
 [<c1204744>] kprobe_flush_task+0x4b/0x80
 [<c1200554>] __sched_text_start+0x7cc/0x83f
 [<c1077075>] pipe_release+0x82/0x8b        
 [<c1005765>] work_notifysig+0x13/0x1a
Code: 98 04 00 00 00 74 07 89 f0 e8 e6 98 02 00 8b 86 80 01 00 00 90 ff 48 04 
b8 00 f0 2f c1 e8 b5 c7 1d 00 83 be 90 00 00 00 20 74 04 <0f> 0b eb fe 83 be 98 
04 00 00 00 74 27 8d 86 a8 04 00 00 e8 de 
EIP: [<c10254df>] release_task+0x38/0x2f1 SS:ESP 0069:ebe28e68
Fixing recursive fault but reboot is needed! 
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