[Qemu-devel] Re: virtio-blk XFS corruption

[Peter Lieven]

Am 25.09.2010 um 17:58 schrieb Christoph Hellwig:

> On Sat, Sep 25, 2010 at 05:40:34PM +0200, Peter Lieven wrote:
>> 
>> Am 25.09.2010 um 17:37 schrieb Christoph Hellwig:
>> 
>>> FYI, qemu 0.12.2 is missing:
>> 
>> you mean 0.12.4 not 0.12.2, don't you?
> 
> Yes, sorry. (but 0.12.2 is of course missing it, too..)

sure ;-)

> 
>>> which in the past was very good at triggering XFS guest corruption.
>>> Please try with the patch applied or even better latests qemu from git.
>>> 
>> 
>> i'm just trying with 0.12.5. 
>> 
>> i'm not so familiar with git. is there a command to pull only patches
>> that are marked as stable and will be in the next official release?
> 
> All the qemu stable releases are tagged and you can check do
> 
>       git-checkout v0.12.5
> 
> but that's not the main git HEAD which would also be interesting.
> 

thank you, i will first check with v0.12.5 and then later try git HEAD if it 
does not help.

while trying to start the vm with a ubuntu 10.04 lts desktop cd to repair the 
corrupted xfs i got the following emulation error with
v0.12.5. is this something i should worry about?

KVM internal error. Suberror: 1
rax 0000000000000100 rbx 0000000000000286 rcx 0000000000000000 rdx 
0000000000000000
rsi 0000000000000286 rdi ffff88011926a6ec rsp ffff880116dc5e98 rbp 
ffff880116dc5e98
r8  00007f0261f2b253 r9  0000000000000000 r10 00007f025fad8e90 r11 
0000000000000206
r12 ffff88011926a6e8 r13 00007f025fb0a480 r14 00007fff7428ea10 r15 
ffff880116df16f0
rip ffffffff81039719 rflags 00010086
cs 0010 (00000000/ffffffff p 1 dpl 0 db 0 s 1 type b l 1 g 1 avl 0)
ds 0000 (00000000/ffffffff p 0 dpl 0 db 0 s 0 type 0 l 0 g 0 avl 0)
es 0000 (00000000/ffffffff p 0 dpl 0 db 0 s 0 type 0 l 0 g 0 avl 0)
ss 0000 (00000000/ffffffff p 0 dpl 0 db 0 s 0 type 0 l 0 g 0 avl 0)
fs 0000 (7f02602047a0/ffffffff p 0 dpl 0 db 0 s 0 type 0 l 0 g 0 avl 0)
gs 0000 (ffff880028280000/ffffffff p 0 dpl 0 db 0 s 0 type 0 l 0 g 0 avl 0)
tr 0040 (ffff880028293780/00002087 p 1 dpl 0 db 0 s 0 type b l 0 g 0 avl 0)
ldt 0000 (00000000/ffffffff p 0 dpl 0 db 0 s 0 type 0 l 0 g 0 avl 0)
gdt ffff880028284000/7f
idt ffffffff81941000/fff
cr0 80050033 cr2 7f025fb0a480 cr3 11aebb000 cr4 6e0 cr8 0 efer 501
emulation failure, check dmesg for details

This reproducible happens if I try to boot this VM via CD. dmesg has no 
relevant entries...