Re: [Xen-devel] RE: 3.0.3rc2 BUG: LVM backed qcow image not working?

[Timo Benk <timo.benk@xxxxxx>]

Thats also interesting ...

xendom0:~ # ps -ef  | grep mount
Segmentation fault

Timo Benk wrote:
> Next try,
> 
> using a logical partition ...
> 
> === prepare image partition ===
> # mkreiserfs /dev/hdc5
> # mount /dev/hdc5 /var/lib/xen/images
> 
> === prepare base partition ===
> # mkreiserfs /dev/hdc6
> # mount /dev/hdc6 /mnt
> # tar cpjf domu-base.tar.bz2 -C /mnt
> 
> === create file backed qcow image ===
> # qcow-create 5120 /var/lib/xen/images/xengate_root.qcow
>     /dev/hdc6
> # xm block-attach Domain-0
>     tap:qcow:/var/lib/xen/images/xengate_root.qcow xvda1 w 0
> # mount /dev/xvda1 /mnt
> [... changing some files ...]
> 
> # umount /mnt
> [... umount is hanging forever ...]
> 
> # dmesg
> [... nothing interesting ...]
> 
> Do i anything wrong here? Or maybe a broblem with reiserfs?
> 
> BTW, how stable is qcow considered at the moment? Reading the README
> it seams quite mature to me.
> 
> Greetings,
> -timo
> 
> Timo Benk wrote:
>> Hi,
>>
>> Sorry, small typo ...
>>
>> i try to create a LVM backed qcow image, but it seems qcow does not
>> like LVM.
>>
>> === create qcow image LV ===
>> # lvcreate --name xendom_qcow --size 100G xenvol
>> # mkreiserfs /dev/xenvol/xendom_qcow
>> # mount /dev/xenvol/xendom_qcow /var/lib/xen/images
>>
>> === create base LV and fill with data ===
>> # lvcreate --name xendom_base_qcow --size 10G xenvol
>> # mkreiserfs /dev/xenvol/xendom_base_qcow
>> # mount /dev/xenvol/xendom_base_qcow /mnt
>> # tar cpjf domu-base.tar.bz2 -C /mnt
>>
>> === create file backed qcow image ===
>> # qcow-create 5120 /var/lib/xen/images/xengate_root.qcow
>>   /dev/xenvol/xendom_base_qcow
>> # xm block-attach Domain-0
>>      tap:qcow:/var/lib/xen/images/xengate_root.qcow xvda1 w 0
>> # mount /dev/xvda1 /mnt
>> [... mount is hanging forever ...]
>>
>> # dmesg
>> [...]
>> ReiserFS: xvda1: checking transaction log (xvda1)
>> blk_tap: Can't get UE info
>>
>> ???
>>
>> Greetings,
>> -timo
>>
> 
> 


-- 
Timo Benk - Jabber ID: fry@xxxxxxxxxx - ICQ ID: #241877854
PGP Public Key: http://m28s01.vlinux.de/timo_benk_gpg_key.asc


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