XFS dm_crypt BUG?

XFS dm_crypt BUG?

[Torben Viets]

Hello,

I have a problem with the XFS-filesystem, I use the Kernel 2.6.10 and 
2.6.11-rc4 and rc5 everytime the same behavior.

I have a RAID 5(md0) with 3 disks on md0 (chunk-size 128) there is a 
logical volume (/dev/data/mp3-crypt) which is crypted with AES and the 
encrypted version ist under /dev/mapper/mp3, if the filestem on it is 
xfs and then copie some files on it then I get a kernel panic, mostly on 
greater files (>200MB), if I make the same thing with ext3 there is no 
problem. My first thougt was that the problem is that I make a snapshot 
of the device, but if i remove this it won't work anyway.

My sytem is a Pentium4 1800Mhz
512 MB SDRAM

I can't show you the kernel panic message, because I didn't found it in 
the syslog, it is only on the screen,

I'm not sure what infos you need too.

greetings
Torben Viets

Re: XFS dm_crypt BUG?

[Stephen Lord]

Torben Viets wrote:
> Hello,
> 
> I have a problem with the XFS-filesystem, I use the Kernel 2.6.10 and 
> 2.6.11-rc4 and rc5 everytime the same behavior.
> 
> I have a RAID 5(md0) with 3 disks on md0 (chunk-size 128) there is a 
> logical volume (/dev/data/mp3-crypt) which is crypted with AES and the 
> encrypted version ist under /dev/mapper/mp3, if the filestem on it is 
> xfs and then copie some files on it then I get a kernel panic, mostly on 
> greater files (>200MB), if I make the same thing with ext3 there is no 
> problem. My first thougt was that the problem is that I make a snapshot 
> of the device, but if i remove this it won't work anyway.
> 
> My sytem is a Pentium4 1800Mhz
> 512 MB SDRAM
> 
> I can't show you the kernel panic message, because I didn't found it in 
> the syslog, it is only on the screen,
> 
> I'm not sure what infos you need too.
> 
> greetings
> Torben Viets
> 

The complete kernel panic is what is needed to get anywhere with this.

If all else fails, get a digital camera and take a picture of it,
although you may need to reconfigure your console to get enough lines
displayed. A console down a serial line to another computer is the best
way of capturing these though.

Just on a hunch, check if you have 4K stacks turned on, if you do, go
back to 8K stacks and see if that cures it.

Steve

Re: XFS dm_crypt BUG?

[Nathan Scott]

On Sun, Feb 27, 2005 at 01:34:31PM -0600, Stephen Lord wrote:
> Torben Viets wrote:
> > 
> > I have a RAID 5(md0) with 3 disks on md0 (chunk-size 128) there is a 
> > ...
> > I can't show you the kernel panic message, because I didn't found it in 
> > the syslog, it is only on the screen,
> ...
> Just on a hunch, check if you have 4K stacks turned on, if you do, go
> back to 8K stacks and see if that cures it.

Also (if still an option) try mkfs'ing the filesystem with
a sector size matching your blocksize (eg. -ssize=4k), which
will make XFS's IO patterns a little more uniform.  This has
resolved RAID5 driver confusion in the past, so worth a shot.

cheers.

-- 
Nathan

Re: XFS dm_crypt BUG?

[Torben Viets]

Hello,

it works with Kernel 2.6.11, probably the problem was that I had used 4 
kb stacks and now I use the 8kb, but I'm not sure whether this was the 
problem.

greetings
Torben Viets

Nathan Scott schrieb:

>On Sun, Mar 06, 2005 at 09:31:01PM +0100, Torben Viets wrote:
>  
>
>>hello,
>>
>>I tried to reproduced the bug with the newest kernel and but it works 
>>perfectly :D
>>
>>thnk you for fixing it.
>>    
>>
>
>No problem, thanks for checking - could you send a note to the
>list(s) saying its resolved for you with that kernel version, in
>case others have also been seeing the problem.
>
>cheers.
>
>  
>