Lustre discuss - Jun 2006 - LustreError When Creating Loopback Filesystem

Hi,

Lustre is reporting a LustreError (see below) whenever I create a
loopback filesystem on top of Lustre. I am running
1.4.7beta1-patchless for the clients, and 1.4.7beta2 on the OST''s and
MDS.

Here is what I''m doing (Lustre is mounted on /mnt/lustre):

dd if=/dev/zero of=/mnt/lustre/filesystem1 bs=1k count=1572864
mkfs.ext3 -q /mnt/lustre/filesystem1  (error occurs in response to this)

And here is the LustreError generated in response to the mkfs.ext3 command:
<snip>
LustreError: 11682:0:(lov_obd.c:2061:lov_iocontrol()) error: iocontrol
OSC node00001-sharedfs_UUID_2 on OST idx 0 cmd 80041272: err = -25
</snip>

I am able to successfully mount and use the loopback file system
following this. All of the ext3 functionality works fine in the
loopback filesystem.

Is this LustreError something that I should be worried about?

Also, I''m not sure if this is a GCC or Lustre problem: the 1.4.7beta2
MDS kernel panics if Lustre is built with gcc-4.3, however it works
fine if built with gcc-3.4.6

Thanks

On Jun 23, 2006  08:33 -0600, EKC wrote:
> Lustre is reporting a LustreError (see below) whenever I create a
> loopback filesystem on top of Lustre. I am running
> 1.4.7beta1-patchless for the clients, and 1.4.7beta2 on the OST''s
and
> MDS.
> 
> <snip>
> LustreError: 11682:0:(lov_obd.c:2061:lov_iocontrol()) error: iocontrol
> OSC node00001-sharedfs_UUID_2 on OST idx 0 cmd 80041272: err = -25
> </snip>
This is completely harmless.  It is just reporting that your process
did an ioctl on the lustre file that lustre didn''t understand.

Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.

Andreas - fix up this error message _now_ please.

Thanks.

- Peter - 
> -----Original Message-----
> From: lustre-discuss-bounces@clusterfs.com 
> [mailto:lustre-discuss-bounces@clusterfs.com] On Behalf Of 
> Andreas Dilger
> Sent: Friday, June 23, 2006 10:17 AM
> To: EKC
> Cc: lustre-discuss@clusterfs.com
> Subject: Re: [Lustre-discuss] LustreError When Creating 
> Loopback Filesystem
> 
> On Jun 23, 2006  08:33 -0600, EKC wrote:
> > Lustre is reporting a LustreError (see below) whenever I create a 
> > loopback filesystem on top of Lustre. I am running 
> > 1.4.7beta1-patchless for the clients, and 1.4.7beta2 on the 
> OST''s and 
> > MDS.
> > 
> > <snip>
> > LustreError: 11682:0:(lov_obd.c:2061:lov_iocontrol()) 
> error: iocontrol 
> > OSC node00001-sharedfs_UUID_2 on OST idx 0 cmd 80041272: err = -25 
> > </snip>
> 
> This is completely harmless.  It is just reporting that your 
> process did an ioctl on the lustre file that lustre didn''t
understand.
> 
> Cheers, Andreas
> --
> Andreas Dilger
> Principal Software Engineer
> Cluster File Systems, Inc.
> 
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