Re: When LVM-0.9.1beta7 will be merged to XFS cvs tree?

[Andi Kleen <ak@xxxxxxx>]

On Thu, Jul 05, 2001 at 11:41:37PM +0200, Ragnar Kjørstad wrote:
> On Thu, Jul 05, 2001 at 10:17:47AM +0200, Andi Kleen wrote:
> > All block devices in a XFS kernel need a special patch to add an ioctl
> > to set the logical block size. The original poster probably didn't add
> > that ioctl to his new hacked in LVM; which will cause all kinds of 
> > problems with xfs user tools and also probably file system corruption.
> 
> Is there a patch to add this ioctl to lvm?

Yes, just diff the XFS tree against a Linus tree.

> 
> Exactly what filesystem corruption will it cause, and under what
> circumstances?

fsck can corrupt the file system.
 
> If this is serious, maybe mkfs.xfs should refuse to build a filesystem
> on a device that doesn't support the ioctl?

Doesn't help, it depends on the running kernel which is a variable.
fsck should probably refuse to run, but it currently doesn't I think.


-Andi