[linux-lvm] Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram

Thu Dec 2 14:14:28 UTC 2010

On 12/02/2010 03:11 PM, Christoph Hellwig wrote:
> I'm pretty sure you have CONFIG_DEBUG_BLOCK_EXT_DEVT enabled.  This
> option must never be enabled, as it causes block devices to be
> randomly renumered.  Together with the ramdisk driver overloading
> the BLKFLSBUF ioctl to discard all data it guarantees you to get
> data loss like yours.
>    

Nope...

# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set