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Date:	Thu, 02 Dec 2010 15:14:28 +0100
From:	Spelic <spelic@...ftmail.org>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	xfs@....sgi.com, linux-lvm@...hat.com
Subject: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram

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


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