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Re: XFS_DB Problem (Corruption of in-memory data detected.)

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: XFS_DB Problem (Corruption of in-memory data detected.)
From: Jan Derfinak <ja@xxxxxxxxxxxx>
Date: Tue, 10 Feb 2004 23:58:26 +0100 (CET)
Cc: "Smith, Andy P." <smith-andy@xxxxxxx>, linux-xfs@xxxxxxxxxxx
In-reply-to: <20040210224350.A11692@xxxxxxxxxxxxx>
References: <C2586F0871D87141A33EB87FC383B38114D48C@xxxxxxxxxxxxxxxxxxxxx> <20040210193707.A9197@xxxxxxxxxxxxx> <Pine.LNX.4.58.0402102325340.22771@xxxxxxxxxxxxxxxxxx> <20040210224350.A11692@xxxxxxxxxxxxx>
Sender: linux-xfs-bounce@xxxxxxxxxxx
On Tue, 10 Feb 2004, Christoph Hellwig wrote:

Hi.

> > never had problem. I use 2.6 kernel now. What is wrong on read-only
> > access?
> 
> The block device and XFS's metadata use the same pages but they don't
> talk to each other enough, so you can get into cases where a page used
> by XFS is flushed and the blockdevice code scribbles over the page which
> will get you inmemory corruption. 
> 

Thanks.
I suggest to notice this in xfs_db man page. From description of '-r' option
isn't clear that it is dangerous.

                                jan


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