linux-kernel - Re: reiserfs fs/reiserfs/bitmap.c:1287

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Message-ID: <a52a95e30708091118k1aa962d8u214a7f0624df78e3@mail.gmail.com>
Date:	Thu, 9 Aug 2007 11:18:27 -0700
From:	"Tom Mortensen" <tmmlkml@...il.com>
To:	"Jeff Mahoney" <jeffm@...e.com>
Cc:	tony@...rtex.net, linux-kernel@...r.kernel.org,
	"ReiserFS Mailing List" <reiserfs-devel@...r.kernel.org>
Subject: Re: reiserfs fs/reiserfs/bitmap.c:1287

Using mkreiserfs version 3.6.19.  But file system is less than 80GB.

On 8/8/07, Jeff Mahoney <jeffm@...e.com> wrote:

> In any event, something is corrupting your bitmaps and that needs to get
> tracked down. The size of the file system is important. I've been seeing
> reports of users hitting similar problems with file systems larger than
> 8 TiB. The cause is that the s_bmap_nr field in the superblock is 16
> bit, and the file system assumes it's correct. mkreiserfs < 3.6.20 will
> happily create those file systems with a value that has wrapped, while
> mkreiserfs >= 3.6.20 will zero the value out, causing a mount failure
> unless the kernel has been patched to support the full size and to
> interpret s_bmap_nr == 0 as "value has overflowed."
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