linux-kernel - Re: 2.6.30-rc5: reiserfs is broken on parisc (bisected)

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Date:	Tue, 12 May 2009 13:20:17 -0400
From:	Jeff Mahoney <jeffm@...e.com>
To:	Alexander Beregalov <a.beregalov@...il.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	linux-parisc@...r.kernel.org, Al Viro <viro@...iv.linux.org.uk>,
	reiserfs-devel@...r.kernel.org
Subject: Re: 2.6.30-rc5: reiserfs is broken on parisc (bisected)

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Alexander Beregalov wrote:
> Hi
> 
> ab17c4f02156c4f75d7fa43a5aa2a7f942d47201 is the first bad commit
> (reiserfs: fixup xattr_root caching)
> 
> Kernel panics when init tries to remount rootfs (reiserfs) with
> read-write access.
> Read-only access works fine.
> 
> No more messages on the screen before panic.
> 
> Is it endianess related?

No, not at all. There was a problem with the xattr code if the kernel
was built with xattrs disabled. It assumed that
REISERFS_SB(s)->xattr_root would be available, which isn't the case when
xattrs aren't enabled. Part of it has been cleaned up in -git1, and I've
sent Al some additional patches to fix the rest of it up.

There's a thread called "reiserfs xattr fixups" that contains 4 patches.
The patch marked with * is the one I believe will fix your problem.

- - reiserfs: cleanup ifdefs
- - reiserfs: deal with NULL xattr root w/ xattrs disabled *
- - reiserfs: fixup perms when xattrs are disabled
- - reiserfs: allow exposing privroot w/ xattrs enabled

- -Jeff

- --
Jeff Mahoney
SUSE Labs
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