linux-kernel - Re: XFS Fails Quality Assurance Tests on ARM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 28 Sep 2007 07:40:48 +1000
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	David Miller <davem@...emloft.net>, byron.bbradley@...il.com,
	linux-kernel@...r.kernel.org
Subject: Re: XFS Fails Quality Assurance Tests on ARM

On Sunday 02 September 2007 08:14, Andi Kleen wrote:
> David Miller <davem@...emloft.net> writes:
> > From: Byron Bradley <byron.bbradley@...il.com>
> > Date: Fri, 31 Aug 2007 03:12:46 +0000 (UTC)
> >
> > > Anybody got any ideas of how we fix this?
> >
> > I don't know how much testing XFS gets on ARM, but one thing that some
> > ARM chips have is D-cache aliasing problems and one thing XFS uses a
> > lot is virtual remapping of various data structures via vmap().
> >
> > This might be what is causing the problems.
>
> AFAIK XFS uses vmap() mainly during log replay. If David's theory
> was true then the failures must be seen during tests that do
> this.

I think it can also do vmap for directory lookups, and it crashed
in some directory lookup AFAIKS.

One way to verify would be to create the XFS filesystem with PAGE_SIZE
directory blocks (mkfs.xfs -nsize=PAGE_SIZE) I believe. Dave will correct
me if I'm wrong.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/