Jivin Ralf Baechle lays it down ...
> On Wed, Nov 22, 2006 at 12:31:10PM -0800, Trevor Hamm wrote:
> > The source of the problem seems to be with squashfs. When I compare
> > booting a kernel using squashfs to one using cramfs (which always seems to
> > boot successfully on power-up), both are reading the troublesome page from
> > /lib/ld-uClibc.so, and both are calling flush_dcache_page() on this page.
> > But in the case of cramfs, flush_dcache_page() causes an immediate cache
> > flush of that page (mapping_mapped(mapping) in __flush_dcache_page() is
> > returning non-zero), while squashfs just marks the page as dirty and defers
> > the cache flush (mapping_mapped(mapping) is returning zero). I have no
> > idea what causes this difference in behaviour, but right now it appears to
> > be a bug in squashfs rather than the linux-mips kernel.
> There are a few other potencial and real bugs me and Atsushi have found
> in squashfs. Guess there is a reason why it's not yet in the kernel ...
> I'm still waiting for feedback from the squashfs author.
Not sure if it helps much, but we run squashfs (with 7zip patch) on
ARM9, ARM10, SuperH and x86 without problems. I haven't had any issues
with it so far on the au1500 either,
David McCullough, firstname.lastname@example.org, Ph:+61 734352815
Secure Computing - SnapGear http://www.uCdot.org http://www.cyberguard.com