Bug#561203: threads and fork on machine with VIPT-WB cache

["John David Anglin" <dave@hiauly1.hia.nrc.ca>]

> On Thu, 08 Apr 2010, Helge Deller wrote:

> > I tested your patch today on one of my machines with plain kernel 2.6.33 (32bit, SMP, B2000 I think).
> > Sadly I still did see the minifail bug.
> > 
> > Are you sure, that the patch fixed this bug for you?
> 
> Seemed to, but I have a bunch of other changes installed.  Possibly,
> the change to cacheflush.h is important.  It affects all PA8000.

I also think the change suggested by James

+       if (pte_dirty(old_pte))

is important for SMP.  With the patch set that I sent, my rp3440 and
gsyprf11 seem reasonably stable running 2.6.33.2 SMP.  I doubt all
problems are solved but things are a lot better than before.

Dave
-- 
J. David Anglin                                  dave.anglin@nrc-cnrc.gc.ca
National Research Council of Canada              (613) 990-0752 (FAX: 952-6602)