[PATCH 0/6] 8xx MMU fixes

[Joakim Tjernlund]

Rex Feany <RFeany at mrv.com> wrote on 09/10/2009 02:15:27:
>
> Thus spake Joakim Tjernlund (Joakim.Tjernlund at transmode.se):
>
> > So here we go again. This time I am
> > fairly confindent I got most things correct :)
> > Also manged to use even less instructions in the
> > TLB Miss handlers.
> >
> > Scott and Rex, forget previous versions and
> > try this one out.
>
> This patch set is better, userspace seems more stable but I am still
> seeing some odd problems. This is from straceing mount, which displays
> nothing even though /proc/mounts shows everything mounted properly:
>
> open("/proc/mounts", O_RDONLY)          = 3
> fstat64(0x3, 0x7fe7e2a8)                = 0
> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x3001f000
> read(3, 0x3001f000, 1024)               = -1 EFAULT (Bad address)
> exit_group(0)                           = ?
>
> it looks like the memory allocated using mmap is bad?

Try making the tlbil_va in fault.c unconditional, just to make sure
there isn't any old TLBs  around.