Re: BUG 2.6.7 hangs on boot (rx2600)

David Mosberger
2004-07-06T23:45:07Z

>>>>> On Wed, 30 Jun 2004 11:11:04 -0700, Jesse Barnes <jbarnes@engr.sgi.com> said:

>> Looks like there are more places where kernel does "virt -> phys -> virt".
>> And conversion from phys to virt is setting 3 msb to 1.

Jesse> Yep, that looks like a problem. The kernel hangs right after
Jesse> the local_flush_tlb_all in ia64_tlb_init, and if I comment it
Jesse> out I get a "Unable to handle kernel paging request at
Jesse> virtual address a000003004289f70" which, on sn2, looks like a
Jesse> virt -> phys -> virt conversion (i.e. 0x3004289f70 is a valid
Jesse> physical address).

I'm not sure this is related. local_flush_tlb_all() simply flushes
the entire tlb it doesn't touch the "current" pointer in any shape or
fashion. Not doing that flush will leave the kernel with stale TLB
entries, so all bets are off.

--david