Hi Marcelo [SNIP] > The root of the problem are the changes against the 8xx TLB > handlers introduced > during v2.6. What happens is the TLBMiss handlers load the > zeroed pte into > the TLB, causing the TLBError handler to be invoked (thats > two TLB faults per > pagefault), which then jumps to the generic MM code to setup the pte. > > The bug is that the zeroed TLB is not invalidated (the same reason > for the "dcbst" misbehaviour), resulting in infinite TLBError faults. > > Dan, I wonder why we just don't go back to v2.4 behaviour.
This is one reason why it is the way it is: http://ozlabs.org/pipermail/linuxppc-embedded/2005-January/016382.html This details are little fuzzy ATM, but I think the reason for the current impl. was only that it was less intrusive to impl. Jocke
