On Mon, 25 Sep 2006 20:05:59 -0700, "Manoj Ekbote" <manoje@xxxxxxxxxxxx> wrote: > The latest tip still has problems with booting on Broadcom boards. > I turned on a couple of printk's in the page fault handler and I see the > following messages: ... > It looks like a cache corruption issue. Did the removal of > flush_icache_page > cause this? Yes perhaps. But flush_icache_page() itself is obsolete API and should be gone (see Documentation/cachetlb.txt). So there should be fault in somewhere else. I think http://www.linux-mips.org/archives/linux-mips/2006-08/msg00184.html is still needed, but it seems not enough. If reverting flush_icache_page() worked, then you can debug more. 1. kill part of local_sb1_flush_icache_page(). If killing __sb1_writeback_inv_dcache_phys_range() part was OK, then it would be dcache issue, if killing drop_mmu_context() part was OK, then it would be icache issue. 2. kill calls of flush_icache_page(). If is used in only 3 places. mm/fremap.c: flush_icache_page(vma, page); mm/memory.c: flush_icache_page(vma, page); mm/memory.c: flush_icache_page(vma, new_page); Finding which lines are required might help further investigation. Another possible approach might be trying c-r4k.c instead of c-sb1.c. If you wanted to debug with latest git tree, note that include/asm-mips/hazard.h in current lmo git tree seems broken. The fix was already posted to this ML so hopefully we can see in git tree soon... --- Atsushi Nemoto
