Rex Feany <rfe...@mrv.com> wrote on 06/10/2009 00:04:20: > > Thus spake Joakim Tjernlund (joakim.tjernl...@transmode.se): > > > Scott and Rex, please disregard other patches from me and > > try these out instead. > > I have results similar to Scott's. I tried both with and without patch > 5 & 6, and I also need the tlbia_va in ptep_set_access_flags(). > > I got this oops: > > Unable to handle kernel paging request for data at address 0x00000000 > Faulting instruction address: 0xc000e110 > Oops: Kernel access of bad area, sig: 11 [#1] > MRV NM2 > NIP: c000e110 LR: c000d520 CTR: 1006bf40 > REGS: c2203dd0 TRAP: 0300 Not tainted (2.6.32-rc3-00014-gcea49b0-dirty) > MSR: 00009032 <EE,ME,IR,DR> CR: 44022422 XER: 20000000 > DAR: 00000000, DSISR: c0000000 > TASK = c21c18c0[69] 'rc.sysinit' THREAD: c2202000 > GPR00: 00000401 c2203e80 c21c18c0 c2203f50 00000000 4000d032 00000000 00000000 > GPR08: 10093eb4 00000000 00009032 c000d514 021c1ad0 10095c50 03ffb000 10006500 > GPR16: 10006508 00000000 00000000 00000000 100a2fc8 021c4238 00000000 00000400 > GPR24: c21a2700 00000002 40000000 00000000 00000000 c2203f50 00000000 00000011 > NIP [c000e110] do_page_fault+0x44/0x5fc > LR [c000d520] handle_page_fault+0xc/0x80 > Call Trace: > [c2203e80] [c000e58c] do_page_fault+0x4c0/0x5fc (unreliable) > [c2203f40] [c000d520] handle_page_fault+0xc/0x80 > Instruction dump: > 800300a0 7cba2b78 54170036 2f970400 7c9c2378 830200e0 54b6018c 40be000c > 74ba4820 3ac00000 813d0080 3bc00000 <80a90000> 54a036be 2f80001f 40be0100 > ---[ end trace 99a4d88f7e2f1b60 ]--- > > this happens in do_page_fault becaose regs->nip is null, so
regs or regs->nip is NULL? Either one does not make sense In any case it might be a secondary problem as DAR is NULL already when you enter the page fault. > > insn = *((unsigned long *)regs->nip); > c000e110: 80 a9 00 00 lwz r5,0(r9) > > fails. hmm, I wonder if you managed to invalidate the a kernel TLB? Are you using pinned kernel TLBs? Jocke _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
