Steven, Try these patches... http://patchwork.ozlabs.org/patch/34047/ http://patchwork.ozlabs.org/patch/34113/
Both patches work for my situation, but I went with the second set as a final patch(34113). On Mon, Mar 8, 2010 at 3:32 PM, Steven A. Falco <sfa...@harris.com> wrote: > Steven A. Falco wrote: > > Apologies - previous crash dump was mangled by the > interspersed program output. Here is one showing > just the crash dump. > > Interestingly, the program does produce correct output, > as verified by dd'ing from /dev/mem to a file, then > doing "od" on the result. So in some sense, the error > is spurious. > > Steve > > # ./mm2 > foo 2>&1 > BUG: Bad page map in process mm2 pte:00000452 pmd:0f6c8400 > page:c0396000 flags:00000404 count:1 mapcount:-1 mapping:(null) index:0 > addr:4801f000 vm_flags:400844fb anon_vma:(null) mapping:cea78430 index:0 > vma->vm_ops->fault: 0x0 > vma->vm_file->f_op->mmap: mmap_mem+0x0/0xa4 > Call Trace: > [cf4c5d90] [c0006cf4] show_stack+0x44/0x16c (unreliable) > [cf4c5dd0] [c0067800] print_bad_pte+0x140/0x1cc > [cf4c5e00] [c0068640] unmap_vmas+0x41c/0x594 > [cf4c5e80] [c006c8f0] exit_mmap+0xb8/0x150 > [cf4c5ea0] [c0020948] mmput+0x50/0xe0 > [cf4c5eb0] [c0024504] exit_mm+0xec/0x10c > [cf4c5ee0] [c0025bd0] do_exit+0xc4/0x5d4 > [cf4c5f20] [c0026124] do_group_exit+0x44/0xa4 > [cf4c5f30] [c0026198] sys_exit_group+0x14/0x28 > [cf4c5f40] [c000edcc] ret_from_syscall+0x0/0x3c > Disabling lock debugging due to kernel taint > BUG: Bad page state in process mm2 pfn:00000 > page:c0396000 flags:00000404 count:0 mapcount:-1 mapping:(null) index:0 > Call Trace: > [cf4c5d80] [c0006cf4] show_stack+0x44/0x16c (unreliable) > [cf4c5dc0] [c00585bc] bad_page+0x94/0x12c > [cf4c5de0] [c005d234] put_page+0x4c/0x170 > [cf4c5df0] [c0073e54] free_page_and_swap_cache+0x34/0x8c > [cf4c5e00] [c0068490] unmap_vmas+0x26c/0x594 > [cf4c5e80] [c006c8f0] exit_mmap+0xb8/0x150 > [cf4c5ea0] [c0020948] mmput+0x50/0xe0 > [cf4c5eb0] [c0024504] exit_mm+0xec/0x10c > [cf4c5ee0] [c0025bd0] do_exit+0xc4/0x5d4 > [cf4c5f20] [c0026124] do_group_exit+0x44/0xa4 > [cf4c5f30] [c0026198] sys_exit_group+0x14/0x28 > [cf4c5f40] [c000edcc] ret_from_syscall+0x0/0x3c > # cat foo > 00000000: 7c7f1b78 7c9e2378 7cbd2b78 7cdc3378 > 00000010: 7cfb3b78 480022ad 3c000002 60001032 > 00000020: 7c1b03a6 3c00c000 60002210 7c1a03a6 > 00000030: 4c000064 48000000 00000000 00000000 > # dd count=1 if=/dev/mem of=goo > # od -X goo > 0000000 7c7f1b78 7c9e2378 7cbd2b78 7cdc3378 > 0000020 7cfb3b78 480022ad 3c000002 60001032 > 0000040 7c1b03a6 3c00c000 60002210 7c1a03a6 > 0000060 4c000064 48000000 00000000 00000000 > 0000100 > > > _______________________________________________ > Linuxppc-dev mailing list > Linuxppc-dev@lists.ozlabs.org > https://lists.ozlabs.org/listinfo/linuxppc-dev >
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