On Thu, 25 Mar 2010 11:29:25 +0800 Américo Wang <xiyou.wangcong@xxxxxxxxx> wrote: > (Cc'ing linux-mm) > Hmm..here is summary of corruption (from log), but no idea. == process's address pte pnf->pte->page 00000037b4008000 2bf1e025 -> PG_reserved 00000037b400a000 d900000000 -> bad swap 00000037b400c000 2bfe8025 -> PG_reserved 00000037b400d000 12bfe9025 -> belongs to some other files' page cache 00000037b400e000 ff00000000 -> bad swap 00000037b400f000 5400000000 -> bad swap ... 00000037b4019000 ff00000000 -> bad swap == All ptes are on the same pmd 1535b5067. . I doubt some kind of buffer overflow bug overwrites page table... Because ptes for adddress of 00000037b4008000...00000037b400f000 are on head of a page (used for pmd), some data on page [0x1535b4000..0x1535b5000) caused buffer overflow and broke page table in [0x1535b5000...0x1535b6000) Is this bug found from 2.6.28.10 ? If I investigate this issue, I'll check the owner of page 0x1535b4000 by crash dump. Thanks, -Kame > 2010/3/25 Janos Haar <janos.haar@xxxxxxxxxxxx>: > > Dear developers, > > > > This is one of my productive servers, wich suddenly starts to freeze (crash) > > some weeks before. > > I have done all what i can, (i think) please somebody give to me some > > suggestion: > > > > Mar 24 19:22:28 alfa kernel: BUG: Bad page map in process httpd pte:2bf1e025 > > pmd:1535b5067 > > Mar 24 19:22:28 alfa kernel: page:ffffea0000f1b250 flags:4000000000000404 > > count:1 mapcount:-1 mapping:(null) index:0 > > Mar 24 19:22:28 alfa kernel: addr:00000037b4008000 vm_flags:08000875 > > anon_vma:(null) mapping:ffff88022b5d25a8 index:8 > > Mar 24 19:22:28 alfa kernel: vma->vm_ops->fault: filemap_fault+0x0/0x34d > > Mar 24 19:22:28 alfa kernel: vma->vm_file->f_op->mmap: > > xfs_file_mmap+0x0/0x33 > > Mar 24 19:22:28 alfa kernel: Pid: 7512, comm: httpd Not tainted 2.6.32.10 #2 > > Mar 24 19:22:28 alfa kernel: Call Trace: > > Mar 24 19:22:28 alfa kernel: [<ffffffff810c2ea3>] print_bad_pte+0x210/0x229 > > Mar 24 19:22:28 alfa kernel: [<ffffffff810c3c98>] unmap_vmas+0x44b/0x787 > > Mar 24 19:22:28 alfa kernel: [<ffffffff810c81d5>] exit_mmap+0xb0/0x133 > > Mar 24 19:22:28 alfa kernel: [<ffffffff81041f83>] mmput+0x48/0xb9 > > Mar 24 19:22:28 alfa kernel: [<ffffffff810463b0>] exit_mm+0x105/0x110 > > Mar 24 19:22:28 alfa kernel: [<ffffffff81371287>] ? > > tty_audit_exit+0x28/0x85 > > Mar 24 19:22:28 alfa kernel: [<ffffffff810477a0>] do_exit+0x1e9/0x6d2 > > Mar 24 19:22:28 alfa kernel: [<ffffffff81053c37>] ? > > __dequeue_signal+0xf1/0x127 > > Mar 24 19:22:28 alfa kernel: [<ffffffff81047d00>] do_group_exit+0x77/0xa1 > > Mar 24 19:22:28 alfa kernel: [<ffffffff810560f7>] > > get_signal_to_deliver+0x32c/0x37f > > Mar 24 19:22:28 alfa kernel: [<ffffffff8100a484>] > > do_notify_resume+0x90/0x740 > > Mar 24 19:22:28 alfa kernel: [<ffffffff8102724b>] ? > > __bad_area_nosemaphore+0x178/0x1a2 > > Mar 24 19:22:28 alfa kernel: [<ffffffff810272b9>] ? __bad_area+0x44/0x4d > > Mar 24 19:22:28 alfa kernel: [<ffffffff8100bba2>] retint_signal+0x46/0x84 > > Mar 24 19:22:28 alfa kernel: Disabling lock debugging due to kernel taint > > Mar 24 19:22:28 alfa kernel: swap_free: Bad swap file entry 6c800000 > > Mar 24 19:22:28 alfa kernel: BUG: Bad page map in process httpd > > pte:d900000000 pmd:1535b5067 > > Mar 24 19:22:28 alfa kernel: addr:00000037b400a000 vm_flags:08000875 > > anon_vma:(null) mapping:ffff88022b5d25a8 index:a > > Mar 24 19:22:28 alfa kernel: vma->vm_ops->fault: filemap_fault+0x0/0x34d > > Mar 24 19:22:28 alfa kernel: vma->vm_file->f_op->mmap: > > xfs_file_mmap+0x0/0x33 > > Mar 24 19:22:28 alfa kernel: Pid: 7512, comm: httpd Tainted: G B > > 2.6.32.10 #2 > > Mar 24 19:22:28 alfa kernel: Call Trace: > > Mar 24 19:22:28 alfa kernel: [<ffffffff81044551>] ? add_taint+0x32/0x3e > > Mar 24 19:22:28 alfa kernel: [<ffffffff810c2ea3>] print_bad_pte+0x210/0x229 > > Mar 24 19:22:28 alfa kernel: [<ffffffff810c3d47>] unmap_vmas+0x4fa/0x787 > > Mar 24 19:22:28 alfa kernel: [<ffffffff810c81d5>] exit_mmap+0xb0/0x133 > > Mar 24 19:22:28 alfa kernel: [<ffffffff81041f83>] mmput+0x48/0xb9 > > Mar 24 19:22:28 alfa kernel: [<ffffffff810463b0>] exit_mm+0x105/0x110 > > Mar 24 19:22:28 alfa kernel: [<ffffffff81371287>] ? > > tty_audit_exit+0x28/0x85 > > Mar 24 19:22:28 alfa kernel: [<ffffffff810477a0>] do_exit+0x1e9/0x6d2 > > Mar 24 19:22:28 alfa kernel: [<ffffffff81053c37>] ? > > __dequeue_signal+0xf1/0x127 > > Mar 24 19:22:28 alfa kernel: [<ffffffff81047d00>] do_group_exit+0x77/0xa1 > > Mar 24 19:22:28 alfa kernel: [<ffffffff810560f7>] > > get_signal_to_deliver+0x32c/0x37f > > Mar 24 19:22:28 alfa kernel: [<ffffffff8100a484>] > > do_notify_resume+0x90/0x740 > > Mar 24 19:22:28 alfa kernel: [<ffffffff8102724b>] ? > > __bad_area_nosemaphore+0x178/0x1a2 > > Mar 24 19:22:28 alfa kernel: [<ffffffff810272b9>] ? __bad_area+0x44/0x4d > > Mar 24 19:22:28 alfa kernel: [<ffffffff8100bba2>] retint_signal+0x46/0x84 > > Mar 24 19:22:28 alfa kernel: BUG: Bad page map in process httpd pte:2bfe8025 > > pmd:1535b5067 > > Mar 24 19:22:28 alfa kernel: page:ffffea0000f1f7c0 flags:4000000000000404 > > count:1 mapcount:-1 mapping:(null) index:0 > > Mar 24 19:22:28 alfa kernel: addr:00000037b400c000 vm_flags:08000875 > > anon_vma:(null) mapping:ffff88022b5d25a8 index:c > > Mar 24 19:22:28 alfa kernel: vma->vm_ops->fault: filemap_fault+0x0/0x34d > > Mar 24 19:22:28 alfa kernel: vma->vm_file->f_op->mmap: > > xfs_file_mmap+0x0/0x33 > > Mar 24 19:22:28 alfa kernel: Pid: 7512, comm: httpd Tainted: G B > > 2.6.32.10 #2 > > Mar 24 19:22:28 alfa kernel: Call Trace: > > Mar 24 19:22:28 alfa kernel: [<ffffffff81044551>] ? add_taint+0x32/0x3e > > Mar 24 19:22:28 alfa kernel: [<ffffffff810c2ea3>] print_bad_pte+0x210/0x229 > > Mar 24 19:22:28 alfa kernel: [<ffffffff810c3c98>] unmap_vmas+0x44b/0x787 > > Mar 24 19:22:28 alfa kernel: [<ffffffff810c81d5>] exit_mmap+0xb0/0x133 > > Mar 24 19:22:28 alfa kernel: [<ffffffff81041f83>] mmput+0x48/0xb9 > > Mar 24 19:22:28 alfa kernel: [<ffffffff810463b0>] exit_mm+0x105/0x110 > > ..... > > > > The entire log is here: > > http://download.netcenter.hu/bughunt/20100324/messages > > > > The actual kernel is 2.6.32.10, but the crash-series started @ 2.6.28.10. > > > > I have forwarded the tasks to another server, removed this from the room, > > and the hw survived memtest86 in >7 days continously + i have tested the > > HDDs one by one with badblocks -vvw, all is good. > > For me looks like this is not a hw problem. > > > > Somebody have any idea? > > > > Thanks a lot, > > Janos Haar > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Please read the FAQ at http://www.tux.org/lkml/ > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . 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