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    SubjectRe: [PATCH 2/3] inotify: do not BUG on idr entries at inotify destruction
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    On Tue, 2009-08-25 at 13:42 +0200, Mikko C. wrote:
    > >> On Mon, 24 Aug 2009, Eric Paris wrote:
    > >>>
    > >>> You suspect correctly. :( I'll fix in my tree before I request a
    > >>> pull....
    >
    > I just got this with -rc7, but it doesn't look related to what I was
    > having before:
    >
    > BUG: Bad page map in process kio_thumbnail pte:ffff88006cc99128
    > pmd:6d3b1067
    > addr:00007f9d4e3a5000 vm_flags:08000070 anon_vma:(null)
    > mapping:ffff88007abe21a0 index:200
    > vma->vm_ops->fault: filemap_fault+0x0/0x460
    > vma->vm_file->f_op->mmap: ext4_file_mmap+0x0/0x80
    > Pid: 28022, comm: kio_thumbnail Not tainted 2.6.31-rc7 #1
    > Call Trace:
    > [<ffffffff810afaf4>] ? print_bad_pte+0x1d4/0x2c0
    > [<ffffffff810afc79>] ? vm_normal_page+0x99/0xa0
    > [<ffffffff810b0c7d>] ? unmap_vmas+0x4cd/0x970
    > [<ffffffff810b6c74>] ? exit_mmap+0x104/0x1d0
    > [<ffffffff81043e0d>] ? mmput+0x4d/0x100
    > [<ffffffff81048d81>] ? exit_mm+0x101/0x150
    > [<ffffffff8104b240>] ? do_exit+0x6c0/0x750
    > [<ffffffff8104b326>] ? do_group_exit+0x56/0xd0
    > [<ffffffff8104b3c2>] ? sys_exit_group+0x22/0x40
    > [<ffffffff8100b7eb>] ? system_call_fastpath+0x16/0x1b
    > Disabling lock debugging due to kernel taint
    >
    > No lockups or anything.

    I can safely say that I have absolutely no idea, but I'm doubting it is
    mine.

    Does everyone who hit the: kernel BUG at fs/notify/notification.c:93!
    have CONFIG_DEBUG_VM=N ? Mikko indicated that his problems seem to
    crop up with CONFIG_DEBUG_VM=N but not when he enabled it. I'll be
    testing again today with it disabled.....

    -Eric




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