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    SubjectRe: BUG: atomic counter underflow [Was: 2.6.16-rc6-mm1]
    On Sun, 12 Mar 2006, Jiri Slaby wrote:

    Thanks Jiri.

    Certainly looks like a problem for me.

    Puzzling though as this part of the code has been in operation for a long
    long time?

    It would be really helpful if you could give a little more information how
    it happened so I can try and reproduce it?

    > Andrew Morton wrote:
    > >
    > [snip]
    > >+remove-redundant-check-from-autofs4_put_super.patch
    > >+autofs4-follow_link-missing-funtionality.patch

    Maybe it is related to the error in this patch that Andrew pointed out.
    I'm still thinking about how I should deal with that.

    > >
    > > Update autofs4 patches in -mm.
    > Hello,
    > I caught this during ftp browsing autofs-bind-mounted directories. I don't know
    > circumstancies and if the patches above are source of problem. I also don't know
    > if -rc6-mm1 is the first one.
    > BUG: atomic counter underflow at:
    > [<c0104736>] show_trace+0x13/0x15
    > [<c0104873>] dump_stack+0x1e/0x20
    > [<c01d6c97>] autofs4_wait+0x751/0x93a
    > [<c01d543b>] try_to_fill_dentry+0xca/0x11c
    > [<c01d59b3>] autofs4_revalidate+0xe1/0x148
    > [<c0171338>] do_lookup+0x40/0x157
    > [<c0172ec4>] __link_path_walk+0x804/0xe8c
    > [<c017359c>] link_path_walk+0x50/0xe8
    > [<c01738b7>] do_path_lookup+0x10f/0x26d
    > [<c017429c>] __user_walk_fd+0x33/0x50
    > [<c016d226>] vfs_stat_fd+0x1e/0x50
    > [<c016d30d>] vfs_stat+0x20/0x22
    > [<c016d328>] sys_stat64+0x19/0x2d
    > [<c0103127>] syscall_call+0x7/0xb
    > regards,
    > --
    > Jiri Slaby
    > ~\-/~ ~\-/~
    > B67499670407CE62ACC8 22A032CC55C339D47A7E

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