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    SubjectRe: [BUG] rbtree bug with mmotm 2009-04-14-17-24
    On Wed, Apr 22 2009, Steve Wise wrote:
    >
    >>>
    >>> No there are a few patches applied that are heading upstream, but one
    >>> is in the NFS RDMA server which isn't loaded yet and the rest are in
    >>> iw_cxgb3 (iwarp driver) which also hasn't loaded at the time we
    >>> crash. NOTE: Out of 4 power cycles, one booted up ok, 3 hit the
    >>> crash.
    >>>
    >>>
    >>>
    >>
    >> By the way, this one looks different from the last one I saw. So its
    >> not consistently crashing in the same spot. The one I hit yesterday
    >> (which I don't have the OOPs dump for was in rb_erase().
    >>
    >> Steve.
    >
    > I'll start bisecting to isolate this.

    Don't bother, I see what the bug is now. It's caused by commit
    a36e71f996e25d6213f57951f7ae1874086ec57e and it's due to ->ioprio being
    changed without the prio rb root being adjusted.

    I'll provide a fix shortly.

    --
    Jens Axboe



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