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    SubjectRe: [GIT PULL] Core block IO bits for 2.6.39 - early Oops
    On 2011-03-24 20:45, Markus Trippelsdorf wrote:
    > On 2011.03.24 at 20:36 +0100, Jens Axboe wrote:
    >> On 2011-03-24 20:34, Markus Trippelsdorf wrote:
    >>> On 2011.03.24 at 19:58 +0100, Jens Axboe wrote:
    >>>> On 2011-03-24 19:54, Markus Trippelsdorf wrote:
    >>>>> On 2011.03.24 at 19:51 +0100, Jens Axboe wrote:
    >>>>>> On 2011-03-24 19:36, Jens Axboe wrote:
    >>>>>>> On 2011-03-24 19:30, Markus Trippelsdorf wrote:
    >>>>>>>> On 2011.03.24 at 14:43 +0100, Jens Axboe wrote:
    >>>>>>>>>
    >>>>>>>>> This is the main pull request for the block IO layer and friends for
    >>>>>>>>> 2.6.39.
    >>>>>>>>
    >>>>>>>> This merge results in an early oops on my system (amd64, xfs).
    >>>>>>>> See the attached photo.
    >>>>>>>>
    >>>>>>>
    >>>>>>> Auch. Can you ensure that you have CONFIG_DEBUGINFO=y in your .config
    >>>>>>> and then do:
    >>>>>>>
    >>>>>>> $ gdb vmlinux
    >>>>>>> ...
    >>>>>>> l *cfq_insert_request+0x32
    >>>>>>>
    >>>>>>> and send that output?
    >>>>>>
    >>>>>> I took a closer look at the oops, and it most likely looks like q ==
    >>>>>> NULL (offset 0x18 == q->elevator). You left out the Code part, so I
    >>>>>> can't verify that for certain. Which makes very little sense. I take it
    >>>>>> this is 100% reproducible? When you send the gdb output, please also
    >>>>>> attach your .config.
    >>>>>
    >>>>> Yes, it's 100% reproducible here. My .config follows:
    >>>>
    >>>> Can you try this patch and see if it makes a difference?
    >>>
    >>> There's no patch ;-)
    >>
    >> Oh, here it is.
    >>
    > It doesn't help, unfortunately. I still get the same BUG at
    > cfq_insert_request+0x32/0x4d0.

    OK, still a data point. What was the last -git kernel you used?

    --
    Jens Axboe



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