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    SubjectRe: [GIT PULL] Core block IO bits for 2.6.39 - early Oops
    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.

    --
    Markus


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