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    SubjectRe: [PATCH v3 0/6] hid: Introduce device groups
    On Mon, 30 Apr 2012, Jiri Kosina wrote:

    > > Here is the third version of the extension to the device-driver
    > > matching mechanism. AFAICT, there are no outstanding issues. I think
    > > we are getting close. :-)
    >
    > I think so, and overall I like the aproach and the implementation. Thanks!
    >
    > Just got the stacktrace on [1] though when running kernel with this
    > patchset. The trace popped during shutdown, and the machine froze
    > completely; I didn't have any kind of external console connected, so
    > unfortunately I don't have the beginning of the whole thing.
    >
    > I haven't been able to reproduce it so far. This was after several
    > "parallel" plug/remove cycles of multiple HID devices driven by multiple
    > different drivers.
    >
    > I haven't performed any analysis what this might be yet.
    >
    > [1] http://www.jikos.cz/jikos/junk/autoloading-trace.jpg

    It actually seems to be spinlock lockup (due to the NMI trigger being
    apparent at the very first line) on kbd_event_lock ...

    --
    Jiri Kosina
    SUSE Labs


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