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    SubjectRe: [patch 0/6 -rt] powerpc 2.6.20-rt8: fix boot/runtime errors/warnings for PowerPC(ppc64)
    Tsutomu OWA wrote:
    > Hi Ingo,

    > Please consider for inclusion in your rt tree.

    > This series of patches fixes boot and runntime errors/warnings for
    > powerpc (esp. 64 bit). This applies to linux-2.6.20, patch-2.6.20-rt8
    > and previous my patch set;
    > http://ozlabs.org/pipermail/linuxppc-dev/2007-March/032640.html
    > http://lkml.org/lkml/2007/3/6/503

    > Compile and boot tested on celleb (Cell Reference set) for both
    > PREEMPT_RT=y and PREEMPT_NONE=y.

    > CONFIG_MCOUNT, CONFIG_LATENCY_TRACE and other tracing options nor
    > CONFIG_GENERIC_TIME,

    There is PowerPC genTOD patch and it's incorporated into -rt (don't know
    it works for Cell) but it breaks TOD vsyscalls. Several months ago I've posted
    patches removing them for the time being:

    http://ozlabs.org/pipermail/linuxppc-dev/2006-November/027686.html

    and I've heard that this issue is being worked on now by John Stultz.
    Here's also a patch implemeting read_persitent_clock():

    http://www.tglx.de/projects/hrtimers/2.6.18/broken-out/gtod-persistent-clock-support-ppc.patch

    > clockevents etc are not yet ported.

    Note that there *is* PowerPC clockevents driver already (don't know if it
    works for Cell) -- it just never got merged to -rt:

    http://ozlabs.org/pipermail/linuxppc-dev/2006-November/027794.html
    http://ozlabs.org/pipermail/linuxppc-dev/2006-November/027852.html

    > Comments and suggestions are welcome.

    > Thanks in advance.
    > -- owa
    > TOSHIBA, Software Engineering Center.
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