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    SubjectRe: [PATCH/RFT 0/2] regression fix: "smpboot: do_boot_cpu failed(-1) to wakeup CPU#1"
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    On Fri, 2015-10-16 at 00:14 -0400, Len Brown wrote:
    > Shane, Donald,
    > Please test this pair of patches.
    >
    > If the default kernel still has a problem booting CPU #1 on your Core2 system,
    > "cpu_init_udelay=10000" should get you back to the legacy delays.

    Applied patches to Linus' 4.3-rc4 (with none of our recently discussed
    changes.)

    Result missing CPU is back!

    I also tried the "cpu_init_udelay=1" with rc5 and that also gave me back
    the missing CPU? Previously I had tried "cpu_init_udelay=10000" and it
    did not get missing CPU back (with rc3 or rc4).

    I can do more testing if you need it.

    Thanks,
    Don





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