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    SubjectRe: [PATCH 1/5] Fix soft-lookup in stop machine on secondary cpu bring up
    On 05/09/2012 05:04 PM, Shuah Khan wrote:
    > On Wed, 2012-05-09 at 12:24 +0200, Igor Mammedov wrote:
    >> When bringing up cpuX1, it could stall in start_secondary
    >> before setting cpu_callin_mask for more than 5 sec. That forces
    >> do_boot_cpu() to give up on waiting and go to error return path
    >> printing messages:
    >> pr_err("CPU%d: Stuck ??\n", cpuX1);
    >
    > I am seeing this with the linux-next May 7th build on my laptop HP
    > EliteBook 8440p during boot. Could this problem be not specific to virt
    > envs.? Anybody else seeing it?

    I could only guess that on bare metal SMI or other firmware issue may interfere with AP boot.
    Could you test if this patch-set fixes issue for you?
    And do you see the same problem during suspend/resume (assuming that it's booted without problem)?

    --
    -----
    Igor


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