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    SubjectRe: smp_call_function_single lockups
    On Thu, Feb 19, 2015 at 01:42:39PM -0200, Rafael David Tinoco wrote:
    > Linus, Peter, Thomas
    >
    > Just a quick feedback, We were able to reproduce the lockup with this
    > proposed patch (3.19 + patch). Unfortunately we had problems with the
    > core file and I have only the stack trace for now but I think we are
    > able to reproduce it again and provide more details (sorry for the
    > delay... after a reboot it took some days for us to reproduce this
    > again).
    >
    > It looks like RIP is still smp_call_function_single.

    So Linus' patch mostly fixes smp_call_function_single_async() which is
    not what you're using.

    It would be very good to see traces of other CPUs; if for some reason
    the target CPU doesn't get around to running your callback, then we'll
    forever wait on it.

    loaded_vmcs_clear() uses smp_call_function_single(.wait = 1), that
    should work as before.


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