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    SubjectRe: [PATCH 2/3] stop_machine: simplify
    On Thursday 10 July 2008 10:30:37 Max Krasnyansky wrote:
    > Rusty Russell wrote:
    > > stop_machine creates a kthread which creates kernel threads. We can
    > > create those threads directly and simplify things a little. Some care
    > > must be taken with CPU hotunplug, which has special needs, but that code
    > > seems more robust than it was in the past.
    > >
    > > Signed-off-by: Rusty Russell <>
    > Rusty,
    > You mentioned (in private conversation) that you were going to add some
    > logic that checks whether CPU is running user-space code and not holding
    > any locks to avoid scheduling stop_machine thread on it. Was it supposed
    > to be part of this patch ?
    > Max

    No... I tried it, and it killed my machine. I didn't chase it for the moment,
    but it's on the "experimental" end of my patch queue.

    Will play with it again and report,

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