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    SubjectRe: Interesting interaction between lguest and CFS
    On Mon, Jun 04, 2007 at 08:11:51PM +0200, Ingo Molnar wrote:
    >
    > * Matt Mackall <mpm@selenic.com> wrote:
    >
    > > With 2.6.22-rc3-mm1, I've got a long-running video transcoding going
    > > on. In other windows, I'm compiling, reading email, etc. with no
    > > noticeable problems.
    > >
    > > If I fire up lguest and leave it sitting at a shell prompt for a
    > > couple moments, when I return to type something at the prompt, it can
    > > take 2-3 seconds for my input to echo. Once it starts responding,
    > > typing latency disappears. Suspend the other app and the latency
    > > disappears.
    >
    > btw., does this only happen with lguest, or with other idle shells too?

    Only noticed with lguest.

    > perhaps lguest does something unusual when it idles? Does it fiddle
    > sched_clock() in any way?

    In the host? That'd be weird.

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