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    SubjectRe: [PATCH 2/5] vmevent: Convert from deferred timer to deferred work
    On Fri, Jun 8, 2012 at 9:58 AM, Anton Vorontsov
    <> wrote:
    > If you're saying that we should set up a timer in the userland and
    > constantly read /proc/vmstat, then we will cause CPU wake up
    > every 100ms, which is not acceptable. Well, we can try to introduce
    > deferrable timers for the userspace. But then it would still add
    > a lot more overhead for our task, as this solution adds other two
    > context switches to read and parse /proc/vmstat. I guess this is
    > not a show-stopper though, so we can discuss this.
    > Leonid, Pekka, what do you think about the idea?

    That's exactly the kind of half-assed ABI that lead to people
    inventing out-of-tree lowmem notifiers in the first place.

    I'd be more interested to know what people think of Minchan's that
    gets rid of vmstat sampling.

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      Last update: 2012-06-08 09:41    [W:0.024 / U:35.048 seconds]
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