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    SubjectRe: [RFC PATCH 0/6] Convert all tasklets to workqueues
    On Mon, 2007-06-25 at 18:00 -0600, Jonathan Corbet wrote:
    > A couple of days ago I said:
    > > The cafe_ccic (OLPC) camera driver uses a tasklet to move frames out of
    > > the DMA buffers in the streaming I/O path....
    > >
    > > Obviously some testing is called for here. I will make an attempt to do
    > > that testing
    > I've done that testing - I have an OLPC B3 unit running V2 of the
    > tasklet->workqueue patch, and all seems well. 30 FPS to the display and
    > no dropped frames. The tasklets/0 process is running 3-5% CPU, in case
    > that's interesting. For whatever reason, I see about 3% *more* idle
    > time when running just mplayer than I did without the patch.
    > Consider my minor qualms withdrawn, there doesn't seem to be any trouble
    > in this area.

    Jon, thanks a lot!

    This is great news. I wonder if converting tasklets to work queues also
    helps with other softirqs. Before, softirqs could not preempt a
    tasklet, since tasklets run as a softirq. With tasklets as work queues,
    what's left as a softirq can now preempt tasklets. Perhaps this can even
    help with performance.

    -- Steve

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