On Mon, Aug 07, 2006 at 09:33:52PM -0400, jamal wrote:
>
> Is there a need for a schedule if that happens? i.e assuming that the
> clearing happens because there are no more packets to process.
> OTOH, if the other side sets the QDISC_RUNNING right after the test,
> then qdisc is running will be entered.
CPU0 CPU1
__qdisc_run
netif_queue_stopped
netif_wake_queue
__netif_schedule
test_bit
clear_bit
So you may end up losing that wake event. The QDISC_RUNNING bit was
originally designed to be used under the qdisc lock, so using it
in a different contexts will require new synchronisation mechanisms.
Cheers,
--
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