Re: [Kiobuf-io-devel] RFC: Kernel mechanism: Compound event wait /notify + callback chains

Stephen C. Tweedie
2001-01-31T23:35:32Z

Hi,

On Wed, Jan 31, 2001 at 07:28:01PM +0530, bsuparna@in.ibm.com wrote:
>
> Do the following modifications to your wait queue extension sound
> reasonable ?
>
> 1. Change add_wait_queue to add elements to the end of queue (fifo, by
> default) and instead have an add_wait_queue_lifo() routine that adds to the
> head of the queue ?

Cache efficiency: you wake up the task whose data set is most likely
to be in L1 cache by waking it before its triggering event is flushed
from cache.

--Stephen