IPIQ messaging patch #1 for SMP

[Matthew Dillon]

:
:On Sun, Apr 10, 2005 at 12:01:33AM -0700, Matthew Dillon wrote:
:>     * Implement a passive IPI message that does not signal the target cpu
:>       at all.  The target cpu will process the message the next time it
:>       polls the queue (no less often then once a tick).  Adjust the
:>       slab free() code to use this new API when freeing blocks owned by 
:>       a different cpu.  Such messages have huge target latencies (obviously)
:>       but cost virtually nothing on either the originating or target cpus
:>       because no hardware IPI is generated for the message.
:
:How does this affect low memory situations?
:
:Joerg

    It wouldn't have any effect at all. 

					-Matt
					Matthew Dillon 
					<dillon at xxxxxxxxxxxxx>