splxxx replacements?

[Gary Thorpe]

Matthew Dillon wrote:
:That's basically the equivalent of splhigh() and splx(): isn't that 
:worse than blocking individual levels?

    No, not really.   We lose a little handling devices without DMA, but
    that's basically just serial ports and it isn't worth the aggravation of
    trying to manage per-interrupt masking.  The per-interrupt (spl) masking
    also doesn't work well in a SMP environment anyway.
					-Matt
					Matthew Dillon 
					<dillon at xxxxxxxxxxxxx>
Thanks for some explanation. However, it seems the crit_enter/exit only 
works on one CPU in an SMP environment too (looking back at previous 
posting in thread). Is there really a practical as well as conceptual 
difference?