Messages in this thread | | | Date | Wed, 18 Apr 2001 18:44:02 -0400 | From | Dennis <> | Subject | Re: SMP in 2.4 |
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At 02:05 PM 04/18/2001, Matti Aarnio wrote: >On Wed, Apr 18, 2001 at 11:08:22AM -0400, Dennis wrote: > > Does 2.4 have something similar to spl levels or does it still require the > > ridiculous MS-DOSish spin-locks to protect every bit of code? > > Lets see -- (besides of MSDOS not having any sort of spinlocks), the > spl() is something out of VAX series of machines, and it really works > by presuming that there is some sort of priority leveling among irq > sources.
I was referring to the infamous CLI/STI combinations that are more analogous to spinlocks than anything you are talking about. spl levels are clean and transparent and have been doing a very nice job in helping to avoid race conditions in real unix systems for quite some time now.
db
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