On Tuesday, 21 March 2000 at 7:46:57 +0100, Poul-Henning Kamp wrote:
> In message <[EMAIL PROTECTED]>, Wes Peters writes:
>> Poul-Henning Kamp wrote:
>>>
>>> In message <[EMAIL PROTECTED]>, Warner Losh writes:
>>>
>>>> I'd like to be able to do some simple spl locking in a driver that I'm
>>>> writing. While I could go the splhigh() route, I'm concerned that
>>>> spending lots of time at splhigh could cause problems, and some of my
>>>> critical sections look to be very expensive. They only need
>>>> protection against the card itself, not against the entire system. It
>>>> just seems to be an overly large hammer.
>>>
>>> I miss this too.
>>
>> Semaphores?
>
> spl*() are semaphores.
spl*() are interrupt lockouts. The difference is very evident in an
SMP environment.
Greg
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