In <[EMAIL PROTECTED]>, on
10/25/2007
at 08:19 PM, Johnny Luo <[EMAIL PROTECTED]> said:
>This leads me to reconsider my understanding about the process of getting
>a spin lock. I used to think what SETLOCK does is just keeping on check
>the lockword and running disabled. Then, what is the difference between a
>spin loop and a disabled loop?
A spin loop is a loop while attempting to acquire a spin lock. A disabled
loop is a loop while running disabled.
>I have another question about RB queue/chain.
You have the direction reversed. RCBRBP points to the first (most recent)
RB on the chain.
>Here is a RB chain after a new RB is added:
>TCB <-- RB1 <-- RB2 <-- RB3
Try (where RB3 is the newest):
TCB --> RB3 --> RB2 --> RB1
>Then this TCB is dispatched and the RB pointed by TCBRBP will be
>executed. Which one?
The newest.
--
Shmuel (Seymour J.) Metz, SysProg and JOAT
ISO position; see <http://patriot.net/~shmuel/resume/brief.html>
We don't care. We don't have to care, we're Congress.
(S877: The Shut up and Eat Your spam act of 2003)
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