how are callouts handled in cpu_idle() ?

Adrian Chadd adrian at
Sat Oct 1 05:44:57 UTC 2011


What happens if this occurs:

* cpu_idle() is entered
* you enter critical_enter() and call cpu_idleclock()
* an interrupt occurs, scheduling an immediate callout
* .. but you've already set the clock register, so it won't be
serviced until the wait returns.

Perhaps interrupts have to be disabled before critical_enter() and
cpu_idletick() to ensure an interrupt-driven callout doesn't get


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