cvs commit: src/sys/kern kern_switch.c sched_4bsd.c
nate at root.org
Fri Jun 10 01:46:49 GMT 2005
Stephan Uphoff wrote:
> On Thu, 2005-06-09 at 19:25, John Baldwin wrote:
>>On Jun 9, 2005, at 12:43 PM, Stephan Uphoff wrote:
>>>ups 2005-06-09 19:43:08 UTC
>>> FreeBSD src repository
>>> Modified files:
>>> sys/kern kern_switch.c sched_4bsd.c
>>> Lots of whitespace cleanup.
>>> Fix for broken if condition.
>>> Submitted by: nate@
>>What was broken about the if test? The intention was that when
>>FULL_PREEMPTION was off, we only preempt if the destination thread is
>>an ithread or if the current thread is an idle priority thread.
> I was under the impression that we never preempt the idle thread but did
> not investigate closer.
> Is it save to preempt the idle thread on x86 when it does its ACPI
> C-state magic?
I agree that the idle thread should be pre-empted before the Cx sleep.
More information about the cvs-src