RE: APIC and Preemptive mode in Linux Kernel 2.6.5-1.315 ?

["Williams Jr, Ernest L." <ernesto ornl gov>]

-----Original Message-----
From: fedora-test-list-bounces redhat com on behalf of Dave Jones
Sent: Tue 4/13/2004 11:38 AM
To: For testers of Fedora Core development releases
Subject: Re: APIC and Preemptive mode in Linux Kernel 2.6.5-1.315 ?
 
On Sun, 2004-04-11 at 23:02, Ernest L. Williams Jr. wrote:
> Hi,
> 
> Are APIC and PREEMPTIVE MODE turned off for the kernel in FC2T2?

Depends. APIC is off in the UP kernels, on in the SMP kernels.
Preempt is off on all.

Why is Preempt off?  
Is there a reference you can point me to; I would like to read about the issues?


> If so, what is the performance impact with APIC off in dual processor
> box?

It's on in SMP.

> I guess a more general question is:
> Where is the reference on what features Fedora turns on in the kernel?

The config/ dir in the kernel srpm's.

	Dave


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