linux-kernel - Re: hardwired VMI crap

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Date:	Thu, 08 Mar 2007 16:22:23 -0800
From:	Daniel Walker <dwalker@...sta.com>
To:	Zachary Amsden <zach@...are.com>
Cc:	Jeremy Fitzhardinge <jeremy@...p.org>, Ingo Molnar <mingo@...e.hu>,
	tglx@...utronix.de, john stultz <johnstul@...ibm.com>,
	akpm@...ux-foundation.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Pratap Subrahmanyam <pratap@...are.com>,
	Rusty Russell <rusty@...tcorp.com.au>, Andi Kleen <ak@...e.de>,
	Daniel Hecht <dhecht@...are.com>,
	Daniel Arai <arai@...are.com>,
	Chris Wright <chrisw@...s-sol.org>,
	Virtualization Mailing List <virtualization@...ts.osdl.org>
Subject: Re: hardwired VMI crap

On Thu, 2007-03-08 at 15:55 -0800, Zachary Amsden wrote:

> 
> We just don't drive the local timer interrupts through the APIC, we make 
> hypercalls to schedule local timer alarms.  Which is something we must 
> do for UP kernels as well, which use the PIT / PIC.  So there is a need 
> for having clockevents code which doesn't program timers through the APIC.

This getting a bit confusing to me .. When your talking about "local
timer interrupts" are you speaking of a periodic interrupt from the
lapic , or the jiffies increment inside the virtual machine?

Daniel

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