From mboxrd@z Thu Jan  1 00:00:00 1970
From: Rusty Russell <rusty@rustcorp.com.au>
Subject: Re: RFC: const_udelay in 018-delay functions patch
Date: Thu, 26 Oct 2006 09:01:02 +1000
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To: Zachary Amsden <zach@vmware.com>
Cc: Chris Wright <chrisw@sous-sol.org>, Virtualization Mailing List <virtualization@lists.osdl.org>
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On Tue, 2006-10-24 at 23:21 -0700, Zachary Amsden wrote:
> Rusty Russell wrote:
> > On Tue, 2006-10-24 at 22:11 -0700, Zachary Amsden wrote:
> >> +#if defined(CONFIG_PARAVIRT) && !defined(USE_REAL_IO)
> >> +#include <asm/paravirt.h>
> >> +#else =

> >>     =

> >
> > USE_REAL_IO? Is this defined anywhere?  Or just future-proofing?
> >   =

> =

> It has to be used for SMP bootstrapping - IPI acceptance requires real =

> time cross-processor delay, even in a VM

No, that's USE_REAL_TIME_DELAY: USE_REAL_IO is not currently defined
anywhere AFAICT.

>  - and also can be added by a =

> top-level define to kernel compiles for driver domains for Xen to give =

> real time device delays.

Makes sense...
Rusty.
-- =

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