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From: John Baldwin <jhb@freebsd.org>
To: Craig Boston <craig@tobuj.gank.org>
Date: Wed, 25 Jan 2006 09:16:57 -0500
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Cc: freebsd-hackers@freebsd.org, Scott Long <scottl@samsco.org>
Subject: Re: Weird PCI interrupt delivery problem (resolution, sort of)
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On Tuesday 24 January 2006 19:34, Craig Boston wrote:
> On Tue, Jan 24, 2006 at 10:43:49AM -0500, John Baldwin wrote:
> > What if you do a read of the lapic before the write?  Maybe doing 'x =
> > lapic->eoi;  lapic->eoi = 0;'?
>
> Reading the lapic before the write has no effect.
>
> Reading the lapic after the write makes it work.

Hmm, perhaps the read forces the write to post?  Scott?

-- 
John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org