linux-kernel - Re: [PATCH RFC/RFB] x86_64, i386: interrupt dispatch changes

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Message-ID: <20081104165548.GA696@elte.hu>
Date:	Tue, 4 Nov 2008 17:55:48 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Alexander van Heukelum <heukelum@...tmail.fm>
Cc:	Cyrill Gorcunov <gorcunov@...il.com>,
	Alexander van Heukelum <heukelum@...lshack.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, lguest@...abs.org,
	jeremy@...source.com, Steven Rostedt <srostedt@...hat.com>,
	Mike Travis <travis@....com>
Subject: Re: [PATCH RFC/RFB] x86_64, i386: interrupt dispatch changes


* Ingo Molnar <mingo@...e.hu> wrote:

> * Alexander van Heukelum <heukelum@...tmail.fm> wrote:
> 
> > > My estimation is that if we do it right, your approach will behave 
> > > better on modern CPUs (which is what matters most for such 
> > > things), especially on real workloads where there's a considerable 
> > > instruction-cache pressure. But it should be measured in any case.
> > 
> > Fully agreed. I will do some measurements in the near future, maybe 
> > next week. At least noone came up with an absolutely blocking 
> > problem with this approach ;).
> 
> how about "it does not build with lguest enabled" as a blocking 
> problem? ;-)
> 
>   arch/x86/lguest/built-in.o: In function `lguest_init_IRQ':
>   boot.c:(.init.text+0x33f): undefined reference to `interrupt'
> 
> config attached.

... other than that it booted fine on a few testboxes here. That's 
still not an exhaustive test by any means, but it's promising.

	Ingo
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