linux-kernel - Re: [PATCH] xen: core dom0 support

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Date:	Sat, 28 Feb 2009 01:46:05 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	the arch/x86 maintainers <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Xen-devel <xen-devel@...ts.xensource.com>
Subject: Re: [PATCH] xen: core dom0 support

Ingo Molnar wrote:
> Personally i'd like to see a sufficient reply to the mmap-perf 
> paravirt regressions pointed out by Nick and reproduced by 
> myself as well. (They were in the 4-5% macro-performance range 
> iirc, which is huge.)
>
> So i havent seen any real progress on reducing native kernel 
> overhead with paravirt. Patches were sent but no measurements 
> were done and it seemed to have all fizzled out while the dom0 
> patches are being pursued.
>   

Hm, I'm not sure what you want me to do here.  I sent out patches, they 
got merged, I posted the results of my measurements showing that the 
patches made a substantial improvement.  I'd love to see confirmation 
from others that the patches help them, but I don't think you can say 
I've been unresponsive about this.

    J
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