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[Xen-devel] Re: [PATCH] xen: core dom0 support

To: Ingo Molnar <mingo@xxxxxxx>
Subject: [Xen-devel] Re: [PATCH] xen: core dom0 support
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Sat, 28 Feb 2009 01:46:05 -0800
Cc: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, the arch/x86 maintainers <x86@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>
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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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