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Message-ID: <20070410123034.GA11493@2ka.mipt.ru> Date: Tue, 10 Apr 2007 16:30:37 +0400 From: Evgeniy Polyakov <johnpol@....mipt.ru> To: Avi Kivity <avi@...ranet.com> Cc: Rusty Russell <rusty@...tcorp.com.au>, Ingo Molnar <mingo@...e.hu>, kvm-devel@...ts.sourceforge.net, netdev <netdev@...r.kernel.org> Subject: Re: [kvm-devel] QEMU PIC indirection patch for in-kernel APIC work On Tue, Apr 10, 2007 at 03:17:45PM +0300, Avi Kivity (avi@...ranet.com) wrote: > >Check a link please in case we are talking about different ideas: > >http://marc.info/?l=linux-netdev&m=112262743505711&w=2 > > > > > > I don't really understand what you're testing there. in particular, how > can the copying time change so dramatically depending on whether you've > just rebooted or not? I tested page remapping time - i.e. time to replace a page in two different mappings - the same should be performed in host and guest kernels if such design is going to be used for communication. I can only explain after-reboot slow copy with empty caches - arbitrary kernel pages were copied into buffer (not the same data as in posted code). -- Evgeniy Polyakov - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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