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Re: [Xen-devel] RFC: [0/2] Remove netloop by lazy copying in netback

To: Keir Fraser <keir@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] RFC: [0/2] Remove netloop by lazy copying in netback
From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Date: Tue, 27 Mar 2007 21:11:51 +1000
Cc: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>, Xen Development Mailing List <xen-devel@xxxxxxxxxxxxxxxxxxx>
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On Tue, Mar 27, 2007 at 11:19:10AM +0100, Keir Fraser wrote:
>
> Is this a virtual TLB we're talking about? Xen will already have to
> implicitly shatter the large mappings before updating the real TLB, since
> guest machine memory map is not contiguous at the scale of large pages (even
> if we tried at domain build time, it certainly wouldn't be the case when
> foreign grant mappings are scattered all over the place).

OK, you got me there :)

Of course I'd still like to avoid this if possible since it introduces
another change from Linux.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
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