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

[Keir Fraser <keir@xxxxxxxxxxxxx>]

On 20/3/07 10:22, "Keir Fraser" <keir@xxxxxxxxxxxxx> wrote:

> One other thought I had -- does the Linux network stack ever modify date
> residing outside the main skbuff data area (i.e., data in fragments)? If it
> ever does, wouldn't your delayed copy in netback potentially race such
> updates? If the Linux network stack guarantees never to do such a thing,
> that would be nice for us. :-)

Scrub that question: we already map the grants read-only, so the network
stack can't be trying to write to fragments.

 -- Keir


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