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Re: [Xen-devel] RFC: [0/2] Remove netloop by lazy copying in netback
| To: | Keir Fraser <keir@xxxxxxxxxxxxx>, Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>, Xen Development Mailing List <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] RFC: [0/2] Remove netloop by lazy copying in netback |
| From: | Keir Fraser <keir@xxxxxxxxxxxxx> |
| Date: | Tue, 20 Mar 2007 10:27:48 +0000 |
| Delivery-date: | Tue, 20 Mar 2007 03:26:57 -0700 |
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| In-reply-to: | <C2256659.BD9D%keir@xxxxxxxxxxxxx> |
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| Thread-index: | Acdq2aJ+4UeWBdbMEduzOgAX8io7RQAAMVLU |
| Thread-topic: | [Xen-devel] RFC: [0/2] Remove netloop by lazy copying in netback |
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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 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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