Re: [Xen-devel] Re: [Xen-ia64-devel] [PATCH] make MAX_SKBUFF_ORDER page size independent

[Tristan Gingold <Tristan.Gingold@xxxxxxxx>]

Le Mardi 03 Octobre 2006 08:59, Keir Fraser a écrit :
> On 3/10/06 7:43 am, "Tristan Gingold" <Tristan.Gingold@xxxxxxxx> wrote:
> > Le Mardi 03 Octobre 2006 07:06, Isaku Yamahata a écrit :
> >> make MAX_SKBUFF_ORDER page size independent.
> >> Presumably the original value 4 comes from 64KB = (4KB << 4) which is
> >> ip packet maximum size.
> >> However page size is not always 4KB. e.g. IA64 default page size is
> >> 16KB.
> >
> > I suppose it fixes the fedora bug ?
> >
> > I wonder if this patch works when pagesize is 64KB ?  Maybe force 1 as
> > the minimum value ?
>
> We want to move to the copying receive path as default asap by the way, you
> might want to check that it works with ia64 (boot a domU with extra Linux
> cmdline option "xennet.rx_copy" and check you get a boot message saying
> that a net device eth0 has been created with copying receive path).
This option has net yet been merged in xen-ia64-unstable.hg; I will try ASAP.

> Also since our network interfaces now support scatter-gather (thanks to
> Herbert Xu) I expect to get rid of our special skbuff allocators, at least
> for oridnary alloc_skb and dev_alloc_skb calls. This should happen early in
> the 3.0.4 development cycle.
Good news.

Tristan.

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