Re: Netlink MTU

From: Andi Kleen (ak@suse.de)
Date: Wed Jun 21 2000 - 06:58:02 EST


On Wed, Jun 21, 2000 at 01:56:22PM +0200, Guus Sliepen wrote:
> On Wed, 21 Jun 2000, Andi Kleen wrote:
>
> > First the define is outdated. It could be PAGE_SIZE-sizeof(atomic_t) now --
> > sk_buff header is stored separately now. The problem is that allocations
> > > PAGE_SIZE tend to be unreliable when the system runs longer and the
> > memory is fragmented. Upto 8K is probably safe, for bigger values it is up
> > to your testing (some people run with 32K nfs blocks, but that is probably
> > not a good idea).
>
> Ah, ofcourse. (*bonk* self) Well I think that's a risk those who want high
> MTUs just have to take :). I'll look if I can alter af_netlink.c in a
> safe way... But still, are there some functions out there that rely on
> netlink using only one page for it's sk?

Very unlikely.

-Andi

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