netdev - Re: [PATCH v2 nf-next] netfilter: conntrack: remove the central spinlock

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Date:	Wed, 22 May 2013 13:16:01 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Joe Perches <joe@...ches.com>
Cc:	Pablo Neira Ayuso <pablo@...filter.org>,
	netfilter-devel@...r.kernel.org, netdev <netdev@...r.kernel.org>,
	Tom Herbert <therbert@...gle.com>,
	Patrick McHardy <kaber@...sh.net>
Subject: Re: [PATCH v2 nf-next] netfilter: conntrack: remove the central
 spinlock

On Wed, 2013-05-22 at 12:57 -0700, Joe Perches wrote:

> Ahh, nice.
> 
> It might also be nice to mark it if ever more than a u16
> brace/flock/coven/cluster worth of cpus become feasible
> as it seems int is used almost everywhere else.

It seems Linus hates cpu_t or whatever_t

Thats why we have u16 everywhere to code cpu numbers, and why we use
"unsigned long" for jiffies.

Check include/linux/netdevice.h for numerous examples

So far, I believe linux supports at most 4096 cpus.


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