netdev - Re: [PATCH net-next] net: percpu net

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Message-ID: <1286474782.2427.4.camel@edumazet-laptop>
Date:	Thu, 07 Oct 2010 20:06:22 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	David Miller <davem@...emloft.net>, netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next] net: percpu net_device refcount

Le jeudi 07 octobre 2010 à 10:30 -0700, Stephen Hemminger a écrit :

> It makes sense, but what about 256 cores and 1024 Vlans?
> That adds up to 4M of memory which is might be noticeable.
> 
> 

Well, 256 cores and 1024 Vlan -> 1 Mbyte of memory, not 4 ;)

This seems reasonable to me.

Eventually we could use a fallback, if percpu allocation failed -> use a
static field in net_device.



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