netdev - Re: [PATCH 1/3] [UDP]: add udp_mem, udp_rmem_min and udp_wmem

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Date:	Mon, 31 Dec 2007 20:11:45 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Eric Dumazet <dada1@...mosbay.com>
Cc:	David Miller <davem@...emloft.net>, haoki@...hat.com,
	netdev@...r.kernel.org, tyasui@...hat.com, mhiramat@...hat.com,
	satoshi.oshima.fk@...achi.com, billfink@...dspring.com,
	andi@...stfloor.org, johnpol@....mipt.ru,
	shemminger@...ux-foundation.org, yoshfuji@...ux-ipv6.org,
	yumiko.sugita.yf@...achi.com
Subject: Re: [PATCH 1/3] [UDP]: add udp_mem, udp_rmem_min and udp_wmem_min

On Mon, Dec 31, 2007 at 09:54:32AM +0100, Eric Dumazet wrote:
>
> Maybe I read the patch incorrectly, or we could add some new sysctl so that
> we not try to uncharge memory if a socket 'forward_alloc' is beyond a given 
> limit (say 2 pages), so that number of atomic_inc/dec on 
> udp_memory_allocated (or tcp_memory_allocated) is reduced.

I don't have time to go through these patches right now but
that was the whole point of using forward_alloc, i.e., avoid
touching the global for every packet.

So if it's still doing that then we're doing something wrong.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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