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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20071231091145.GA28133@gondor.apana.org.au>
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>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html