netdev - Re: [RFC/PATCH 0/3] UDP memory usage accounting

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Message-Id: <20070928.215159.58440039.davem@davemloft.net>
Date:	Fri, 28 Sep 2007 21:51:59 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	herbert@...dor.apana.org.au
Cc:	satoshi.oshima.fk@...achi.com, johnpol@....mipt.ru,
	netdev@...r.kernel.org, haoki@...hat.com, yoshfuji@...ux-ipv6.org,
	yumiko.sugita.yf@...achi.com
Subject: Re: [RFC/PATCH 0/3] UDP memory usage accounting

From: David Miller <davem@...emloft.net>
Date: Fri, 28 Sep 2007 21:47:37 -0700 (PDT)

> Per-user limits are not necessarily the answer.

Seeing myself say this reminds me that it seems to have been missed in
all of this that we do have a limit per user already.

There is a per-socket send buffer limit, and there is a per-user open
file descriptor limit.  Multiply the two to determine how much system
memory the user can consume using sockets.

This is why I view a lot ofthis work as quite pointless.  We already
have limits, but nobody wants to use them for performance reasons :-)
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