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From: Rusty Russell <rusty@linuxcare.com.au>
To: Andi Kleen <ak@suse.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: New net features for added performance 
In-Reply-To: Your message of "25 Feb 2001 00:48:35 BST."
             <oupsnl3k5gs.fsf@pigdrop.muc.suse.de> 
Date: Sun, 25 Feb 2001 22:49:39 +1100
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In message <oupsnl3k5gs.fsf@pigdrop.muc.suse.de> you write:
> Jeff Garzik <jgarzik@mandrakesoft.com> writes:
> 
> > Advantages:  A de-allocation immediately followed by a reallocation is
> > eliminated, less L1 cache pollution during interrupt handling. 
> > Potentially less DMA traffic between card and host.
> > 
> > Disadvantages?
> 
> You need a new mechanism to cope with low memory situations because the 
> drivers can tie up quite a bit of memory (in fact you gave up unified
> memory management). 

Also, you still need to "clean" the skb (it can hold device and nfct
references).

Rusty.
--
Premature optmztion is rt of all evl. --DK
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