linux-kernel - Re: QUESTION: can netdev_alloc_skb() errors be reduced by tuning?

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Message-ID: <20090705034448.GA7588@gondor.apana.org.au>
Date:	Sun, 5 Jul 2009 11:44:48 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	starlight@...nacle.cx, eric.dumazet@...il.com,
	linux-kernel@...r.kernel.org, mel@....ul.ie, linux-mm@...ck.org,
	hugh.dickins@...cali.co.uk, Lee.Schermerhorn@...com,
	kosaki.motohiro@...fujitsu.com, ebmunson@...ibm.com,
	agl@...ibm.com, apw@...onical.com, wli@...ementarian.org,
	netdev@...r.kernel.org
Subject: Re: QUESTION: can netdev_alloc_skb() errors be reduced  by  tuning?

Eric Dumazet <eric.dumazet@...il.com> wrote:
> 
> Because of slab rounding, this reallocation should be done only if resulting data
> portion is really smaller (50 %) than original skb.

If we're going to do this in the core then we should only do it
in the spots where the packet may be held indefinitely.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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