net: don't reallocate skb->head unless the current one hasn't the needed extra size or is shared

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skb head being allocated by kmalloc(), it might be larger than what
actually requested because of discrete kmem caches sizes. Before
reallocating a new skb head, check if the current one has the needed
extra size.

Do this check only if skb head is not shared.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Changli Gao 2010-11-29 22:48:46 +00:00 • committed by David S. Miller

parent 289700dbc4

commit ca44ac3861

1 changed files with 23 additions and 11 deletions

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net/core/skbuff.c

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