Re: [PATCH/RESEND] drivers/net/ethernet: dev_alloc_skb tonetdev_alloc_skb

[Eric Dumazet]

Le mardi 24 janvier 2012 Ã 02:11 +0530, Pradeep A. Dalvi a Ãcrit :

> Aah! Is that really needed? Cause from my understanding, priority GFP
> flag __GFP_DMA is anyway negated in __alloc_skb, in a way from all
> sources i.e. netdev_alloc_skb or dev_alloc_skb or even alloc_skb. Am I
> missing something here?

You should read the whole __alloc_skb() function and not only half of
it.

skb itself is allocated in the normal memory pool, (not GFP_DMA), since
it has no hardware requirement for a kernel structure.

But skb->head _is_ allocated with GFP_DMA if driver requested it.



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