Le jeudi 26 mai 2011 à 13:24 -0700, Shirley Ma a écrit :

I could reduce callback pointer by moving it to *arg, but not desc, this
indicates that which buffer DMA hasn't done yet in *arg.

I guess you dont need to use skb itself to hold all your states ?

I understand its convenient for you, but I believe its worth the pain to
use only one pointer to a (small) object where you put all your stuff.

Some machines alloc/free millions of skbs per second. 

If/when most skb uses are for userspace zero-copy buffers we can embbed
your small object in skb itself ;)