Hi,
When I was looking into consume_skb() routine (net/core/skbuff.c), there is smp_rmb() read barrier is present.
It is not clear why this is needed here. Basically this routine frees sk_buff if only one user reference is theere
void consume_skb(struct sk_buff * skb)
{
if (unlikely(!skb))
return;
if (likley (atomic_read (&skb->users) == 1))
smp_rmb() --------------------------------------------------------> need for this barrier
......
__kfree_skb();
}
Regards
Kshemendra
_______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
