On Tue, 2011-05-03 at 10:42 -0700, Shirley Ma wrote: > Better to prevent this kind of skbs to be used in skb_clone, expand > head > for now. I looked at the code, skb_clone shouldn't have any problem since ubuf callback is only called after the lower device DMA has done. I can modify the zerocopy len to 256 bytes so expand head should be OK as well. So we only need to prevent recycle skb. I also checked the device drivers, only a few device do RX buffers recycle. So there shouldn't be any problem. I will add more comments here to make sure when ZEROCOPY flag is set, the ubuf callback should only be called when last reference to this skb is gone. Thanks Shirley -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
