hello,all! I have experimented on the ip_conntrack.But I found an interesting thing: I set the hashsize 20, then the ip_conntrack_max should be 160, exactly it's 160 in /proc/sys/net/ipv4/ip_conntrack_max.In the header of function init_conntrack() I printk the ip_conntrack_count. Now, this printing value may great than ip_conntrack_max(160) occasionaly.How can this occur? Who can help me? Thanks! Best regards! Bill.