It kind of surprised me that sending 254 arp packets by using the arp-scan tool (http://www.nta-monitor.com/tools/arp-scan/) on a /24 consistently triggers a burst of "eth0: excessive work at interrupt."
This is a 600 MHz PIII, 2.6.22-rc4, via-velocity driver. model name : Pentium III (Katmai) stepping : 3 cpu MHz : 601.406 cache size : 512 KB 00:09.0 Ethernet controller [0200]: VIA Technologies, Inc. VT6120/VT6121/VT6122 Gigabit Ethernet Adapter [1106:3119] (rev 11) Just double-checking... the program actually sent 463 packets (256 + a retry to all those that didn't respond to the first one), and triggers 11 copies of the kernel message. Command line: arp-scan -I eth0 -l [-v] - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html