On Sun, 29 Jan 2006 23:48:23 +0100 Pawe? Staszewski <pstaszewski@xxxxxxxxx> wrote: > With kernel 2.6.13.4 linux bridge with traffic management for 4000users > and 20.4 MB/s(tx)/22.4 MB/s(rx) data load of CPU is max 50% > With kernel 2.6.15.1 the same linux bridge with the same traffic has > 100% CPU load and in top I have ksoftirqd proccess. Nothing jumps out as major changes. Could you get a profile? If you really want to drill down then using git bisect will really help find the offending patch.