Hello! I got plenty of replies. Thanks. Playing with /proc/sys/net/ipv4/neigh/default/gc_thresh{2,3} helped. The funny thing is that there are no more ENOBUFS problems - I am guessing that in 2.2.19 buffer of TCP is bigger than in 2.4.x, or something... People asked me about more details of oopses I had with 2.4.5. Sorry I don't have any data that could help and I won't try 2.4.x again, until 2.4.20 comes out :) Andi Kleen said that my problems with 2.4.x and ENOBUFS should be fixed after changing some things in /proc/sys/net/ipv4/tcp_mem, net/core/[rw]mem_{max,default}. Thank you once again :) -- Michal Margula, [EMAIL PROTECTED], ICQ UIN 12267440, +) http://uznam.net.pl/~alchemyx/, Polish section of Linux Counter maintainer - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/