On Mon, Mar 09, 2009 at 09:06:10AM +0900, Pyun YongHyeon wrote: > On Sun, Mar 08, 2009 at 06:04:35PM +0100, Beat Siegenthaler wrote: > > Pyun YongHyeon wrote: > > > > > > > > I touched fxp(4) to add more hardware assistance so it could cause > > > problems on your box. Please show me dmesg output and > > > "ifconfig fxp0" > > > output. > > > > > > If you doubt checksum offloading or TSO issues, try > > > "ifconfig fxp0 -tso -txcsum -rxcsum". > > > > > And the command above fixed your issue? >
It seems that fxp(4) has a TSO bug. Would you try attached patch? (Make sure to enable TSO to check whether the issue was resolved.)
Index: sys/dev/fxp/if_fxp.c =================================================================== --- sys/dev/fxp/if_fxp.c (revision 190876) +++ sys/dev/fxp/if_fxp.c (working copy) @@ -1485,7 +1485,8 @@ * checksum in the first frame driver should compute it. */ ip->ip_sum = 0; - ip->ip_len = htons(ifp->if_mtu); + ip->ip_len = htons(m->m_pkthdr.tso_segsz + (ip->ip_hl << 2) + + (tcp->th_off << 2)); tcp->th_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, htons(IPPROTO_TCP + (tcp->th_off << 2) + m->m_pkthdr.tso_segsz));
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