On Sat, Nov 21, 2009 at 02:41:49AM +0200, Julian Anastasov wrote: > > Hello, > > On Fri, 20 Nov 2009, Aleksey Chudov wrote: > > > Hello! > > > > I have HP ProLiant BL460c G6 servers with Broadcom Corporation NetXtreme II > > BCM57711E 10-Gigabit PCIe controller. After enabling Virtual Server in > > kernel and placing server to the test environment with just 10Mbit/s traffic > > I see a lot of error messages in logs. > > > > I try different kernel versions 2.6.27.39, 2.6.31.2, 2.6.31.6 but every time > > I see the same error: > > > > With 2.6.31.x kernel: > > > > Nov 19 23:35:30 bsrvm8-1 kernel: ------------[ cut here ]------------ > > Nov 19 23:35:30 bsrvm8-1 kernel: WARNING: at net/core/dev.c:1563 > > skb_gso_segment+0x10f/0x260() > > Nov 19 23:35:30 bsrvm8-1 kernel: Hardware name: ProLiant BL460c G6 > > Nov 19 23:35:30 bsrvm8-1 kernel: bnx2x: caps=(0x198829, 0x0) len=719 > > data_len=119 ip_summed=1Pid: 0, comm: swapper Tainted: G W > > caps 0x198829 has 0x8000 (NETIF_F_LRO). It seems LRO is > not disabled for your devices, may be it should happen when > you enable the IP forwarding for the concerned devices. It > seems you didn't enabled IP forwarding. Can you confirm it? > Also, may be LRO can be disabled with ethtool. > > The problem exists because IPVS does not > disable LRO, it must be done under RTNL and IPVS never runs > in this context. And LRO is not supported for forwarding: > > http://marc.info/?l=linux-netdev&m=121389887114416&w=2 > > IPVS does not call ip_forward for DR method, that > is why you do not need forwarding and the LRO warning > does not occur before hitting the GSO code. ip_forward > just drops LRO packets: > > if (skb_warn_if_lro(skb)) > goto drop;
Hi Julian, do you have any thoughts on how the code might be improved to handle this case a bit better? Perhaps something along the lines of the code for LRO in ip_forward? _______________________________________________ Please read the documentation before posting - it's available at: http://www.linuxvirtualserver.org/ LinuxVirtualServer.org mailing list - lvs-users@LinuxVirtualServer.org Send requests to lvs-users-requ...@linuxvirtualserver.org or go to http://lists.graemef.net/mailman/listinfo/lvs-users
