Saw this in dmesg too: [ 720.030000] ------------[ cut here ]------------ [ 720.030000] WARNING: at /build/cero2/src/Cerowrt-next/build_dir/target-mips_r2_uClibc-0.9.33.2/linux-ar71xx_generic/compat-wireless-2013-01-07/net/mac80211/chan.c:162 __ieee80211_vif_release_channel+0x1d0/0x254 [mac80211]() [ 720.050000] Modules linked in: sch_teql sch_tbf sch_sfq sch_red sch_qfq sch_prio sch_ns2_codel sch_nfq_codel sch_netem sch_htb sch_gred sch_efq_codel sch_dsmark em_text em_nbyte em_meta em_cmp cls_basic act_police act_ipt act_connmark act_skbedit act_mirred em_u32 cls_u32 cls_tcindex cls_flow cls_route cls_fw sch_hfsc sch_fq_codel sch_codel sch_ingress usb_storage ath79_wdt ohci_hcd xt_hashlimit xt_set(O) ip_set_list_set(O) ip_set_hash_netport(O) ip_set_hash_netiface(O) ip_set_hash_net(O) ip_set_hash_ipportnet(O) ip_set_hash_ipportip(O) ip_set_hash_ipport(O) ip_set_hash_ip(O) ip_set_bitmap_port(O) ip_set_bitmap_ipmac(O) ip_set_bitmap_ip(O) ip_set(O) ip6t_REJECT ip6t_rt ip6t_hbh ip6t_mh ip6t_ipv6header ip6t_frag ip6t_eui64 ip6t_ah ip6table_raw ip6table_mangle ip6table_filter ip6_tables nf_conntrack_ipv6 nf_defrag_ipv6 nfnetlink nf_nat_irc nf_nat_ftp nf_conntrack_irc nf_conntrack_ftp xt_policy xt_esp ipt_ah xt_HL xt_hl xt_ecn ipt_ECN xt_CLASSIFY xt_time xt_tcpmss xt_statistic xt_mark xt_length xt_DSCP xt_dscp xt_string xt_layer7 xt_quota xt_pkttype xt_physdev xt_owner xt_addrtype ipt_MASQUERADE iptable_nat xt_nat nf_nat_ipv4 nf_nat xt_recent xt_helper xt_connmark xt_connbytes pptp pppoe xt_conntrack xt_CT iptable_raw xt_state nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack ehci_hcd sd_mod pppox ipt_REJECT xt_TCPMSS xt_LOG xt_comment xt_multiport xt_mac xt_limit iptable_mangle iptable_filter ip_tables xt_tcpudp x_tables ip_gre gre ifb sit ipcomp xfrm4_tunnel xfrm4_mode_tunnel xfrm4_mode_transport xfrm4_mode_beet esp4 ah4 tunnel4 tun tcp_ledbat(O) ppp_async ppp_generic slhc af_key xfrm_user xfrm_ipcomp xfrm_algo vfat fat ext4 jbd2 mbcache autofs4 button_hotplug(O) ath9k(O) ath9k_common(O) ath9k_hw(O) ath(O) nls_utf8 nls_iso8859_2 nls_iso8859_15 nls_iso8859_13 nls_iso8859_1 nls_cp437 mac80211(O) usbcore usb_common scsi_mod nls_base ts_fsm ts_bm ts_kmp crc16 crc_ccitt ipv6 input_polldev cfg80211(O) compat(O) input_core sha1_generic md5 hmac des_generic deflate cbc authenc arc4 zlib_inflate zlib_deflate ledtrig_timer ledtrig_default_on leds_gpio gpio_button_hotplug(O) [ 720.230000] Call Trace: [ 720.240000] [<802a31c4>] dump_stack+0x8/0x34 [ 720.240000] [<80071e34>] warn_slowpath_common+0x78/0xa4 [ 720.250000] [<80071e78>] warn_slowpath_null+0x18/0x24 [ 720.250000] [<86d24f6c>] __ieee80211_vif_release_channel+0x1d0/0x254 [mac80211] [ 720.260000] [<86d253c0>] ieee80211_vif_release_channel+0x4c/0x64 [mac80211] [ 720.270000] [<86d14c8c>] ieee80211_stop_ap+0x194/0x1bc [mac80211] [ 720.270000] [<86c1c50c>] cfg80211_stop_ap+0x78/0xbc [cfg80211] [ 720.280000] [<8022c1ac>] genl_rcv_msg+0x1ec/0x234 [ 720.280000] [<8022b57c>] netlink_rcv_skb+0x6c/0xe4 [ 720.290000] [<8022bfb0>] genl_rcv+0x24/0x34 [ 720.290000] [<8022aeb0>] netlink_unicast+0x164/0x248 [ 720.300000] [<8022b334>] netlink_sendmsg+0x2c4/0x350 [ 720.300000] [<801f7064>] sock_sendmsg+0x80/0xb0 [ 720.310000] [<801f733c>] __sys_sendmsg+0x1a0/0x240 [ 720.310000] [<801f91b8>] sys_sendmsg+0x48/0x7c [ 720.320000] [<8006a064>] stack_done+0x20/0x40 [ 720.320000] [ 720.320000] ---[ end trace 38fe65d6c26f72f3 ]--- Does it look like something new or already seen? On Wed, Jan 16, 2013 at 10:48 PM, Dave Taht wrote: > At least one (possibly not new) unaligned exception trap has reared its > head in addrconf_prefix_rcv. > > https://www.bufferbloat.net/issues/419 > > This is a bad place for one! a network burp heisenbug.... > > On Wed, Jan 16, 2013 at 4:12 PM, Maciej Soltysiak wrote: > >> Good build! I have to report that the issue with polipo, DNS and TFO that >> I observed with 3.7.1-1 seems resolved. >> Test with and without TFO. >> Ketan, I won't post a bug unless it appears again. >> > > What I saw (Ages ago) was that dns would stop working over time in polipo. > > >> >> Regards. >> Maciej >> On Wed, Jan 16, 2013 at 12:37 PM, Dave Taht wrote: >> >>> It's at: >>> >>> http://snapon.lab.bufferbloat.net/~cero2/cerowrt/wndr/3.7.2-3/ >>> >>> It seems pretty stable but with the ipv6 churn... >>> >>> [insert my std hyperbolic warnings about exposing the release to >>> default gws in front of spouses or young children] >>> >>> features: >>> >>> + dnsmasq 2.66test10 >>> + merge with openwrt head >>> + new unaligned access code from openwrt head (by nbd) and the >>> remainder of the older unaligned patch set (by robert bradley) ported >>> to work on top of that >>> >>> I have not checked to see if all traps are gone, you can look at that via >>> files in /sys/debug/kernel/mips/ >>> >>> - it's mostly the ipv6 related traps I'm concerned about... >>> >>> The checksum routine changed and I did check checksums on a variety of >>> ipv4 ethernet traffic, but not enough to feel assured. >>> >>> + Bug fixed https://www.bufferbloat.net/issues/418 >>> >>> BUG_ON removed on TFO support in the kernel. TFO works. I tested it by: >>> >>> echo 3 > /proc/sys/net/ipv4/tcp_fastopen >>> editing /etc/init.d/polipo to add support for a boolean useTCPFastOpen >>> parameter >>> adding that parameter to /etc/config/polipo >>> testing with the current version of httping >>> >>> I will update the init script and config in the next spin. >>> >>> ... >>> >>> The churn in how to setup ipv6 sanely continues. The configuration for >>> how to do it has changed significantly again and is documented at: >>> >>> http://wiki.openwrt.org/doc/uci/network6 >>> >>> It's not clear to me to state of the ipv6 dnsmasq integration now. >>> There is much discussion on the dnsmasq-discuss list as to how to do >>> prefix-independent configuration as one example. >>> >>> as for the ipv6 related changes just now come down from openwrt, >>> steven barth tells me that: >>> >>> "6distributed functionality (prefix delegation) was merged into netifd >>> for size reasons. >>> The shell mess which was ipv6-support was abandoned. >>> >>> dhcpv6 is now a regular network proto in netifd (which can be added >>> ontop of other ipv4-wan types or separately for ipv6-only). >>> >>> network6 is unnecessary now. 6rd, 6to4 now automatically publish their >>> prefix. 6in4 adds a new option ip6prefix for adding the routed prefix. >>> >>> LANs / WLANs which want a prefix now just add a option ip6assign 64 to >>> the interface definition. >>> >>> See examples in: http://wiki.openwrt.org/doc/uci/network6 >>> >>> Prefix Announcement / DHCPv6 / Relaying has been untangled and should >>> be moved into the respective daemon config / init. I've done this for >>> 6relayd. >>> >>> For dnsmasq you will have to add config support similar to what is >>> done for DHCP in IPv4, so it should be easy to adapt. Maybe some of >>> the CeroWrt contributors like to add that. >>> >>> I also haven't looked at NPT yet. I've removed the shell-script mess >>> for now as we will not have all targets up to 3.7 in the coming weeks >>> and therefore also not a new ip6tables." >>> >>> AHCP is still lost and lonely in the configuration. >>> >>> I took a stab at enabling ipv6 NPT support myself in this release, but >>> the changes I'd made to the openwrt configuration didn't successfully >>> get the modules to compile nor create a package. My *non-working >>> patch* looked like this, and suggestions as to what sort of magic wand >>> to wave over it welcomed. >>> >>> diff --git a/include/netfilter.mk b/include/netfilter.mk >>> index 1d89e6d..3d65f76 100644 >>> --- a/include/netfilter.mk >>> +++ b/include/netfilter.mk >>> @@ -154,10 +154,14 @@ $(eval $(call >>> nf_add,IPT_IPV6,CONFIG_IP6_NF_MATCH_RT, $(P_V6)ip6t_rt)) >>> >>> $(eval $(call nf_add,IPT_IPV6,CONFIG_IP6_NF_TARGET_LOG, >>> $(P_V6)ip6t_LOG)) >>> $(eval $(call nf_add,IPT_IPV6,CONFIG_IP6_NF_TARGET_REJECT, >>> $(P_V6)ip6t_REJECT)) >>> +$(eval $(call nf_add,IPT_IPV6,CONFIG_IP6_NF_NAT, $(P_V6)nf_nat_ipv6)) >>> +$(eval $(call nf_add,IPT_IPV6,CONFIG_IP6_NF_TARGET_MASQUERADE, >>> $(P_V6)ip6t_MASQUERADE)) >>> +$(eval $(call nf_add,IPT_IPv6,CONFIG_IP6_NF_TARGET_NPT, >>> $(P_V6)ip6t_NPT)) >>> >>> # nat >>> >>> # kernel only >>> +$(eval $(if $(NF_KMOD),$(call nf_add,IPT_NAT6,CONFIG_IP6_NF_NAT, >>> $(P_V6)nf_nat_ipv6, ge 3.7.0),)) >>> $(eval $(if $(NF_KMOD),$(call nf_add,IPT_NAT,CONFIG_NF_NAT, >>> $(P_XT)nf_nat $(P_V4)nf_nat_ipv4 $(P_XT)xt_nat $(P_V4)iptable_nat, ge >>> 3.7.0),)) >>> $(eval $(if $(NF_KMOD),$(call nf_add,IPT_NAT,CONFIG_NF_NAT, >>> $(P_V4)nf_nat $(P_V4)iptable_nat, lt 3.7.0),)) >>> >>> diff --git a/package/kernel/modules/netfilter.mk >>> b/package/kernel/modules/netfilter.mk >>> index 69bdba0..d862c32 100644 >>> --- a/package/kernel/modules/netfilter.mk >>> +++ b/package/kernel/modules/netfilter.mk >>> @@ -164,6 +164,23 @@ endef >>> >>> $(eval $(call KernelPackage,ipt-nat)) >>> >>> +define KernelPackage/ipt-nat6 >>> + TITLE:=Basic NAT targets for IPv6 >>> + KCONFIG:=$(KCONFIG_IPT_NAT6) >>> + FILES:=$(foreach mod,$(IPT_NAT6-m),$(LINUX_DIR)/net/$(mod).ko) >>> + AUTOLOAD:=$(call AutoLoad,42,$(notdir $(IPT_NAT6-m))) >>> + $(call AddDepends/ipt) >>> +endef >>> + >>> +define KernelPackage/ipt-nat6/description >>> + Netfilter (IPv6) kernel modules for basic NAT targets >>> + Includes: >>> + - MASQUERADE >>> + - NPT >>> +endef >>> + >>> +$(eval $(call KernelPackage,ipt-nat6)) >>> + >>> >>> define KernelPackage/ipt-nat-extra >>> TITLE:=Extra NAT targets >>> >>> >>> -- >>> Dave Täht >>> >>> Fixing bufferbloat with cerowrt: >>> http://www.teklibre.com/cerowrt/subscribe.html >>> _______________________________________________ >>> Cerowrt-devel mailing list >>> Cerowrt-devel@lists.bufferbloat.net >>> https://lists.bufferbloat.net/listinfo/cerowrt-devel >>> >> >> > > > -- > Dave Täht > > Fixing bufferbloat with cerowrt: > http://www.teklibre.com/cerowrt/subscribe.html >