Lots of messages like: INFO: rcu_preempt detected stalls on CPUs/tasks: {} (detected by 0, t=40387170 jiffies) INFO: Stall ended before state dump start INFO: rcu_preempt detected stalls on CPUs/tasks: {} (detected by 0, t=40567202 jiffies) INFO: Stall ended before state dump start INFO: rcu_preempt detected stalls on CPUs/tasks: {} (detected by 0, t=40747234 jiffies) INFO: Stall ended before state dump start INFO: rcu_preempt detected stalls on CPUs/tasks: {} (detected by 0, t=40927266 jiffies) INFO: Stall ended before state dump start INFO: rcu_preempt detected stalls on CPUs/tasks: {} (detected by 1, t=41107298 jiffies) INFO: Stall ended before state dump start INFO: rcu_preempt detected stalls on CPUs/tasks: {} (detected by 1, t=41287330 jiffies) INFO: Stall ended before state dump start With an occasional: WARNING: at net/mac80211/rx.c:2985 ieee80211_rx+0x8c1/0x940 [mac80211]() Hardware name: Presario CQ57 Notebook PC Modules linked in: ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 iptable_filter ip_tables x_tables bluetooth aoe vboxnetadp(O) vboxnetflt(O) vboxdrv(O) irlan ircomm_tty ircomm irnet ppp_generic slhc irtty_sir sir_dev irda crc_ccitt videodev media v4l2_compat_ioctl32 arc4 fglrx(P) snd_hda_codec_realtek snd_hda_intel brcmsmac(-) snd_hda_codec snd_hwdep mac80211 snd_pcm snd_timer rts_pstor(C) wmi snd brcmutil cfg80211 r8169 sp5100_tco rfkill snd_page_alloc i2c_piix4 rtc_cmos crc8 mii evdev cordic iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi tg3 libphy fuse raid1 md_mod dm_snapshot dm_mirror dm_region_hash dm_log scsi_wait_scan usbhid usb_storage scsi_transport_fc scsi_tgt sr_mod cdrom sg ata_piix sata_nv Pid: 0, comm: swapper/0 Tainted: P WC O 3.2.12-gentoo #2 Call Trace: <IRQ> [<ffffffff810418bb>] ? warn_slowpath_common+0x7b/0xc0 [<ffffffffa024f3e1>] ? ieee80211_rx+0x8c1/0x940 [mac80211] [<ffffffff8109292d>] ? force_qs_rnp+0x11d/0x150 [<ffffffff81057bac>] ? __queue_work+0xdc/0x3c0 [<ffffffffa0234cd1>] ? ieee80211_tasklet_handler+0xc1/0x160 [mac80211] [<ffffffff8104751a>] ? tasklet_action+0x5a/0xc0 [<ffffffff81047b40>] ? __do_softirq+0x90/0x110 [<ffffffff81513bec>] ? call_softirq+0x1c/0x30 [<ffffffff810045ed>] ? do_softirq+0x4d/0x80 [<ffffffff81047ebe>] ? irq_exit+0x9e/0xc0 [<ffffffff8100424c>] ? do_IRQ+0x5c/0xd0 [<ffffffff815116ab>] ? common_interrupt+0x6b/0x6b <EOI> [<ffffffff8131c283>] ? acpi_idle_enter_simple+0xdc/0x114 [<ffffffff8131c27e>] ? acpi_idle_enter_simple+0xd7/0x114 [<ffffffff813d9111>] ? cpuidle_idle_call+0x91/0xe0 [<ffffffff810011f5>] ? cpu_idle+0x75/0xc0 [<ffffffff8173493d>] ? start_kernel+0x345/0x350 ---[ end of trace ef4ca3650cfd26c4 ]--- A lot of network related issues, ranging from hanging during connect to unable to manage IP. The system kept working in an occasion where this was in a dump: ata1.00: configured for UDMA/133 ata1: EH complete EXT4-fs (dm-6): re-mounted. Opts: commit=0 EXT4-fs (dm-10): re-mounted. Opts: commit=0 ipv6_create_tempaddr(): retry temporary address regeneration. ipv6_create_tempaddr(): retry temporary address regeneration. ipv6_create_tempaddr(): retry temporary address regeneration. ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support. No more RCU's but no more IPv6 connections either.IPv4 kept working though. Reproducible: Always Actual Results: sooner or later a hnging system. I get the problem too. It is related to IPv6 on f.e. wireless. Within 30 minutes my system completely hangs when using IPv6 over a wifi connection. Here are some relevant Kernel patches: http://patchwork.ozlabs.org/patch/149020/ This is a known issue on LKML and has been address in 3.3.1+ See: https://bugzilla.kernel.org/show_bug.cgi?id=42780 Some testing has been done in Arch linux: https://bugs.archlinux.org/task/26847 Please add this to applicable kernels.
Please don't CC arches on your own
Running kernel 3.3.3 now, Wireless does work. Just masses of debug statements like ieee80211 phy0: brcms_c_prec_enq_head: No where to go, prec == 4 ieee80211 phy0: brcms_c_prec_enq_head: No where to go, prec == 4 ieee80211 phy0: brcms_c_prec_enq_head: No where to go, prec == 4 ieee80211 phy0: brcms_c_prec_enq_head: No where to go, prec == 4 ieee80211 phy0: brcms_c_prec_enq_head: No where to go, prec == 4 ieee80211 phy0: brcms_c_prec_enq_head: No where to go, prec == 4 ieee80211 phy0: brcms_c_prec_enq_head: No where to go, prec == 4 ieee80211 phy0: brcms_c_prec_enq_head: No where to go, prec == 4 ieee80211 phy0: brcms_c_prec_enq_head: No where to go, prec == 4 ieee80211 phy0: brcms_c_prec_enq_head: No where to go, prec == 4 ieee80211 phy0: brcms_c_prec_enq_head: No where to go, prec == 4 ieee80211 phy0: brcms_c_prec_enq_head: No where to go, prec == 4 ieee80211 phy0: brcms_c_prec_enq_head: No where to go, prec == 4 ieee80211 phy0: brcms_c_prec_enq_head: No where to go, prec == 4 and ieee80211 phy0: wl0: brcms_c_d11hdrs_mac80211: txop exceeded phylen 130/256 dur 1546/1504 ieee80211 phy0: wl0: brcms_c_d11hdrs_mac80211: txop exceeded phylen 130/256 dur 1546/1504 ieee80211 phy0: wl0: brcms_c_d11hdrs_mac80211: txop exceeded phylen 130/256 dur 1546/1504 ieee80211 phy0: wl0: brcms_c_d11hdrs_mac80211: txop exceeded phylen 130/256 dur 1546/1504 ieee80211 phy0: wl0: brcms_c_d11hdrs_mac80211: txop exceeded phylen 130/256 dur 1546/1504 ieee80211 phy0: wl0: brcms_c_d11hdrs_mac80211: txop exceeded phylen 130/256 dur 1546/1504 ieee80211 phy0: wl0: brcms_c_d11hdrs_mac80211: txop exceeded phylen 130/256 dur 1546/1504 ieee80211 phy0: wl0: brcms_c_d11hdrs_mac80211: txop exceeded phylen 130/256 dur 1546/1504 ieee80211 phy0: wl0: brcms_c_d11hdrs_mac80211: txop exceeded phylen 130/256 dur 1546/1504 both sets in irregular bursts.
It appears you are working fine, now. Please reopen if I am misunderstanding.
