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If my DSL connection goes down because of a problem at the provider, /var/log/messages is spammed with lot of kernel trace (always the same message, about 1 MB per minute): Jun 25 14:04:18 han kernel: [ 7344.270897] ------------[ cut here ]------------ Jun 25 14:04:18 han kernel: [ 7344.270902] WARNING: at net/sched/sch_hfsc.c:1429 hfsc_dequeue+0x176/0x2b9 [sch_hfsc]() Jun 25 14:04:18 han kernel: [ 7344.270904] Hardware name: A780GM-A Jun 25 14:04:18 han kernel: [ 7344.270906] Modules linked in: powernow_k8 mperf cpufreq_stats cpufreq_powersave cpufreq_ondemand cpufreq_conservative xt_length xt_mark cls_fw sch_sfq sch_hfsc iptable_mangle ppp_synctty ppp_async crc_ccitt ppp_generic slhc nf_nat_irc nf_conntrack_irc nf_nat_ftp nf_conntrack_ftp ipt_MASQUERADE ipt_REDIRECT iptable_nat nf_nat ipt_LOG xt_limit xt_multiport it87 hwmon_vid usblp isl6421 cx24123 rc_hauppauge ir_lirc_codec lirc_dev ir_sony_decoder ir_jvc_decoder ir_rc6_decoder ir_rc5_decoder ir_nec_decoder rc_core joydev sp5100_tco serio_raw k8temp atl1 via_rhine i2c_piix4 mii i2c_dev ipv6 ata_generic pata_acpi pata_atiixp radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core [last unloaded: videobuf_core] Jun 25 14:04:18 han kernel: [ 7344.270941] Pid: 10, comm: ksoftirqd/1 Tainted: G W 2.6.38.8-32.fc15.i686.PAE #1 Jun 25 14:04:18 han kernel: [ 7344.270943] Call Trace: Jun 25 14:04:18 han kernel: [ 7344.270946] [<c07e17f3>] ? printk+0x2d/0x2f Jun 25 14:04:18 han kernel: [ 7344.270949] [<c04420cd>] warn_slowpath_common+0x7c/0x91 Jun 25 14:04:18 han kernel: [ 7344.270954] [<f9970a4a>] ? hfsc_dequeue+0x176/0x2b9 [sch_hfsc] Jun 25 14:04:18 han kernel: [ 7344.270959] [<f9970a4a>] ? hfsc_dequeue+0x176/0x2b9 [sch_hfsc] Jun 25 14:04:18 han kernel: [ 7344.270962] [<c0442104>] warn_slowpath_null+0x22/0x24 Jun 25 14:04:18 han kernel: [ 7344.270967] [<f9970a4a>] hfsc_dequeue+0x176/0x2b9 [sch_hfsc] Jun 25 14:04:18 han kernel: [ 7344.270971] [<c07e91ee>] ? _raw_spin_lock_irq+0x19/0x1b Jun 25 14:04:18 han kernel: [ 7344.270974] [<c076141d>] __qdisc_run+0x74/0xe9 Jun 25 14:04:18 han kernel: [ 7344.270979] [<c074b0a0>] net_tx_action+0xcb/0xf1 Jun 25 14:04:18 han kernel: [ 7344.270983] [<c04473b8>] __do_softirq+0xa9/0x163 Jun 25 14:04:18 han kernel: [ 7344.270987] [<c044730f>] ? __do_softirq+0x0/0x163 Jun 25 14:04:18 han kernel: [ 7344.270989] <IRQ> [<c0446c7b>] ? run_ksoftirqd+0x5a/0xe2 Jun 25 14:04:18 han kernel: [ 7344.270995] [<c0446c21>] ? run_ksoftirqd+0x0/0xe2 Jun 25 14:04:18 han kernel: [ 7344.270999] [<c0458bdc>] ? kthread+0x67/0x6c Jun 25 14:04:18 han kernel: [ 7344.271012] [<c0458b75>] ? kthread+0x0/0x6c Jun 25 14:04:18 han kernel: [ 7344.271016] [<c0409c3e>] ? kernel_thread_helper+0x6/0x10 Jun 25 14:04:18 han kernel: [ 7344.271018] ---[ end trace 80a96fdfdb1d0026 ]--- Jun 25 14:04:18 han kernel: [ 7344.271026] ------------[ cut here ]------------ Jun 25 14:04:18 han kernel: [ 7344.271031] WARNING: at net/sched/sch_hfsc.c:1429 hfsc_dequeue+0x176/0x2b9 [sch_hfsc]() Jun 25 14:04:18 han kernel: [ 7344.271033] Hardware name: A780GM-A Jun 25 14:04:18 han kernel: [ 7344.271035] Modules linked in: powernow_k8 mperf cpufreq_stats cpufreq_powersave cpufreq_ondemand cpufreq_conservative xt_length xt_mark cls_fw sch_sfq sch_hfsc iptable_mangle ppp_synctty ppp_async crc_ccitt ppp_generic slhc nf_nat_irc nf_conntrack_irc nf_nat_ftp nf_conntrack_ftp ipt_MASQUERADE ipt_REDIRECT iptable_nat nf_nat ipt_LOG xt_limit xt_multiport it87 hwmon_vid usblp isl6421 cx24123 rc_hauppauge ir_lirc_codec lirc_dev ir_sony_decoder ir_jvc_decoder ir_rc6_decoder ir_rc5_decoder ir_nec_decoder rc_core joydev sp5100_tco serio_raw k8temp atl1 via_rhine i2c_piix4 mii i2c_dev ipv6 ata_generic pata_acpi pata_atiixp radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core [last unloaded: videobuf_core] Jun 25 14:04:18 han kernel: [ 7344.271070] Pid: 10, comm: ksoftirqd/1 Tainted: G W 2.6.38.8-32.fc15.i686.PAE #1 Jun 25 14:04:18 han kernel: [ 7344.271072] Call Trace: Jun 25 14:04:18 han kernel: [ 7344.271076] [<c07e17f3>] ? printk+0x2d/0x2f Jun 25 14:04:18 han kernel: [ 7344.271079] [<c04420cd>] warn_slowpath_common+0x7c/0x91 Jun 25 14:04:18 han kernel: [ 7344.271084] [<f9970a4a>] ? hfsc_dequeue+0x176/0x2b9 [sch_hfsc] Jun 25 14:04:18 han kernel: [ 7344.271088] [<f9970a4a>] ? hfsc_dequeue+0x176/0x2b9 [sch_hfsc] Jun 25 14:04:18 han kernel: [ 7344.271092] [<c0442104>] warn_slowpath_null+0x22/0x24 Jun 25 14:04:18 han kernel: [ 7344.271097] [<f9970a4a>] hfsc_dequeue+0x176/0x2b9 [sch_hfsc] Jun 25 14:04:18 han kernel: [ 7344.271100] [<c07e91ee>] ? _raw_spin_lock_irq+0x19/0x1b Jun 25 14:04:18 han kernel: [ 7344.271104] [<c076141d>] __qdisc_run+0x74/0xe9 Jun 25 14:04:18 han kernel: [ 7344.271109] [<c074b0a0>] net_tx_action+0xcb/0xf1 Jun 25 14:04:18 han kernel: [ 7344.271113] [<c04473b8>] __do_softirq+0xa9/0x163 Jun 25 14:04:18 han kernel: [ 7344.271117] [<c044730f>] ? __do_softirq+0x0/0x163 Jun 25 14:04:18 han kernel: [ 7344.271119] <IRQ> [<c0446c7b>] ? run_ksoftirqd+0x5a/0xe2 Jun 25 14:04:18 han kernel: [ 7344.271125] [<c0446c21>] ? run_ksoftirqd+0x0/0xe2 Jun 25 14:04:18 han kernel: [ 7344.271128] [<c0458bdc>] ? kthread+0x67/0x6c Jun 25 14:04:18 han kernel: [ 7344.271131] [<c0458b75>] ? kthread+0x0/0x6c Jun 25 14:04:18 han kernel: [ 7344.271135] [<c0409c3e>] ? kernel_thread_helper+0x6/0x10 Jun 25 14:04:18 han kernel: [ 7344.271138] ---[ end trace 80a96fdfdb1d0027 ]--- And so on. This has filled my small system ssd completly over night. I connect with pppd to my provider. On the ppp device is hfsc used for QOS.
Sorry, I forgot: Kernel version is 2.6.38.8-32.fc15.i686.PAE
Solved with kernel from Update (2.6.40-4.fc15.i686.PAE)