Bug 716607

Summary: Lot of Kernel Trace in /var/log/messages when DSL connection goes down
Product: [Fedora] Fedora Reporter: Michael Weidner <micha>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED CURRENTRELEASE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 15CC: aquini, gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda
Target Milestone: ---   
Target Release: ---   
Hardware: i686   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-08-02 17:45:19 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description Michael Weidner 2011-06-25 12:40:46 UTC 
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.
Comment 1 Michael Weidner 2011-06-25 12:44:02 UTC 
Sorry, I forgot:

Kernel version is 2.6.38.8-32.fc15.i686.PAE
Comment 2 Michael Weidner 2011-08-02 17:45:19 UTC 
Solved with kernel from Update (2.6.40-4.fc15.i686.PAE)