Mailinglist Archive: opensuse-bugs (4531 mails)

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https://bugzilla.novell.com/show_bug.cgi?id=770760

https://bugzilla.novell.com/show_bug.cgi?id=770760#c0


           Summary: WARNING: at net/sched/sch_generic.c:256
                    dev_watchdog+0x238/0x250
    Classification: openSUSE
           Product: openSUSE 12.2
           Version: Factory
          Platform: x86-64
        OS/Version: openSUSE 12.2
            Status: NEW
          Severity: Major
          Priority: P5 - None
         Component: Kernel
        AssignedTo: kernel-maintainers@xxxxxxxxxxxxxxxxxxxxxx
        ReportedBy: lchiquitto@xxxxxxxx
         QAContact: qa-bugs@xxxxxxx
          Found By: Community User
           Blocker: ---


Booting the Factory kernel (kernel-default-3.4.4-1.6.x86_64) and using it for
regular work for ~1 hour or less always triggers the following warning:

[ 2445.824094] ------------[ cut here ]------------
[ 2445.824116] WARNING: at
/home/abuild/rpmbuild/BUILD/kernel-default-3.4.4/linux-3.4/net/sched/sch_generic.c:256
dev_watchdog+0x238/0x250()
[ 2445.824124] Hardware name: Vostro1310
[ 2445.824129] NETDEV WATCHDOG: eth0 (r8169): transmit queue 0 timed out
[ 2445.824133] Modules linked in: fuse rpcsec_gss_krb5 nfs lockd fscache
auth_rpcgss nfs_acl sunrpc af_packet snd_hda_codec_realtek snd_hda_intel
snd_hda_codec snd_hwdep snd_pcm_oss snd_pcm snd_seq snd_timer snd_seq_device
snd_mixer_oss uvcvideo videobuf2_core videodev videobuf2_vmalloc
videobuf2_memops kvm_intel kvm snd iTCO_wdt sr_mod cdrom arc4 iwl3945 iwlegacy
mac80211 cfg80211 dell_laptop rfkill sdhci_pci sdhci mmc_core dell_wmi
sparse_keymap wmi firewire_ohci firewire_core crc_itu_t soundcore
iTCO_vendor_support snd_page_alloc ata_piix r8169 acpi_cpufreq mperf battery ac
i2c_i801 pcspkr joydev coretemp dcdbas microcode autofs4 dm_mod linear usbhid
uhci_hcd i915 drm_kms_helper drm i2c_algo_bit ehci_hcd button video usbcore
usb_common scsi_dh_hp_sw scsi_dh_rdac scsi_dh_alua scsi_dh_emc scsi_dh fan
processor ata_generic thermal thermal_sys
[ 2445.824285] Pid: 0, comm: swapper/0 Not tainted 3.4.4-1-default #1
[ 2445.824290] Call Trace:
[ 2445.824317]  [<ffffffff81004598>] dump_trace+0x78/0x2c0
[ 2445.824331]  [<ffffffff8152f81b>] dump_stack+0x69/0x6f
[ 2445.824342]  [<ffffffff8103eb09>] warn_slowpath_common+0x79/0xc0
[ 2445.824354]  [<ffffffff8103ec05>] warn_slowpath_fmt+0x45/0x50
[ 2445.824364]  [<ffffffff81463e38>] dev_watchdog+0x238/0x250
[ 2445.824378]  [<ffffffff8104d504>] run_timer_softirq+0x144/0x340
[ 2445.824391]  [<ffffffff810459ee>] __do_softirq+0xae/0x1c0
[ 2445.824402]  [<ffffffff81543c0c>] call_softirq+0x1c/0x30
[ 2445.824412]  [<ffffffff810044e5>] do_softirq+0x75/0xb0
[ 2445.824425]  [<ffffffff81045d85>] irq_exit+0xa5/0xb0
[ 2445.824436]  [<ffffffff8100413b>] do_IRQ+0x5b/0xd0
[ 2445.824449]  [<ffffffff8153afaa>] common_interrupt+0x6a/0x6a
[ 2445.824475]  [<ffffffffa001e990>] arch_local_irq_enable+0x4/0x8 [processor]
[ 2445.824499]  [<ffffffffa001f87f>] acpi_idle_enter_bm+0x224/0x266 [processor]
[ 2445.824520]  [<ffffffff8140fd9d>] cpuidle_idle_call+0x9d/0x240
[ 2445.824533]  [<ffffffff8100b5f5>] cpu_idle+0x65/0xd0
[ 2445.824546]  [<ffffffff81ab9b95>] start_kernel+0x38f/0x39a
[ 2445.824557]  [<ffffffff81ab942b>] x86_64_start_kernel+0x105/0x114
[ 2445.824566] ---[ end trace 4562728c3372a931 ]---

After the first warning, I'm getting interruptions of ~30 seconds or so from
time to time. Every time this happens a "link up" event is printed:

[ 2445.824925] r8169 0000:07:00.0: eth0: link up
[ 3297.824381] r8169 0000:07:00.0: eth0: link up
[ 3795.824382] r8169 0000:07:00.0: eth0: link up

This does NOT happen with the kernel from openSUSE 12.1. According to bugs
reported in Fedora, this seems to affect other NICs, not only r8169:

https://bugzilla.redhat.com/showdependencytree.cgi?id=702723&hide_resolved=0

Also, according to https://bugzilla.redhat.com/show_bug.cgi?id=715137, this
problem (at least for r8169) can be workarounded by reverting this commit:

   036dafa28 "r8169: add byte queue limit support"

I'll test 3.5-rcX now to see if the problem is already fixed upstream.

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