Re: kernel bug

From: Eric Paris
Date: Fri Jul 31 2009 - 12:28:01 EST

On Fri, 2009-07-31 at 09:01 -0700, Linus Torvalds wrote:
> Hmm. We have some fsnotify fixes since -rc4 (and I'm planning on doing
> -rc5 today), so it's worth checking if this problem is perhaps already ok.

there is one patch in -rc5 that might fix it

f44aebcc566d1d6275f7191867b9633dc11de2ee

Since i stop using a single static ignored event, but I honestly don't
understand why that fixes it. It looks like the same thing Mikko had
but his magically went away before this patch. (It might have coincided
with when he turned ON SLAB_DEBUG, but I haven't ask him to turn it back
off) I haven't yet found the problem with the original code, if you can
reproduce with -rc5 PLEASE let me know, I've got some debugging code the
other person was trying but he never had problems after we started
debugging......

-Eric

> But looking at the fixes, I don't think any of them affect this particular
> BUG_ON, though, so I'm adding Eric to the email participants list, and
> lkml to keep it archived and google-ready.
>
> This seems to also be
>
> http://bugzilla.kernel.org/show_bug.cgi?id=13729
> http://lkml.org/lkml/2009/7/4/12
>
> with only slight variations.
>
> Linus
>
> On Fri, 31 Jul 2009, Christoph Thielecke wrote:
> >
> > Hello Linus,
> >
> > today my machine stops rapidly (running 2.6.31-rc4). After revisited the log I
> > found 2 kernel bug entries which maybe could useful:
> >
> > Jul 31 11:23:05 develop kernel: ------------[ cut here ]------------
> > Jul 31 11:23:05 develop kernel: kernel BUG at fs/notify/notification.c:93!
> > Jul 31 11:23:05 develop kernel: invalid opcode: 0000 [#1] PREEMPT SMP
> > Jul 31 11:23:05 develop kernel: last sysfs file: /sys/devices/pci0000:00/0000:00:1d.7/usb1/1-4/1-4.1/product
> > Jul 31 11:23:05 develop kernel: Modules linked in: b44 nvidia(P) binfmt_misc ppdev parport_pc lp parport rfcomm l2cap bluetooth tun vboxnetadp vboxnetflt vboxdrv pppol2tp pppox ppp_generic slhc ipv6 capifs acpi_cpufreq cpufreq_ondemand cpufreq_powersave cpufreq_stats freq_table cpufreq_userspace cpufreq_conservative nfsd nfs lockd fscache nfs_acl auth_rpcgss sunrpc deflate zlib_deflate ctr twofish twofish_common camellia serpent blowfish cast5 des_generic cbc aes_i586 aes_generic xcbc rmd160 sha256_generic sha1_generic crypto_null af_key nls_iso8859_1 nls_cp437 vfat fat fuse loop asix pl2303 dm9601 usbnet usbserial usbhid hid snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi firewire_ohci firewire_core arc4 snd_seq_midi_event snd_seq crc_itu_t ecb snd_timer snd_seq_device ssb ohci1394 iwl3945 sdhci_pci sdhci iTCO_wdt iTCO_vendor_support snd pcmcia pcmcia_core iwlcore mmc_core uhci_!
hc!
> d joydev intel_agp i2c_i801 soundcore ieee1394 mii ehci_hcd mac80211 led_class ricoh_mmc agpgart i2c_core snd_page_alloc cfg80211 usbcore psmouse rtc_cmos rtc_core rtc_lib video output serio_raw wmi dell_laptop button battery ac processor rfkill evdev dcdbas sg sr_mod cdrom dm_mirror dm_region_hash dm_log dm_snapshot dm_mod thermal fan sd_mod crc_t10dif [last unloaded: b44]
> > Jul 31 11:23:05 develop kernel:
> > Jul 31 11:23:05 develop kernel: Pid: 8207, comm: kdevelop Tainted: P (2.6.31-rc4 #2) MP061
> > Jul 31 11:23:05 develop kernel: EIP: 0060:[<c10db67b>] EFLAGS: 00210283 CPU: 0
> > Jul 31 11:23:05 develop kernel: EIP is at fsnotify_put_event+0x46/0x4a
> > Jul 31 11:23:05 develop kernel: EAX: f6865d04 EBX: f6865cd0 ECX: 00000000 EDX: bffd8f01
> > Jul 31 11:23:05 develop kernel: ESI: bffd8f72 EDI: f6865cd0 EBP: f15abf0c ESP: f15abf08
> > Jul 31 11:23:05 develop kernel: DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
> > Jul 31 11:23:05 develop kernel: Process kdevelop (pid: 8207, ti=f15aa000 task=f1571130 task.ti=f15aa000)
> > Jul 31 11:23:05 develop kernel: Stack:
> > Jul 31 11:23:05 develop kernel: 00000020 f15abf64 c10dd775 000000b0 bffd8f14 f46488c0 f1fcc174 f1fcc158
> > Jul 31 11:23:05 develop kernel: <0> f1fcc140 bffd8f54 0000000e 00000000 f1571130 c104699f f1fcc178 f1fcc178
> > Jul 31 11:23:05 develop kernel: <0> 00000152 00000002 00000000 00000010 f46488c0 bffd8f14 000000f0 f15abf8c
> > Jul 31 11:23:05 develop kernel: Call Trace:
> > Jul 31 11:23:05 develop kernel: [<c10dd775>] ? inotify_read+0x24a/0x269
> > Jul 31 11:23:05 develop kernel: [<c104699f>] ? autoremove_wake_function+0x0/0x3a
> > Jul 31 11:23:05 develop kernel: [<c10b3206>] ? vfs_read+0x8b/0x142
> > Jul 31 11:23:05 develop kernel: [<c10dd52b>] ? inotify_read+0x0/0x269
> > Jul 31 11:23:05 develop kernel: [<c10b3366>] ? sys_read+0x3d/0x6b
> > Jul 31 11:23:05 develop kernel: [<c1003610>] ? sysenter_do_call+0x12/0x2c
> > Jul 31 11:23:05 develop kernel: Code: 74 1f 8d 43 34 39 43 34 75 21 8b 43 2c e8 ba fe fc ff 89 da a1 c4 23 54 c1 e8 79 ff fc ff 5b 5d c3 8d 43 14 e8 b3 e6 fd ff eb d7 <0f> 0b eb fe 55 89 e5 57 56 53 83 ec 0c 89 c6 8d 40 18 89 45 e8
> > Jul 31 11:23:05 develop kernel: EIP: [<c10db67b>] fsnotify_put_event+0x46/0x4a SS:ESP 0068:f15abf08
> > Jul 31 11:23:05 develop kernel: ---[ end trace 1290e7d176f2655e ]---
> >
> > Jul 31 11:23:17 develop kernel: ------------[ cut here ]------------
> > Jul 31 11:23:17 develop kernel: kernel BUG at fs/notify/notification.c:93!
> > Jul 31 11:23:17 develop kernel: invalid opcode: 0000 [#2] PREEMPT SMP
> > Jul 31 11:23:17 develop kernel: last sysfs file: /sys/devices/pci0000:00/0000:00:1d.7/usb1/1-4/1-4.1/product
> > Jul 31 11:23:17 develop kernel: Modules linked in: b44 nvidia(P) binfmt_misc ppdev parport_pc lp parport rfcomm l2cap bluetooth tun vboxnetadp vboxnetflt vboxdrv pppol2tp pppox ppp_generic slhc ipv6 capifs acpi_cpufreq cpufreq_ondemand cpufreq_powersave cpufreq_stats freq_table cpufreq_userspace cpufreq_conservative nfsd nfs lockd fscache nfs_acl auth_rpcgss sunrpc deflate zlib_deflate ctr twofish twofish_common camellia serpent blowfish cast5 des_generic cbc aes_i586 aes_generic xcbc rmd160 sha256_generic sha1_generic crypto_null af_key nls_iso8859_1 nls_cp437 vfat fat fuse loop asix pl2303 dm9601 usbnet usbserial usbhid hid snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi firewire_ohci firewire_core arc4 snd_seq_midi_event snd_seq crc_itu_t ecb snd_timer snd_seq_device ssb ohci1394 iwl3945 sdhci_pci sdhci iTCO_wdt iTCO_vendor_support snd pcmcia pcmcia_core iwlcore mmc_core uhci_!
hc!
> d joydev intel_agp i2c_i801 soundcore ieee1394 mii ehci_hcd mac80211 led_class ricoh_mmc agpgart i2c_core snd_page_alloc cfg80211 usbcore psmouse rtc_cmos rtc_core rtc_lib video output serio_raw wmi dell_laptop button battery ac processor rfkill evdev dcdbas sg sr_mod cdrom dm_mirror dm_region_hash dm_log dm_snapshot dm_mod thermal fan sd_mod crc_t10dif [last unloaded: b44]
> > Jul 31 11:23:17 develop kernel:
> > Jul 31 11:23:17 develop kernel: Pid: 2462, comm: firefox-bin Tainted: P D (2.6.31-rc4 #2) MP061
> > Jul 31 11:23:17 develop kernel: EIP: 0060:[<c10db67b>] EFLAGS: 00010283 CPU: 0
> > Jul 31 11:23:17 develop kernel: EIP is at fsnotify_put_event+0x46/0x4a
> > Jul 31 11:23:17 develop kernel: EAX: f68656b0 EBX: f686567c ECX: 00000000 EDX: 092aa801
> > Jul 31 11:23:17 develop kernel: ESI: 092aa818 EDI: f686567c EBP: f3f23f0c ESP: f3f23f08
> > Jul 31 11:23:17 develop kernel: DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
> > Jul 31 11:23:17 develop kernel: Process firefox-bin (pid: 2462, ti=f3f22000 task=f06c8b90 task.ti=f3f22000)
> > Jul 31 11:23:17 develop kernel: Stack:
> > Jul 31 11:23:17 develop kernel: 00000030 f3f23f64 c10dd775 00000400 092aa7f0 f1662c40 f29cfef4 f29cfed8
> > Jul 31 11:23:17 develop kernel: <0> f29cfec0 092aa7f0 00000018 00000000 f06c8b90 c104699f f29cfef8 f29cfef8
> > Jul 31 11:23:17 develop kernel: <0> 00000002 00000100 00000000 00000020 f1662c40 092aa7f0 00000400 f3f23f8c
> > Jul 31 11:23:17 develop kernel: Call Trace:
> > Jul 31 11:23:17 develop kernel: [<c10dd775>] ? inotify_read+0x24a/0x269
> > Jul 31 11:23:17 develop kernel: [<c104699f>] ? autoremove_wake_function+0x0/0x3a
> > Jul 31 11:23:17 develop kernel: [<c10b3206>] ? vfs_read+0x8b/0x142
> > Jul 31 11:23:17 develop kernel: [<c10dd52b>] ? inotify_read+0x0/0x269
> > Jul 31 11:23:17 develop kernel: [<c10b3366>] ? sys_read+0x3d/0x6b
> > Jul 31 11:23:17 develop kernel: [<c1003610>] ? sysenter_do_call+0x12/0x2c
> > Jul 31 11:23:17 develop kernel: Code: 74 1f 8d 43 34 39 43 34 75 21 8b 43 2c e8 ba fe fc ff 89 da a1 c4 23 54 c1 e8 79 ff fc ff 5b 5d c3 8d 43 14 e8 b3 e6 fd ff eb d7 <0f> 0b eb fe 55 89 e5 57 56 53 83 ec 0c 89 c6 8d 40 18 89 45 e8
> > Jul 31 11:23:17 develop kernel: EIP: [<c10db67b>] fsnotify_put_event+0x46/0x4a SS:ESP 0068:f3f23f08
> > Jul 31 11:23:17 develop kernel: ---[ end trace 1290e7d176f2655f ]---
> >
> > crissi@develop:~$ uname -a
> > Linux develop 2.6.31-rc4 #2 SMP PREEMPT Mon Jul 27 11:47:00 CEST 2009 i686
> > GNU/Linux
> >
> > crissi@develop:~$ cat /proc/cpuinfo
> > processor : 0
> > vendor_id : GenuineIntel
> > cpu family : 6
> > model : 14
> > model name : Intel(R) Pentium(R) M CPU 000 @ 2.00GHz
> > stepping : 4
> > cpu MHz : 2000.000
> > cache size : 2048 KB
> > physical id : 0
> > siblings : 2
> > core id : 0
> > cpu cores : 2
> > apicid : 0
> > initial apicid : 0
> > fdiv_bug : no
> > hlt_bug : no
> > f00f_bug : no
> > coma_bug : no
> > fpu : yes
> > fpu_exception : yes
> > cpuid level : 10
> > wp : yes
> > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon bts pni monitor vmx est tm2 xtpr pdcm
> > bogomips : 3990.57
> > clflush size : 64
> > power management:
> >
> > processor : 1
> > vendor_id : GenuineIntel
> > cpu family : 6
> > model : 14
> > model name : Intel(R) Pentium(R) M CPU 000 @ 2.00GHz
> > stepping : 4
> > cpu MHz : 2000.000
> > cache size : 2048 KB
> > physical id : 0
> > siblings : 2
> > core id : 1
> > cpu cores : 2
> > apicid : 1
> > initial apicid : 1
> > fdiv_bug : no
> > hlt_bug : no
> > f00f_bug : no
> > coma_bug : no
> > fpu : yes
> > fpu_exception : yes
> > cpuid level : 10
> > wp : yes
> > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon bts pni monitor vmx est tm2 xtpr pdcm
> > bogomips : 3990.06
> > clflush size : 64
> > power management:
> >
> >
> > Its a debian lenny machine with self compiled kernel from kernel.org.
> >
> >
> > Best regards
> > --
> > Linux User Group Wernigerode
> > http://www.lug-wr.de/
> >

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