WARNING: at /build/buildd/linux-2.6.31/fs/notify/inotify/inotify_user.c:398 inotify_remove_from_idr+0x7e/0x90()

[Laurent Bonnaud]

Here is the problem:

[163317.511459] ------------[ cut here ]------------
[163317.511472] WARNING: at /build/buildd/linux-2.6.31/fs/notify/inotify/inotify_user.c:398 inotify_remove_from_idr+0x7e/0x90()
[163317.511476] Hardware name: TravelMate 8200
[163317.511478] Modules linked in: nls_iso8859_1 nls_cp437 vfat fat usb_storage vmnet parport_pc vmblock vmci vmmon binfmt_misc bridge stp bnep vboxnetflt vboxnetadp vboxdrv kvm_intel kvm kqemu deflate zlib_deflate ctr twofish twofish_common camellia serpent blowfish cast5 des_generic xcbc rmd160 sha1_generic crypto_null af_key xt_limit xt_tcpudp xt_state sha256_generic ipt_addrtype aes_i586 aes_generic cbc dm_crypt ip6table_filter ip6_tables snd_hda_codec_si3054 nf_nat_irc nf_conntrack_irc snd_hda_codec_realtek nf_nat_ftp nf_nat nf_conntrack_ipv4 arc4 snd_hda_intel snd_hda_codec snd_hwdep ecb nf_defrag_ipv4 snd_pcm_oss nf_conntrack_ftp snd_mixer_oss snd_pcm nf_conntrack snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi iptable_filter iwl3945 gspca_vc032x snd_seq_midi_event irda snd_seq gspca_main pcmcia videodev iwlcore snd_timer ip_tables joydev x_tables yenta_socket crc_ccitt snd_seq_device mac80211 btusb rsrc_nonstatic v4l1_compat pcmcia_core raw1394 snd cfg80211 video1394 sbp2 soundcore snd_page_alloc psmouse ppdev serio_raw acer_wmi parport led_class coretemp dm_raid45 xor usbhid ohci1394 ieee1394 radeon ttm drm i2c_algo_bit e1000e intel_agp agpgart [last unloaded: vmci]
[163317.511597] Pid: 3368, comm: kded4 Not tainted 2.6.31-15-generic-pae #50-Ubuntu
[163317.511600] Call Trace:
[163317.511606] [<c0146a1d>] warn_slowpath_common+0x6d/0xa0
[163317.511611] [<c021a15e>] ? inotify_remove_from_idr+0x7e/0x90
[163317.511615] [<c021a15e>] ? inotify_remove_from_idr+0x7e/0x90
[163317.511618] [<c0146a65>] warn_slowpath_null+0x15/0x20
[163317.511622] [<c021a15e>] inotify_remove_from_idr+0x7e/0x90
[163317.511626] [<c021a5e7>] inotify_ignored_and_remove_idr+0x87/0xb0
[163317.511630] [<c0219958>] inotify_freeing_mark+0x8/0x10
[163317.511634] [<c0218420>] fsnotify_destroy_mark_by_entry+0x120/0x170
[163317.511638] [<c0219f8b>] sys_inotify_rm_watch+0x5b/0xa0
[163317.511643] [<c0103283>] sysenter_do_call+0x12/0x28
[163317.511646] ---[ end trace b6f57d56e5a39822 ]---

There are many duplicates (I will merge them later...) but I'm reporting this because it occurred with a more recent and current kernel version.

ProblemType: Bug
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: bonnaud 3462 F.... pulseaudio
                      bonnaud 3476 F.... kmix
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xd0700000 irq 22'
   Mixer name : 'Realtek ALC883'
   Components : 'HDA:10ec0883,10250000,00100002 HDA:11c13026,11c13026,00100600'
   Controls : 25
   Simple ctrls : 15
Date: Fri Nov 13 08:58:47 2009
DistroRelease: Ubuntu 9.10
HibernationDevice: RESUME=UUID=1a3ad817-928f-4cec-aec5-4ec47ed7f422
MachineType: Acer, inc. TravelMate 8200
Package: linux-image-2.6.31-15-generic-pae 2.6.31-15.50
PccardctlIdent:
 Socket 0:
   no product info available
 Socket 1:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
 Socket 1:
   5.0V 16-bit PC Card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-15-generic-pae root=UUID=aba4a907-9dc5-4a69-8f75-c6e39bdb2c56 ro quiet splash
ProcVersionSignature: Ubuntu 2.6.31-15.50-generic-pae
RelatedPackageVersions:
 linux-backports-modules-2.6.31-15-generic-pae N/A
 linux-firmware 1.25
SourcePackage: linux
Uname: Linux 2.6.31-15-generic-pae i686
WpaSupplicantLog:

dmi.bios.date: 02/08/07
dmi.bios.vendor: Acer
dmi.bios.version: v1.3521
dmi.board.name: Como
dmi.board.vendor: Acer, Inc.
dmi.board.version: Not Applicable
dmi.chassis.type: 1
dmi.chassis.vendor: , Inc.
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAcer:bvrv1.3521:bd02/08/07:svnAcer,inc.:pnTravelMate8200:pvrNotApplicable:rvnAcer,Inc.:rnComo:rvrNotApplicable:cvn,Inc.:ct1:cvrN/A:
dmi.product.name: TravelMate 8200
dmi.product.version: Not Applicable
dmi.sys.vendor: Acer, inc.

[Laurent Bonnaud (laurent-bonnaud)]

I am now running this kernel version (and the previous ones before that):

Linux vougeot 2.6.31-20-generic-pae #57-Ubuntu SMP Mon Feb 8 10:23:59 UTC 2010 i686 GNU/Linux

and I have not seen this bug for a very long time. Have other people who reported a similar bug seen it with a more recent kernel ?

[Peter Popov (xianath)]

I reported one of the duplicates that you've merged. I still see this warning running 2.6.31-19-server (x86_64).

I have a feeling this is related, in my case, to bittorrent traffic. This box is a NAS and SAN serving several diskless boxes over iSCSI, NFS and CIFS, and its gigabit NIC sees a LOT of traffic all the time. However I hadn't seen this warning for over a month. Last week I downloaded and seeded at decent speeds (10-20Mbps) several distro DVDs, and I got three of these warnings in three days, all implicating the 100Mbps NIC. It's all circumstantial, but could be a clue as to the root cause.

Feb 22 19:15:44 nas kernel: [ 9062.040017] ------------[ cut here ]------------
Feb 22 19:15:44 nas kernel: [ 9062.040027] WARNING: at /build/buildd/linux-2.6.31/net/sched/sch_generic.c:246 dev_watchdog+0x262/0x270()
Feb 22 19:15:44 nas kernel: [ 9062.040030] Hardware name: GA-MA770-US3
Feb 22 19:15:44 nas kernel: [ 9062.040032] NETDEV WATCHDOG: eth1 (8139too): transmit queue 0 timed out
Feb 22 19:15:44 nas kernel: [ 9062.040034] Modules linked in: binfmt_misc ppdev iscsi_trgt crc32c ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp nfsd libiscsi_tcp libiscsi scsi_transport_iscsi nfs lockd nfs_acl auth_rpcgss sunrpc iptable_filter ip_tables x_tables i2c_piix4 serio_raw lp amd64_edac_mod edac_core k8temp parport xfs exportfs raid10 raid456 raid6_pq async_xor async_memcpy async_tx xor raid1 raid0 multipath 8139too 8139cp linear r8169 mii
Feb 22 19:15:44 nas kernel: [ 9062.040066] Pid: 0, comm: swapper Not tainted 2.6.31-19-server #56-Ubuntu
Feb 22 19:15:44 nas kernel: [ 9062.040068] Call Trace:
Feb 22 19:15:44 nas kernel: [ 9062.040070] <IRQ> [<ffffffff8105e508>] warn_slowpath_common+0x78/0xb0
Feb 22 19:15:44 nas kernel: [ 9062.040079] [<ffffffff8105e59c>] warn_slowpath_fmt+0x3c/0x40
Feb 22 19:15:44 nas kernel: [ 9062.040082] [<ffffffff8144e322>] dev_watchdog+0x262/0x270
Feb 22 19:15:44 nas kernel: [ 9062.040086] [<ffffffff8107c471>] ? ktime_get_ts+0x51/0x70
Feb 22 19:15:44 nas kernel: [ 9062.040090] [<ffffffff8103435f>] ? hpet_msi_next_event+0xf/0x20
Feb 22 19:15:44 nas kernel: [ 9062.040094] [<ffffffff8108506f>] ? clockevents_program_event+0x4f/0x90
Feb 22 19:15:44 nas kernel: [ 9062.040097] [<ffffffff81086560>] ? tick_dev_program_event+0x40/0xd0
Feb 22 19:15:44 nas kernel: [ 9062.040100] [<ffffffff8144e0c0>] ? dev_watchdog+0x0/0x270
Feb 22 19:15:44 nas kernel: [ 9062.040103] [<ffffffff8106a7fc>] run_timer_softirq+0x16c/0x270
Feb 22 19:15:44 nas kernel: [ 9062.040107] [<ffffffff810650ed>] __do_softirq+0xbd/0x200
Feb 22 19:15:44 nas kernel: [ 9062.040111] [<ffffffff810131ac>] call_softirq+0x1c/0x30
Feb 22 19:15:44 nas kernel: [ 9062.040113] [<ffffffff81014b85>] do_softirq+0x55/0x90
Feb 22 19:15:44 nas kernel: [ 9062.040116] [<ffffffff81064e55>] irq_exit+0x85/0x90
Feb 22 19:15:44 nas kernel: [ 9062.040119] [<ffffffff810140c0>] do_IRQ+0x70/0xe0
Feb 22 19:15:44 nas kernel: [ 9062.040123] [<ffffffff810129d3>] ret_from_intr+0x0/0x11
Feb 22 19:15:44 nas kernel: [ 9062.040124] <EOI> [<ffffffff810356f6>] ? native_safe_halt+0x6/0x10
Feb 22 19:15:44 nas kernel: [ 9062.040130] [<ffffffff8101a0fc>] ? default_idle+0x4c/0xe0...

[Gabe Gorelick (gabegorelick)]

This looks like a duplicate of bug 432860. Laurent's comment that this bug was fixed with an update makes sense, as this bug got fixed with the 2.6.31.6 kernel updated on January 6, 2010 (see bug 480144).

@Peter
The warning that you continue to get is actually a different bug. WARNING: at /build/buildd/linux-2.6.31/net/sched/sch_generic.c:246 dev_watchdog+0x262/0x270() is not related to the inotify_remove_from_idr warning.