Messages in this thread | | | Date | Tue, 23 Mar 2010 06:43:51 -0400 | From | Jeff Layton <> | Subject | Re: [linux-cifs-client] shutdown bugs, since about 2.6.31 or so |
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On Tue, 23 Mar 2010 09:59:57 +0530 Suresh Jayaraman <sjayaraman@suse.de> wrote:
> Ccing linux-cifs-client@lists.samba.org where most of the cifs > development happens. > > On 03/23/2010 06:20 AM, Gene Heskett wrote: > > Greetings; > > > > I do not know if I am miss-configured or what, and I hadn't worried about it > > extensively because the machine runs fine ANAICT. > > > > But any reboot method short of just pressing the hdwe reset button generates > > quite a lengthy process of repeatedly pressing ctl-alt-del, minimum of 6 > > times I believe, in order to actually do a shutdown, and this isn't at all > > graceful. Not all of it makes it to the log, but here is what does. > > > > Mar 22 16:47:53 coyote kernel: [ 3000.619173] BUG: Dentry d76beaa0{i=2,n=/} > > still in use (1) [unmount of cifs cifs] > > Mar 22 16:47:53 coyote kernel: [ 3000.619191] ------------[ cut here > > ]------------ > > Mar 22 16:47:53 coyote kernel: [ 3000.619303] kernel BUG at fs/dcache.c:676! > > Mar 22 16:47:53 coyote kernel: [ 3000.619420] invalid opcode: 0000 [#1] > > PREEMPT SMP > > Mar 22 16:47:53 coyote kernel: [ 3000.619597] last sysfs file: > > /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/ATK0110:00/hwmon/hwmon0/in3_input > > Mar 22 16:47:53 coyote kernel: [ 3000.619803] Modules linked in: nls_utf8 > > cifs radeon ttm drm_kms_helper drm agpgart nfsd lockd nfs_acl auth_rpcgss > > expo > > rtfs rfcomm sco bnep l2cap autofs4 sunrpc ipv6 or51132 snd_usb_audio > > snd_usb_lib cx88_dvb cx88_vp3054_i2c videobuf_dvb snd_emu10k1_synth > > snd_emux_synth > > snd_seq_virmidi snd_seq_midi_emul dvb_core tuner_simple tuner_types tda9887 > > tda8290 tuner snd_emu10k1 cx8800 cx8802 cx88xx snd_rawmidi snd_ac97_codec ac > > 97_bus snd_seq_dummy i2c_algo_bit snd_seq_oss snd_seq_midi_event snd_seq > > ftdi_sio btusb snd_pcm_oss snd_mixer_oss snd_pcm tveeprom bluetooth > > snd_seq_dev > > ice snd_timer v4l2_common snd_page_alloc videodev snd_util_mem snd_hwdep > > v4l1_compat usbserial btcx_risc snd i2c_nforce2 sg k10temp firewire_ohci > > firewi > > re_core rtc_cmos videobuf_dma_sg sr_mod cdrom pcspkr soundcore videobuf_core > > rtc_core crc_itu_t rfkill hwmon usblp joydev rtc_lib button evdev sd_mod ex > > t3 jbd uhci_hcd ohci_hcd ehci_hcd [last unloaded: asus_atk0110] > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] Pid: 5747, comm: umount.cifs > > Not tainted 2.6.34-rc2 #1 M2N-SLI DELUXE/System Product Name > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] EIP: 0060:[<c10946ae>] EFLAGS: > > 00010246 CPU: 1 > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] EIP is at > > shrink_dcache_for_umount_subtree+0x14b/0x1fe > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] EAX: 0000005b EBX: 00000001 > > ECX: 00000046 EDX: 00000000 > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] ESI: d76beaa0 EDI: d76beafc > > EBP: d55e6f24 ESP: d55e6ef4 > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] DS: 007b ES: 007b FS: 00d8 GS: > > 00e0 SS: 0068 > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] Process umount.cifs (pid: 5747, > > ti=d55e6000 task=d55d8780 task.ti=d55e6000) > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] Stack: > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] c12d20ac d76beaa0 00000002 > > d76beafc 00000001 fa14da01 dc956b64 fa14da01 > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] <0> 0000001b dc956a00 fa14a7b4 > > dc956a00 d55e6f30 c109478e dc956a00 d55e6f40 > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] <0> c1087d38 00000013 fa158a5c > > d55e6f4c c1087e32 dc956a00 d55e6f5c c10883c6 > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] Call Trace: > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] [<c109478e>] ? > > shrink_dcache_for_umount+0x2d/0x37 > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] [<c1087d38>] ? > > generic_shutdown_super+0x15/0xd2 > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] [<c1087e32>] ? > > kill_anon_super+0xc/0x43 > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] [<c10883c6>] ? > > deactivate_super+0x39/0x4b > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] [<c1098dfd>] ? > > mntput_no_expire+0x8c/0xbb > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] [<c10992df>] ? > > sys_umount+0x299/0x2be > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] [<c1002813>] ? > > sysenter_do_call+0x12/0x22 > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] Code: 00 89 45 ec 8b 46 10 8b > > 1e 8b 7e 28 85 c0 74 03 8b 50 20 8d 81 64 01 00 00 50 ff 75 ec 53 57 52 56 6 > > 8 ac 20 2d c1 e8 b5 fc 1b 00 <0f> 0b 83 c4 1c eb fe 8b 7e 1c 39 fe 75 04 31 > > ff eb 03 f0 ff 0f > > Mar 22 16:47:53 coyote kernel: [ 3000.620117] EIP: [<c10946ae>] > > shrink_dcache_for_umount_subtree+0x14b/0x1fe SS:ESP 0068:d55e6ef4 > > Mar 22 16:47:53 coyote kernel: [ 3000.627952] ---[ end trace fbecccbb5fac2d05 > > ]--- > > > > Now, after this point, I have to press ctl-alt-del at least 2 times to get it > > to continue the shutdown, it will timeout 3 times trying to umount /usr, and > > then finally squawk about a cifs mount that is done in my rc.local file. > > That requires 2 more presses of the ctl-alt-del keys, then it finally says > > its shutting down, and 20 to 30 seconds later I have to press them again > > before it actually reverts to the bios to begin the next boot anew. > > > > I have seen this fs/dcache.c line 676 mentioned many times here, and I would > > have thought by now this nuisance would have been spanked. > > > > Thanks. > > > >
Looks like the same bug as reported here:
http://lists.samba.org/archive/linux-cifs-client/2010-February/005560.html
...the patch I asked them to test is now here:
http://git.samba.org/?p=jlayton/linux.git;a=commit;h=fd0ab22278f38b0e2b7d303a1101b15d3255aee9
...but I still think the problem is likely in how we autodisable server inode numbers. A way to reproduce this problem would be very helpful.
-- Jeff Layton <jlayton@samba.org>
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