J. Bruce Fields said the following on 2009-5-13 3:13:
> On Tue, May 12, 2009 at 08:43:41AM +0800, Wang Chen wrote:
>> J. Bruce Fields said the following on 2009-5-12 4:57:
>>> On Mon, May 11, 2009 at 02:13:50PM +0800, Wang Chen wrote:
>>>> J. Bruce Fields said the following on 2009-5-9 2:26:
>>>>> On Thu, May 07, 2009 at 02:51:23PM +0800, Wang Chen wrote:
>>>>>> J. Bruce Fields said the following on 2009-5-7 4:32:
>>>>>>> On Wed, May 06, 2009 at 05:17:20PM +0800, Wang Chen wrote:
>>>>>>>> J. Bruce Fields said the following on 2009-4-25 7:12:
>>>>>>>>> On Fri, Apr 24, 2009 at 11:09:44AM +0800, Wang Chen wrote:
>>>>>>>>>> Although I can't reproduce it now, it really happened that some lock manager
>>>>>>>>>> started grace period but didn't end it.
>>>>>>>>>> This causes an lm entry be left in grace_list, and when service nfs restart,
>>>>>>>>>> the same lm will be added again into the list.
>>>>>>>>>> As you know, adding an entry, which is in the list, to a list will leads to
>>>>>>>>>> list corruption.
>>>>>>>>> I'd really like to understand why locks_end_grace() isn't being called.
>>>>>>>>> I'm probably overlooking something obvious, but I just can't see how
>>>>>>>>> lockd or nfsd can be shut down right now without locks_end_grace() being
>>>>>>>>> called.
>>>>>>>>>
>>>>>>>> Me neither can figure out why locks_end_grace() isn't being called.
>>>>>>>>
>>>>>>>> But do locks_start_grace() twice can trigger this warning too.
>>>>>>>> You can do
>>>>>>>> 1. service nfs restart
>>>>>>>> 2. (immediately) kill -s SIGKILL lockd
>>>>>>>> this can trigger
>>>>>>>> ---
>>>>>>>> lockd(void *vrqstp)
>>>>>>>> ...
>>>>>>>> if (signalled()) {
>>>>>>>> flush_signals(current);
>>>>>>>> if (nlmsvc_ops) {
>>>>>>>> nlmsvc_invalidate_all();
>>>>>>>> set_grace_period();
>>>>>>>> ---
>>>>>>>> and makes locks_start_grace() be called twice without locks_end_grace().
>>>>>>> Ah-hah!
>>>>>>>
>>>>>>>> So I still suggest to do something to protect the lm list. :)
>>>>>>> I wouldn't be opposed to a simple WARN_ON(!list_empty()) in
>>>>>>> locks_start_grace(), but I'm mainly worried about fixing the original
>>>>>>> bug. How about the following?
>>>>>>>
>>>>>> Yeah, the following fix is OK to me, although it only fixed
>>>>>> "start_grace again after start_grace" case.
>>>>> OK, thanks.
>>>>>
>>>>>> The bug about "quit lockd without end_grace", which I encountered before
>>>>>> incidentally, maybe is still there.
>>>>> You're talking about the report that started this thread?:
>>>>>
>>>>> http://marc.info/?l=linux-nfs&m=124054262421444&w=2
>>>>>
>>>> Yes. I mean this.
>>>>
>>>>> It looks to me like that could be explained by two start_grace's in a
>>>>> row.
>>>>>
>>>> But in that report, I didn't post the total message.
>>>> Here are something show that:
>>>> 1. not only lockd has the problem, but nfsd also.
>>>> 2. every time I do "service nfs restart", I got the warning, so this is not
>>>> "two start_grace's in a row" problem.
>>> Once the list is corrupted, it stays corrupted, so that's expected; the
>>> only interesting warning is the first one.
>>>
>> But as you see the logs, nfsd made list corrupted first.
>
> Are you sure? You may be right, I just don't understand why. If you
> look at the definitions in lib/list_debug.c and include/linux/list.h,
> and trace through what would happen e.g. in a sequence like:
>
> list_add(item, head);
> list_add(item, head);
> list_del(item);
> list_add(item, head);
>
> where would corruption first be reported?
>
> I don't think it would be a the first place where the corruption was
> actually *created*. In fact I *think* the warning would first occur on
> the third list_add(), resulting in exactly the behavior seen in your
> logs--but someone should check that.
>
Yes. The warning will be reported on the third list_add().
I was wrong.
So, I am completely has no question about your previous patch.
Thanks Bruce.
> --b.
>
>> Your fix only "two start_grace's in a row" of lockd .
>
>>> --b.
>>>
>>>> Following is more message I got on last month.
>>>> ------------------------------------------------------
>>>> Apr 16 16:35:41 localhost mountd[15061]: Caught signal 15, un-registering and exiting.
>>>> Apr 16 16:35:42 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 16 16:35:43 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 16 16:35:43 localhost kernel: ------------[ cut here ]------------
>>>> Apr 16 16:35:43 localhost kernel: WARNING: at lib/list_debug.c:26 __list_add+0x27/0x5c()
>>>> Apr 16 16:35:43 localhost kernel: Hardware name: Presario M2000 (PT365PA#AB2)
>>>> Apr 16 16:35:43 localhost kernel: list_add corruption. next->prev should be prev (ef8fe958), but was ef8ff128. (next=ef8ff128).
>>>> Apr 16 16:35:43 localhost kernel: Modules linked in: fuse i915 drm i2c_algo_bit nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc ipv6 p4_clockmod dm_multipath uinput snd_intel8x0m snd_intel8x0 snd_seq_dummy snd_ac97_codec ac97_bus snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore 8139cp firewire_ohci firewire_core snd_page_alloc tifm_7xx1 i2c_i801 iTCO_wdt 8139too tifm_core i2c_core yenta_socket crc_itu_t iTCO_vendor_support pcspkr mii rsrc_nonstatic wmi video output ata_generic pata_acpi [last unloaded: microcode]
>>>> Apr 16 16:35:43 localhost kernel: Pid: 17455, comm: rpc.nfsd Tainted: G W 2.6.30-rc2 #3
>>>> Apr 16 16:35:43 localhost kernel: Call Trace:
>>>> Apr 16 16:35:43 localhost kernel: [<c042d5b5>] warn_slowpath+0x71/0xa0
>>>> Apr 16 16:35:43 localhost kernel: [<efc17dec>] ? nfsd4_build_namelist+0x0/0x8e [nfsd]
>>>> Apr 16 16:35:43 localhost kernel: [<c044b12d>] ? trace_hardirqs_on_caller+0x18/0x150
>>>> Apr 16 16:35:43 localhost kernel: [<c051c61a>] ? _raw_spin_lock+0x53/0xfa
>>>> Apr 16 16:35:43 localhost kernel: [<c04a3f66>] ? mntput_no_expire+0x1c/0x101
>>>> Apr 16 16:35:43 localhost kernel: [<c04a0062>] ? dput+0x35/0x103
>>>> Apr 16 16:35:43 localhost kernel: [<c051c61a>] ? _raw_spin_lock+0x53/0xfa
>>>> Apr 16 16:35:43 localhost kernel: [<c051c89f>] __list_add+0x27/0x5c
>>>> Apr 16 16:35:43 localhost kernel: [<ef8f6daa>] locks_start_grace+0x22/0x30 [lockd]
>>>> Apr 16 16:35:43 localhost kernel: [<efc13a49>] nfs4_state_start+0x7a/0xdd [nfsd]
>>>> Apr 16 16:35:43 localhost kernel: [<efbfd5be>] nfsd_svc+0x57/0xf9 [nfsd]
>>>> Apr 16 16:35:43 localhost kernel: [<efbfdff6>] ? write_threads+0x0/0x59 [nfsd]
>>>> Apr 16 16:35:43 localhost kernel: [<efbfe02b>] write_threads+0x35/0x59 [nfsd]
>>>> Apr 16 16:35:43 localhost kernel: [<efbfd84d>] nfsctl_transaction_write+0x3b/0x58 [nfsd]
>>>> Apr 16 16:35:43 localhost kernel: [<efbfd812>] ? nfsctl_transaction_write+0x0/0x58 [nfsd]
>>>> Apr 16 16:35:43 localhost kernel: [<c04927af>] vfs_write+0x7c/0xad
>>>> Apr 16 16:35:43 localhost kernel: [<c0492879>] sys_write+0x3b/0x60
>>>> Apr 16 16:35:43 localhost kernel: [<c0403148>] sysenter_do_call+0x12/0x3c
>>>> Apr 16 16:35:43 localhost kernel: ---[ end trace fa484bd6d19ade87 ]---
>>>> Apr 16 16:35:43 localhost kernel: NFSD: starting 90-second grace period
>>>> ...snip...
>>>> Apr 17 13:02:54 localhost mountd[17468]: Caught signal 15, un-registering and exiting.
>>>> Apr 17 13:02:54 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 17 13:02:55 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 17 13:02:55 localhost kernel: ------------[ cut here ]------------
>>>> Apr 17 13:02:55 localhost kernel: WARNING: at lib/list_debug.c:26 __list_add+0x27/0x5c()
>>>> Apr 17 13:02:55 localhost kernel: Hardware name: Presario M2000 (PT365PA#AB2)
>>>> Apr 17 13:02:55 localhost kernel: list_add corruption. next->prev should be prev (ef8fe958), but was ef8ff128. (next=ef8ff128).
>>>> Apr 17 13:02:55 localhost kernel: Modules linked in: fuse i915 drm i2c_algo_bit nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc ipv6 p4_clockmod dm_multipath uinput snd_intel8x0m snd_intel8x0 snd_seq_dummy snd_ac97_codec ac97_bus snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore 8139cp firewire_ohci firewire_core snd_page_alloc tifm_7xx1 i2c_i801 iTCO_wdt 8139too tifm_core i2c_core yenta_socket crc_itu_t iTCO_vendor_support pcspkr mii rsrc_nonstatic wmi video output ata_generic pata_acpi [last unloaded: microcode]
>>>> Apr 17 13:02:55 localhost kernel: Pid: 22642, comm: rpc.nfsd Tainted: G W 2.6.30-rc2 #3
>>>> Apr 17 13:02:55 localhost kernel: Call Trace:
>>>> Apr 17 13:02:55 localhost kernel: [<c042d5b5>] warn_slowpath+0x71/0xa0
>>>> Apr 17 13:02:55 localhost kernel: [<efc17dec>] ? nfsd4_build_namelist+0x0/0x8e [nfsd]
>>>> Apr 17 13:02:55 localhost kernel: [<c044b12d>] ? trace_hardirqs_on_caller+0x18/0x150
>>>> Apr 17 13:02:55 localhost kernel: [<c051c61a>] ? _raw_spin_lock+0x53/0xfa
>>>> Apr 17 13:02:55 localhost kernel: [<c04a3f66>] ? mntput_no_expire+0x1c/0x101
>>>> Apr 17 13:02:55 localhost kernel: [<c04a0062>] ? dput+0x35/0x103
>>>> Apr 17 13:02:55 localhost kernel: [<c051c61a>] ? _raw_spin_lock+0x53/0xfa
>>>> Apr 17 13:02:55 localhost kernel: [<c051c89f>] __list_add+0x27/0x5c
>>>> Apr 17 13:02:55 localhost kernel: [<ef8f6daa>] locks_start_grace+0x22/0x30 [lockd]
>>>> Apr 17 13:02:55 localhost kernel: [<efc13a49>] nfs4_state_start+0x7a/0xdd [nfsd]
>>>> Apr 17 13:02:55 localhost kernel: [<efbfd5be>] nfsd_svc+0x57/0xf9 [nfsd]
>>>> Apr 17 13:02:55 localhost kernel: [<efbfdff6>] ? write_threads+0x0/0x59 [nfsd]
>>>> Apr 17 13:02:55 localhost kernel: [<efbfe02b>] write_threads+0x35/0x59 [nfsd]
>>>> Apr 17 13:02:55 localhost kernel: [<efbfd84d>] nfsctl_transaction_write+0x3b/0x58 [nfsd]
>>>> Apr 17 13:02:55 localhost kernel: [<efbfd812>] ? nfsctl_transaction_write+0x0/0x58 [nfsd]
>>>> Apr 17 13:02:55 localhost kernel: [<c04927af>] vfs_write+0x7c/0xad
>>>> Apr 17 13:02:55 localhost kernel: [<c0492879>] sys_write+0x3b/0x60
>>>> Apr 17 13:02:55 localhost kernel: [<c0403148>] sysenter_do_call+0x12/0x3c
>>>> Apr 17 13:02:55 localhost kernel: ---[ end trace fa484bd6d19ade88 ]---
>>>> Apr 17 13:02:55 localhost kernel: NFSD: starting 90-second grace period
>>>> Apr 17 13:04:07 localhost mountd[22655]: Caught signal 15, un-registering and exiting.
>>>> Apr 17 13:04:07 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 17 13:04:07 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 17 13:04:07 localhost kernel: NFSD: starting 90-second grace period
>>>> Apr 17 13:05:04 localhost mountd[22760]: Caught signal 15, un-registering and exiting.
>>>> Apr 17 13:05:04 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 17 13:05:05 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 17 13:05:05 localhost kernel: NFSD: starting 90-second grace period
>>>> Apr 17 13:06:10 localhost mountd[22859]: Caught signal 15, un-registering and exiting.
>>>> Apr 17 13:06:10 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 17 13:06:10 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 17 13:06:10 localhost kernel: NFSD: starting 90-second grace period
>>>> Apr 17 13:08:07 localhost mountd[22960]: Caught signal 15, un-registering and exiting.
>>>> Apr 17 13:08:07 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 17 13:08:07 localhost kernel: ------------[ cut here ]------------
>>>> Apr 17 13:08:07 localhost kernel: WARNING: at lib/list_debug.c:26 __list_add+0x27/0x5c()
>>>> Apr 17 13:08:07 localhost kernel: Hardware name: Presario M2000 (PT365PA#AB2)
>>>> Apr 17 13:08:07 localhost kernel: list_add corruption. next->prev should be prev (ef8fe958), but was ef8ff128. (next=ef8ff128).
>>>> Apr 17 13:08:07 localhost kernel: Modules linked in: fuse i915 drm i2c_algo_bit nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc ipv6 p4_clockmod dm_multipath uinput snd_intel8x0m snd_intel8x0 snd_seq_dummy snd_ac97_codec ac97_bus snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore 8139cp firewire_ohci firewire_core snd_page_alloc tifm_7xx1 i2c_i801 iTCO_wdt 8139too tifm_core i2c_core yenta_socket crc_itu_t iTCO_vendor_support pcspkr mii rsrc_nonstatic wmi video output ata_generic pata_acpi [last unloaded: microcode]
>>>> Apr 17 13:08:07 localhost kernel: Pid: 23062, comm: lockd Tainted: G W 2.6.30-rc2 #3
>>>> Apr 17 13:08:07 localhost kernel: Call Trace:
>>>> Apr 17 13:08:07 localhost kernel: [<c042d5b5>] warn_slowpath+0x71/0xa0
>>>> Apr 17 13:08:07 localhost kernel: [<c0422a96>] ? update_curr+0x11d/0x125
>>>> Apr 17 13:08:07 localhost kernel: [<c044b12d>] ? trace_hardirqs_on_caller+0x18/0x150
>>>> Apr 17 13:08:07 localhost kernel: [<c044b270>] ? trace_hardirqs_on+0xb/0xd
>>>> Apr 17 13:08:07 localhost kernel: [<c051c61a>] ? _raw_spin_lock+0x53/0xfa
>>>> Apr 17 13:08:07 localhost kernel: [<c051c89f>] __list_add+0x27/0x5c
>>>> Apr 17 13:08:07 localhost kernel: [<ef8f6daa>] locks_start_grace+0x22/0x30 [lockd]
>>>> Apr 17 13:08:07 localhost kernel: [<ef8f34da>] set_grace_period+0x39/0x53 [lockd]
>>>> Apr 17 13:08:07 localhost kernel: [<c06b8921>] ? lock_kernel+0x1c/0x28
>>>> Apr 17 13:08:07 localhost kernel: [<ef8f3558>] lockd+0x64/0x164 [lockd]
>>>> Apr 17 13:08:07 localhost kernel: [<c044b12d>] ? trace_hardirqs_on_caller+0x18/0x150
>>>> Apr 17 13:08:07 localhost kernel: [<c04227b0>] ? complete+0x34/0x3e
>>>> Apr 17 13:08:07 localhost kernel: [<ef8f34f4>] ? lockd+0x0/0x164 [lockd]
>>>> Apr 17 13:08:07 localhost kernel: [<ef8f34f4>] ? lockd+0x0/0x164 [lockd]
>>>> Apr 17 13:08:07 localhost kernel: [<c043dd42>] kthread+0x45/0x6b
>>>> Apr 17 13:08:07 localhost kernel: [<c043dcfd>] ? kthread+0x0/0x6b
>>>> Apr 17 13:08:07 localhost kernel: [<c0403c23>] kernel_thread_helper+0x7/0x10
>>>> Apr 17 13:08:07 localhost kernel: ---[ end trace fa484bd6d19ade89 ]---
>>>> Apr 17 13:08:07 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 17 13:08:07 localhost kernel: NFSD: starting 90-second grace period
>>>> Apr 17 14:39:45 localhost mountd[23074]: Caught signal 15, un-registering and exiting.
>>>> Apr 17 14:39:45 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 17 14:39:45 localhost kernel: ------------[ cut here ]------------
>>>> Apr 17 14:39:45 localhost kernel: WARNING: at lib/list_debug.c:26 __list_add+0x27/0x5c()
>>>> Apr 17 14:39:45 localhost kernel: Hardware name: Presario M2000 (PT365PA#AB2)
>>>> Apr 17 14:39:45 localhost kernel: list_add corruption. next->prev should be prev (ef8fe958), but was ef8ff128. (next=ef8ff128).
>>>> Apr 17 14:39:45 localhost kernel: Modules linked in: fuse i915 drm i2c_algo_bit nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc ipv6 p4_clockmod dm_multipath uinput snd_intel8x0m snd_intel8x0 snd_seq_dummy snd_ac97_codec ac97_bus snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore 8139cp firewire_ohci firewire_core snd_page_alloc tifm_7xx1 i2c_i801 iTCO_wdt 8139too tifm_core i2c_core yenta_socket crc_itu_t iTCO_vendor_support pcspkr mii rsrc_nonstatic wmi video output ata_generic pata_acpi [last unloaded: microcode]
>>>> Apr 17 14:39:45 localhost kernel: Pid: 24287, comm: lockd Tainted: G W 2.6.30-rc2 #3
>>>> Apr 17 14:39:45 localhost kernel: Call Trace:
>>>> Apr 17 14:39:45 localhost kernel: [<c042d5b5>] warn_slowpath+0x71/0xa0
>>>> Apr 17 14:39:45 localhost kernel: [<c0422a96>] ? update_curr+0x11d/0x125
>>>> Apr 17 14:39:45 localhost kernel: [<c044b12d>] ? trace_hardirqs_on_caller+0x18/0x150
>>>> Apr 17 14:39:45 localhost kernel: [<c044b270>] ? trace_hardirqs_on+0xb/0xd
>>>> Apr 17 14:39:45 localhost kernel: [<c051c61a>] ? _raw_spin_lock+0x53/0xfa
>>>> Apr 17 14:39:45 localhost kernel: [<c051c89f>] __list_add+0x27/0x5c
>>>> Apr 17 14:39:45 localhost kernel: [<ef8f6daa>] locks_start_grace+0x22/0x30 [lockd]
>>>> Apr 17 14:39:45 localhost kernel: [<ef8f34da>] set_grace_period+0x39/0x53 [lockd]
>>>> Apr 17 14:39:45 localhost kernel: [<c06b8921>] ? lock_kernel+0x1c/0x28
>>>> Apr 17 14:39:45 localhost kernel: [<ef8f3558>] lockd+0x64/0x164 [lockd]
>>>> Apr 17 14:39:45 localhost kernel: [<c044b12d>] ? trace_hardirqs_on_caller+0x18/0x150
>>>> Apr 17 14:39:45 localhost kernel: [<c04227b0>] ? complete+0x34/0x3e
>>>> Apr 17 14:39:45 localhost kernel: [<ef8f34f4>] ? lockd+0x0/0x164 [lockd]
>>>> Apr 17 14:39:45 localhost kernel: [<ef8f34f4>] ? lockd+0x0/0x164 [lockd]
>>>> Apr 17 14:39:45 localhost kernel: [<c043dd42>] kthread+0x45/0x6b
>>>> Apr 17 14:39:45 localhost kernel: [<c043dcfd>] ? kthread+0x0/0x6b
>>>> Apr 17 14:39:45 localhost kernel: [<c0403c23>] kernel_thread_helper+0x7/0x10
>>>> Apr 17 14:39:45 localhost kernel: ---[ end trace fa484bd6d19ade8a ]---
>>>> Apr 17 14:39:45 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 17 14:39:45 localhost kernel: NFSD: starting 90-second grace period
>>>> Apr 17 14:41:32 localhost mountd[24299]: Caught signal 15, un-registering and exiting.
>>>> Apr 17 14:41:32 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 17 14:41:33 localhost kernel: ------------[ cut here ]------------
>>>> Apr 17 14:41:33 localhost kernel: WARNING: at lib/list_debug.c:26 __list_add+0x27/0x5c()
>>>> Apr 17 14:41:33 localhost kernel: Hardware name: Presario M2000 (PT365PA#AB2)
>>>> Apr 17 14:41:33 localhost kernel: list_add corruption. next->prev should be prev (ef8fe958), but was ef8ff128. (next=ef8ff128).
>>>> Apr 17 14:41:33 localhost kernel: Modules linked in: fuse i915 drm i2c_algo_bit nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc ipv6 p4_clockmod dm_multipath uinput snd_intel8x0m snd_intel8x0 snd_seq_dummy snd_ac97_codec ac97_bus snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore 8139cp firewire_ohci firewire_core snd_page_alloc tifm_7xx1 i2c_i801 iTCO_wdt 8139too tifm_core i2c_core yenta_socket crc_itu_t iTCO_vendor_support pcspkr mii rsrc_nonstatic wmi video output ata_generic pata_acpi [last unloaded: microcode]
>>>> Apr 17 14:41:33 localhost kernel: Pid: 24399, comm: lockd Tainted: G W 2.6.30-rc2 #3
>>>> Apr 17 14:41:33 localhost kernel: Call Trace:
>>>> Apr 17 14:41:33 localhost kernel: [<c042d5b5>] warn_slowpath+0x71/0xa0
>>>> Apr 17 14:41:33 localhost kernel: [<c0422a96>] ? update_curr+0x11d/0x125
>>>> Apr 17 14:41:33 localhost kernel: [<c044b12d>] ? trace_hardirqs_on_caller+0x18/0x150
>>>> Apr 17 14:41:33 localhost kernel: [<c044b270>] ? trace_hardirqs_on+0xb/0xd
>>>> Apr 17 14:41:33 localhost kernel: [<c051c61a>] ? _raw_spin_lock+0x53/0xfa
>>>> Apr 17 14:41:33 localhost kernel: [<c051c89f>] __list_add+0x27/0x5c
>>>> Apr 17 14:41:33 localhost kernel: [<ef8f6daa>] locks_start_grace+0x22/0x30 [lockd]
>>>> Apr 17 14:41:33 localhost kernel: [<ef8f34da>] set_grace_period+0x39/0x53 [lockd]
>>>> Apr 17 14:41:33 localhost kernel: [<c06b8921>] ? lock_kernel+0x1c/0x28
>>>> Apr 17 14:41:33 localhost kernel: [<ef8f3558>] lockd+0x64/0x164 [lockd]
>>>> Apr 17 14:41:33 localhost kernel: [<c044b12d>] ? trace_hardirqs_on_caller+0x18/0x150
>>>> Apr 17 14:41:33 localhost kernel: [<c04227b0>] ? complete+0x34/0x3e
>>>> Apr 17 14:41:33 localhost kernel: [<ef8f34f4>] ? lockd+0x0/0x164 [lockd]
>>>> Apr 17 14:41:33 localhost kernel: [<ef8f34f4>] ? lockd+0x0/0x164 [lockd]
>>>> Apr 17 14:41:33 localhost kernel: [<c043dd42>] kthread+0x45/0x6b
>>>> Apr 17 14:41:33 localhost kernel: [<c043dcfd>] ? kthread+0x0/0x6b
>>>> Apr 17 14:41:33 localhost kernel: [<c0403c23>] kernel_thread_helper+0x7/0x10
>>>> Apr 17 14:41:33 localhost kernel: ---[ end trace fa484bd6d19ade8b ]---
>>>> Apr 17 14:41:33 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 17 14:41:33 localhost kernel: NFSD: starting 90-second grace period
>>>> Apr 17 14:42:16 localhost mountd[24411]: Caught signal 15, un-registering and exiting.
>>>> Apr 17 14:42:17 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 17 14:42:17 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 17 14:42:17 localhost kernel: NFSD: starting 90-second grace period
>>>> Apr 17 14:42:52 localhost mountd[24508]: Caught signal 15, un-registering and exiting.
>>>> Apr 17 14:42:52 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 17 14:42:53 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 17 14:42:53 localhost kernel: NFSD: starting 90-second grace period
>>>> Apr 17 14:43:28 localhost mountd[24602]: Caught signal 15, un-registering and exiting.
>>>> Apr 17 14:43:28 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 17 14:43:29 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 17 14:43:29 localhost kernel: NFSD: starting 90-second grace period
>>>> Apr 17 14:43:59 localhost mountd[24697]: Caught signal 15, un-registering and exiting.
>>>> Apr 17 14:43:59 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 17 14:44:00 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 17 14:44:00 localhost kernel: NFSD: starting 90-second grace period
>>>> Apr 17 14:44:28 localhost mountd[24791]: Caught signal 15, un-registering and exiting.
>>>> Apr 17 14:44:28 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 17 14:44:29 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 17 14:44:29 localhost kernel: NFSD: starting 90-second grace period
>>>> Apr 17 14:45:33 localhost mountd[24885]: Caught signal 15, un-registering and exiting.
>>>> Apr 17 14:45:33 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 17 14:45:34 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 17 14:45:34 localhost kernel: NFSD: starting 90-second grace period
>>>> Apr 17 14:46:05 localhost mountd[24988]: Caught signal 15, un-registering and exiting.
>>>> Apr 17 14:46:05 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 17 14:46:05 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 17 14:46:05 localhost kernel: NFSD: starting 90-second grace period
>>>> Apr 17 14:46:34 localhost mountd[25082]: Caught signal 15, un-registering and exiting.
>>>> Apr 17 14:46:34 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 17 14:46:35 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 17 14:46:35 localhost kernel: NFSD: starting 90-second grace period
>>>> Apr 17 15:35:01 localhost mountd[25176]: Caught signal 15, un-registering and exiting.
>>>> Apr 17 15:35:02 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 17 15:35:02 localhost kernel: ------------[ cut here ]------------
>>>> Apr 17 15:35:02 localhost kernel: WARNING: at lib/list_debug.c:26 __list_add+0x27/0x5c()
>>>> Apr 17 15:35:02 localhost kernel: Hardware name: Presario M2000 (PT365PA#AB2)
>>>> Apr 17 15:35:02 localhost kernel: list_add corruption. next->prev should be prev (ef8fe958), but was ef8ff128. (next=ef8ff128).
>>>> Apr 17 15:35:02 localhost kernel: Modules linked in: fuse i915 drm i2c_algo_bit nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc ipv6 p4_clockmod dm_multipath uinput snd_intel8x0m snd_intel8x0 snd_seq_dummy snd_ac97_codec ac97_bus snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore 8139cp firewire_ohci firewire_core snd_page_alloc tifm_7xx1 i2c_i801 iTCO_wdt 8139too tifm_core i2c_core yenta_socket crc_itu_t iTCO_vendor_support pcspkr mii rsrc_nonstatic wmi video output ata_generic pata_acpi [last unloaded: microcode]
>>>> Apr 17 15:35:02 localhost kernel: Pid: 25883, comm: lockd Tainted: G W 2.6.30-rc2 #3
>>>> Apr 17 15:35:02 localhost kernel: Call Trace:
>>>> Apr 17 15:35:02 localhost kernel: [<c042d5b5>] warn_slowpath+0x71/0xa0
>>>> Apr 17 15:35:02 localhost kernel: [<c0422a96>] ? update_curr+0x11d/0x125
>>>> Apr 17 15:35:02 localhost kernel: [<c044b12d>] ? trace_hardirqs_on_caller+0x18/0x150
>>>> Apr 17 15:35:02 localhost kernel: [<c044b270>] ? trace_hardirqs_on+0xb/0xd
>>>> Apr 17 15:35:02 localhost kernel: [<c051c61a>] ? _raw_spin_lock+0x53/0xfa
>>>> Apr 17 15:35:02 localhost kernel: [<c051c89f>] __list_add+0x27/0x5c
>>>> Apr 17 15:35:02 localhost kernel: [<ef8f6daa>] locks_start_grace+0x22/0x30 [lockd]
>>>> Apr 17 15:35:02 localhost kernel: [<ef8f34da>] set_grace_period+0x39/0x53 [lockd]
>>>> Apr 17 15:35:02 localhost kernel: [<c06b8921>] ? lock_kernel+0x1c/0x28
>>>> Apr 17 15:35:02 localhost kernel: [<ef8f3558>] lockd+0x64/0x164 [lockd]
>>>> Apr 17 15:35:02 localhost kernel: [<c044b12d>] ? trace_hardirqs_on_caller+0x18/0x150
>>>> Apr 17 15:35:02 localhost kernel: [<c04227b0>] ? complete+0x34/0x3e
>>>> Apr 17 15:35:02 localhost kernel: [<ef8f34f4>] ? lockd+0x0/0x164 [lockd]
>>>> Apr 17 15:35:02 localhost kernel: [<ef8f34f4>] ? lockd+0x0/0x164 [lockd]
>>>> Apr 17 15:35:02 localhost kernel: [<c043dd42>] kthread+0x45/0x6b
>>>> Apr 17 15:35:02 localhost kernel: [<c043dcfd>] ? kthread+0x0/0x6b
>>>> Apr 17 15:35:02 localhost kernel: [<c0403c23>] kernel_thread_helper+0x7/0x10
>>>> Apr 17 15:35:02 localhost kernel: ---[ end trace fa484bd6d19ade8c ]---
>>>> Apr 17 15:35:02 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 17 15:35:02 localhost kernel: NFSD: starting 90-second grace period
>>>> Apr 17 15:55:22 localhost mountd[25895]: Caught signal 15, un-registering and exiting.
>>>> Apr 17 15:55:22 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 17 15:55:23 localhost kernel: ------------[ cut here ]------------
>>>> Apr 17 15:55:23 localhost kernel: WARNING: at lib/list_debug.c:26 __list_add+0x27/0x5c()
>>>> Apr 17 15:55:23 localhost kernel: Hardware name: Presario M2000 (PT365PA#AB2)
>>>> Apr 17 15:55:23 localhost kernel: list_add corruption. next->prev should be prev (ef8fe958), but was ef8ff128. (next=ef8ff128).
>>>> Apr 17 15:55:23 localhost kernel: Modules linked in: fuse i915 drm i2c_algo_bit nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc ipv6 p4_clockmod dm_multipath uinput snd_intel8x0m snd_intel8x0 snd_seq_dummy snd_ac97_codec ac97_bus snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore 8139cp firewire_ohci firewire_core snd_page_alloc tifm_7xx1 i2c_i801 iTCO_wdt 8139too tifm_core i2c_core yenta_socket crc_itu_t iTCO_vendor_support pcspkr mii rsrc_nonstatic wmi video output ata_generic pata_acpi [last unloaded: microcode]
>>>> Apr 17 15:55:23 localhost kernel: Pid: 26230, comm: lockd Tainted: G W 2.6.30-rc2 #3
>>>> Apr 17 15:55:23 localhost kernel: Call Trace:
>>>> Apr 17 15:55:23 localhost kernel: [<c042d5b5>] warn_slowpath+0x71/0xa0
>>>> Apr 17 15:55:23 localhost kernel: [<c0422a96>] ? update_curr+0x11d/0x125
>>>> Apr 17 15:55:23 localhost kernel: [<c044b12d>] ? trace_hardirqs_on_caller+0x18/0x150
>>>> Apr 17 15:55:23 localhost kernel: [<c044b270>] ? trace_hardirqs_on+0xb/0xd
>>>> Apr 17 15:55:23 localhost kernel: [<c051c61a>] ? _raw_spin_lock+0x53/0xfa
>>>> Apr 17 15:55:23 localhost kernel: [<c051c89f>] __list_add+0x27/0x5c
>>>> Apr 17 15:55:23 localhost kernel: [<ef8f6daa>] locks_start_grace+0x22/0x30 [lockd]
>>>> Apr 17 15:55:23 localhost kernel: [<ef8f34da>] set_grace_period+0x39/0x53 [lockd]
>>>> Apr 17 15:55:23 localhost kernel: [<c06b8921>] ? lock_kernel+0x1c/0x28
>>>> Apr 17 15:55:23 localhost kernel: [<ef8f3558>] lockd+0x64/0x164 [lockd]
>>>> Apr 17 15:55:23 localhost kernel: [<c044b12d>] ? trace_hardirqs_on_caller+0x18/0x150
>>>> Apr 17 15:55:23 localhost kernel: [<c04227b0>] ? complete+0x34/0x3e
>>>> Apr 17 15:55:23 localhost kernel: [<ef8f34f4>] ? lockd+0x0/0x164 [lockd]
>>>> Apr 17 15:55:23 localhost kernel: [<ef8f34f4>] ? lockd+0x0/0x164 [lockd]
>>>> Apr 17 15:55:23 localhost kernel: [<c043dd42>] kthread+0x45/0x6b
>>>> Apr 17 15:55:23 localhost kernel: [<c043dcfd>] ? kthread+0x0/0x6b
>>>> Apr 17 15:55:23 localhost kernel: [<c0403c23>] kernel_thread_helper+0x7/0x10
>>>> Apr 17 15:55:23 localhost kernel: ---[ end trace fa484bd6d19ade8d ]---
>>>> Apr 17 15:55:23 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 17 15:55:23 localhost kernel: NFSD: starting 90-second grace period
>>>> Apr 17 16:54:27 localhost mountd[26242]: Caught signal 15, un-registering and exiting.
>>>> Apr 17 16:54:27 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 17 16:54:28 localhost kernel: ------------[ cut here ]------------
>>>> Apr 17 16:54:28 localhost kernel: WARNING: at lib/list_debug.c:26 __list_add+0x27/0x5c()
>>>> Apr 17 16:54:28 localhost kernel: Hardware name: Presario M2000 (PT365PA#AB2)
>>>> Apr 17 16:54:28 localhost kernel: list_add corruption. next->prev should be prev (ef8fe958), but was ef8ff128. (next=ef8ff128).
>>>> Apr 17 16:54:28 localhost kernel: Modules linked in: fuse i915 drm i2c_algo_bit nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc ipv6 p4_clockmod dm_multipath uinput snd_intel8x0m snd_intel8x0 snd_seq_dummy snd_ac97_codec ac97_bus snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore 8139cp firewire_ohci firewire_core snd_page_alloc tifm_7xx1 i2c_i801 iTCO_wdt 8139too tifm_core i2c_core yenta_socket crc_itu_t iTCO_vendor_support pcspkr mii rsrc_nonstatic wmi video output ata_generic pata_acpi [last unloaded: microcode]
>>>> Apr 17 16:54:28 localhost kernel: Pid: 27044, comm: lockd Tainted: G W 2.6.30-rc2 #3
>>>> Apr 17 16:54:28 localhost kernel: Call Trace:
>>>> Apr 17 16:54:28 localhost kernel: [<c042d5b5>] warn_slowpath+0x71/0xa0
>>>> Apr 17 16:54:28 localhost kernel: [<c0422a96>] ? update_curr+0x11d/0x125
>>>> Apr 17 16:54:28 localhost kernel: [<c044b12d>] ? trace_hardirqs_on_caller+0x18/0x150
>>>> Apr 17 16:54:28 localhost kernel: [<c044b270>] ? trace_hardirqs_on+0xb/0xd
>>>> Apr 17 16:54:28 localhost kernel: [<c051c61a>] ? _raw_spin_lock+0x53/0xfa
>>>> Apr 17 16:54:28 localhost kernel: [<c051c89f>] __list_add+0x27/0x5c
>>>> Apr 17 16:54:28 localhost kernel: [<ef8f6daa>] locks_start_grace+0x22/0x30 [lockd]
>>>> Apr 17 16:54:28 localhost kernel: [<ef8f34da>] set_grace_period+0x39/0x53 [lockd]
>>>> Apr 17 16:54:28 localhost kernel: [<c06b8921>] ? lock_kernel+0x1c/0x28
>>>> Apr 17 16:54:28 localhost kernel: [<ef8f3558>] lockd+0x64/0x164 [lockd]
>>>> Apr 17 16:54:28 localhost kernel: [<c044b12d>] ? trace_hardirqs_on_caller+0x18/0x150
>>>> Apr 17 16:54:28 localhost kernel: [<c04227b0>] ? complete+0x34/0x3e
>>>> Apr 17 16:54:28 localhost kernel: [<ef8f34f4>] ? lockd+0x0/0x164 [lockd]
>>>> Apr 17 16:54:28 localhost kernel: [<ef8f34f4>] ? lockd+0x0/0x164 [lockd]
>>>> Apr 17 16:54:28 localhost kernel: [<c043dd42>] kthread+0x45/0x6b
>>>> Apr 17 16:54:28 localhost kernel: [<c043dcfd>] ? kthread+0x0/0x6b
>>>> Apr 17 16:54:28 localhost kernel: [<c0403c23>] kernel_thread_helper+0x7/0x10
>>>> Apr 17 16:54:28 localhost kernel: ---[ end trace fa484bd6d19ade8e ]---
>>>> Apr 17 16:54:28 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 17 16:54:28 localhost kernel: NFSD: starting 90-second grace period
>>>> Apr 17 16:59:55 localhost mountd[27056]: Caught signal 15, un-registering and exiting.
>>>> Apr 17 16:59:55 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 17 16:59:56 localhost kernel: ------------[ cut here ]------------
>>>> Apr 17 16:59:56 localhost kernel: WARNING: at lib/list_debug.c:26 __list_add+0x27/0x5c()
>>>> Apr 17 16:59:56 localhost kernel: Hardware name: Presario M2000 (PT365PA#AB2)
>>>> Apr 17 16:59:56 localhost kernel: list_add corruption. next->prev should be prev (ef8fe958), but was ef8ff128. (next=ef8ff128).
>>>> Apr 17 16:59:56 localhost kernel: Modules linked in: fuse i915 drm i2c_algo_bit nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc ipv6 p4_clockmod dm_multipath uinput snd_intel8x0m snd_intel8x0 snd_seq_dummy snd_ac97_codec ac97_bus snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore 8139cp firewire_ohci firewire_core snd_page_alloc tifm_7xx1 i2c_i801 iTCO_wdt 8139too tifm_core i2c_core yenta_socket crc_itu_t iTCO_vendor_support pcspkr mii rsrc_nonstatic wmi video output ata_generic pata_acpi [last unloaded: microcode]
>>>> Apr 17 16:59:56 localhost kernel: Pid: 27197, comm: lockd Tainted: G W 2.6.30-rc2 #3
>>>> Apr 17 16:59:56 localhost kernel: Call Trace:
>>>> Apr 17 16:59:56 localhost kernel: [<c042d5b5>] warn_slowpath+0x71/0xa0
>>>> Apr 17 16:59:56 localhost kernel: [<c0422a96>] ? update_curr+0x11d/0x125
>>>> Apr 17 16:59:56 localhost kernel: [<c044b12d>] ? trace_hardirqs_on_caller+0x18/0x150
>>>> Apr 17 16:59:56 localhost kernel: [<c044b270>] ? trace_hardirqs_on+0xb/0xd
>>>> Apr 17 16:59:56 localhost kernel: [<c051c61a>] ? _raw_spin_lock+0x53/0xfa
>>>> Apr 17 16:59:56 localhost kernel: [<c051c89f>] __list_add+0x27/0x5c
>>>> Apr 17 16:59:56 localhost kernel: [<ef8f6daa>] locks_start_grace+0x22/0x30 [lockd]
>>>> Apr 17 16:59:56 localhost kernel: [<ef8f34da>] set_grace_period+0x39/0x53 [lockd]
>>>> Apr 17 16:59:56 localhost kernel: [<c06b8921>] ? lock_kernel+0x1c/0x28
>>>> Apr 17 16:59:56 localhost kernel: [<ef8f3558>] lockd+0x64/0x164 [lockd]
>>>> Apr 17 16:59:56 localhost kernel: [<c044b12d>] ? trace_hardirqs_on_caller+0x18/0x150
>>>> Apr 17 16:59:56 localhost kernel: [<c04227b0>] ? complete+0x34/0x3e
>>>> Apr 17 16:59:56 localhost kernel: [<ef8f34f4>] ? lockd+0x0/0x164 [lockd]
>>>> Apr 17 16:59:56 localhost kernel: [<ef8f34f4>] ? lockd+0x0/0x164 [lockd]
>>>> Apr 17 16:59:56 localhost kernel: [<c043dd42>] kthread+0x45/0x6b
>>>> Apr 17 16:59:56 localhost kernel: [<c043dcfd>] ? kthread+0x0/0x6b
>>>> Apr 17 16:59:56 localhost kernel: [<c0403c23>] kernel_thread_helper+0x7/0x10
>>>> Apr 17 16:59:56 localhost kernel: ---[ end trace fa484bd6d19ade8f ]---
>>>> Apr 17 16:59:56 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 17 16:59:56 localhost kernel: NFSD: starting 90-second grace period
>>>> Apr 17 17:02:50 localhost mountd[27209]: Caught signal 15, un-registering and exiting.
>>>> Apr 17 17:02:50 localhost kernel: nfsd: last server has exited, flushing export cache
>>>> Apr 17 17:02:51 localhost kernel: ------------[ cut here ]------------
>>>> Apr 17 17:02:51 localhost kernel: WARNING: at lib/list_debug.c:26 __list_add+0x27/0x5c()
>>>> Apr 17 17:02:51 localhost kernel: Hardware name: Presario M2000 (PT365PA#AB2)
>>>> Apr 17 17:02:51 localhost kernel: list_add corruption. next->prev should be prev (ef8fe958), but was ef8ff128. (next=ef8ff128).
>>>> Apr 17 17:02:51 localhost kernel: Modules linked in: fuse i915 drm i2c_algo_bit nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc ipv6 p4_clockmod dm_multipath uinput snd_intel8x0m snd_intel8x0 snd_seq_dummy snd_ac97_codec ac97_bus snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore 8139cp firewire_ohci firewire_core snd_page_alloc tifm_7xx1 i2c_i801 iTCO_wdt 8139too tifm_core i2c_core yenta_socket crc_itu_t iTCO_vendor_support pcspkr mii rsrc_nonstatic wmi video output ata_generic pata_acpi [last unloaded: microcode]
>>>> Apr 17 17:02:51 localhost kernel: Pid: 27349, comm: lockd Tainted: G W 2.6.30-rc2 #3
>>>> Apr 17 17:02:51 localhost kernel: Call Trace:
>>>> Apr 17 17:02:51 localhost kernel: [<c042d5b5>] warn_slowpath+0x71/0xa0
>>>> Apr 17 17:02:51 localhost kernel: [<c0422a96>] ? update_curr+0x11d/0x125
>>>> Apr 17 17:02:51 localhost kernel: [<c044b12d>] ? trace_hardirqs_on_caller+0x18/0x150
>>>> Apr 17 17:02:51 localhost kernel: [<c044b270>] ? trace_hardirqs_on+0xb/0xd
>>>> Apr 17 17:02:51 localhost kernel: [<c051c61a>] ? _raw_spin_lock+0x53/0xfa
>>>> Apr 17 17:02:51 localhost kernel: [<c051c89f>] __list_add+0x27/0x5c
>>>> Apr 17 17:02:51 localhost kernel: [<ef8f6daa>] locks_start_grace+0x22/0x30 [lockd]
>>>> Apr 17 17:02:51 localhost kernel: [<ef8f34da>] set_grace_period+0x39/0x53 [lockd]
>>>> Apr 17 17:02:51 localhost kernel: [<c06b8921>] ? lock_kernel+0x1c/0x28
>>>> Apr 17 17:02:51 localhost kernel: [<ef8f3558>] lockd+0x64/0x164 [lockd]
>>>> Apr 17 17:02:51 localhost kernel: [<c044b12d>] ? trace_hardirqs_on_caller+0x18/0x150
>>>> Apr 17 17:02:51 localhost kernel: [<c04227b0>] ? complete+0x34/0x3e
>>>> Apr 17 17:02:51 localhost kernel: [<ef8f34f4>] ? lockd+0x0/0x164 [lockd]
>>>> Apr 17 17:02:51 localhost kernel: [<ef8f34f4>] ? lockd+0x0/0x164 [lockd]
>>>> Apr 17 17:02:51 localhost kernel: [<c043dd42>] kthread+0x45/0x6b
>>>> Apr 17 17:02:51 localhost kernel: [<c043dcfd>] ? kthread+0x0/0x6b
>>>> Apr 17 17:02:51 localhost kernel: [<c0403c23>] kernel_thread_helper+0x7/0x10
>>>> Apr 17 17:02:51 localhost kernel: ---[ end trace fa484bd6d19ade90 ]---
>>>> Apr 17 17:02:51 localhost kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
>>>> Apr 17 17:02:51 localhost kernel: NFSD: starting 90-second grace period
>>>> Apr 17 17:08:09 localhost mountd[27361]: authenticated mount request from 10.167.141.101:695 for /tmp/nfs3 (/tmp/nfs3)
>>>>
>>>>> --b.
>>>>>
>>>>>>> --b.
>>>>>>>
>>>>>>> diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
>>>>>>> index abf8388..1a54ae1 100644
>>>>>>> --- a/fs/lockd/svc.c
>>>>>>> +++ b/fs/lockd/svc.c
>>>>>>> @@ -104,6 +104,16 @@ static void set_grace_period(void)
>>>>>>> schedule_delayed_work(&grace_period_end, grace_period);
>>>>>>> }
>>>>>>>
>>>>>>> +static void restart_grace(void)
>>>>>>> +{
>>>>>>> + if (nlmsvc_ops) {
>>>>>>> + cancel_delayed_work_sync(&grace_period_end);
>>>>>>> + locks_end_grace(&lockd_manager);
>>>>>>> + nlmsvc_invalidate_all();
>>>>>>> + set_grace_period();
>>>>>>> + }
>>>>>>> +}
>>>>>>> +
>>>>>>> /*
>>>>>>> * This is the lockd kernel thread
>>>>>>> */
>>>>>>> @@ -149,10 +159,7 @@ lockd(void *vrqstp)
>>>>>>>
>>>>>>> if (signalled()) {
>>>>>>> flush_signals(current);
>>>>>>> - if (nlmsvc_ops) {
>>>>>>> - nlmsvc_invalidate_all();
>>>>>>> - set_grace_period();
>>>>>>> - }
>>>>>>> + restart_grace();
>>>>>>> continue;
>>>>>>> }
>>>>>>>
>>>>>>>
--
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