BUG: warning at fs/inotify.c:181 with linux-2.6.18

BUG: warning at fs/inotify.c:181 with linux-2.6.18

[C.Y.M]

Since I updated to 2.6.18, I have had the following warnings in my syslog.  Is
this a known problem? Better yet, is there a solution to this?  I am running on
a i686 (Athlon XP) 32 bit cpu compiled under gcc-3.4.6.


Oct  5 08:27:31 sid kernel: BUG: warning at
fs/inotify.c:181/set_dentry_child_flags()
Oct  5 08:27:31 sid kernel:  [<c0182a10>] set_dentry_child_flags+0x170/0x190
Oct  5 08:27:31 sid kernel:  [<c0182adf>] remove_watch_no_event+0x5f/0x70
Oct  5 08:27:31 sid kernel:  [<c0182b08>] inotify_remove_watch_locked+0x18/0x50
Oct  5 08:27:31 sid kernel:  [<c01833dc>] inotify_rm_wd+0x6c/0xb0
Oct  5 08:27:31 sid kernel:  [<c0183e98>] sys_inotify_rm_watch+0x38/0x60
Oct  5 08:27:31 sid kernel:  [<c0102d8f>] syscall_call+0x7/0xb


Best Regards.

Re: BUG: warning at fs/inotify.c:181 with linux-2.6.18

[Nick Piggin]

C.Y.M wrote:
> Since I updated to 2.6.18, I have had the following warnings in my syslog.  Is
> this a known problem? Better yet, is there a solution to this?  I am running on
> a i686 (Athlon XP) 32 bit cpu compiled under gcc-3.4.6.
> 
> 
> Oct  5 08:27:31 sid kernel: BUG: warning at
> fs/inotify.c:181/set_dentry_child_flags()
> Oct  5 08:27:31 sid kernel:  [<c0182a10>] set_dentry_child_flags+0x170/0x190
> Oct  5 08:27:31 sid kernel:  [<c0182adf>] remove_watch_no_event+0x5f/0x70
> Oct  5 08:27:31 sid kernel:  [<c0182b08>] inotify_remove_watch_locked+0x18/0x50
> Oct  5 08:27:31 sid kernel:  [<c01833dc>] inotify_rm_wd+0x6c/0xb0
> Oct  5 08:27:31 sid kernel:  [<c0183e98>] sys_inotify_rm_watch+0x38/0x60
> Oct  5 08:27:31 sid kernel:  [<c0102d8f>] syscall_call+0x7/0xb

I don't think it is a known problem. Is it reproduceable? Any idea what
is making the inotify syscalls?

-- 
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com 

Re: BUG: warning at fs/inotify.c:181 with linux-2.6.18

[C.Y.M]

Nick Piggin wrote:
> C.Y.M wrote:
>> Since I updated to 2.6.18, I have had the following warnings in my
>> syslog.  Is
>> this a known problem? Better yet, is there a solution to this?  I am
>> running on
>> a i686 (Athlon XP) 32 bit cpu compiled under gcc-3.4.6.
>>
>>
>> Oct  5 08:27:31 sid kernel: BUG: warning at
>> fs/inotify.c:181/set_dentry_child_flags()
>> Oct  5 08:27:31 sid kernel:  [<c0182a10>]
>> set_dentry_child_flags+0x170/0x190
>> Oct  5 08:27:31 sid kernel:  [<c0182adf>] remove_watch_no_event+0x5f/0x70
>> Oct  5 08:27:31 sid kernel:  [<c0182b08>]
>> inotify_remove_watch_locked+0x18/0x50
>> Oct  5 08:27:31 sid kernel:  [<c01833dc>] inotify_rm_wd+0x6c/0xb0
>> Oct  5 08:27:31 sid kernel:  [<c0183e98>] sys_inotify_rm_watch+0x38/0x60
>> Oct  5 08:27:31 sid kernel:  [<c0102d8f>] syscall_call+0x7/0xb
> 
> I don't think it is a known problem. Is it reproduceable? Any idea what
> is making the inotify syscalls?
> 

The warning messages start about an hour or two after I boot into the 2.6.18
kernel.  I am not doing anything on the machine when it happens.  I don't see
any new processes starting up at that time either.  As soon as I boot back to
2.6.17.13, there are no more problems.  Also, the machine is not running X when
it occurs.

root@sid:~$ grep BUG /var/log/syslog
Oct  5 08:27:31 sid kernel: BUG: warning at
fs/inotify.c:181/set_dentry_child_flags()
Oct  5 11:46:36 sid kernel: BUG: warning at
fs/inotify.c:181/set_dentry_child_flags()
Oct  5 13:24:50 sid kernel: BUG: warning at
fs/inotify.c:181/set_dentry_child_flags()
Oct  5 15:17:55 sid kernel: BUG: warning at
fs/inotify.c:181/set_dentry_child_flags()
Oct  5 16:40:10 sid kernel: BUG: warning at
fs/inotify.c:181/set_dentry_child_flags()


Best Regards.

Re: BUG: warning at fs/inotify.c:181 with linux-2.6.18

[C.Y.M]

C.Y.M wrote:
> Nick Piggin wrote:
>> C.Y.M wrote:
>>> Since I updated to 2.6.18, I have had the following warnings in my
>>> syslog.  Is
>>> this a known problem? Better yet, is there a solution to this?  I am
>>> running on
>>> a i686 (Athlon XP) 32 bit cpu compiled under gcc-3.4.6.
>>>
>>>
>>> Oct  5 08:27:31 sid kernel: BUG: warning at
>>> fs/inotify.c:181/set_dentry_child_flags()
>>> Oct  5 08:27:31 sid kernel:  [<c0182a10>]
>>> set_dentry_child_flags+0x170/0x190
>>> Oct  5 08:27:31 sid kernel:  [<c0182adf>] remove_watch_no_event+0x5f/0x70
>>> Oct  5 08:27:31 sid kernel:  [<c0182b08>]
>>> inotify_remove_watch_locked+0x18/0x50
>>> Oct  5 08:27:31 sid kernel:  [<c01833dc>] inotify_rm_wd+0x6c/0xb0
>>> Oct  5 08:27:31 sid kernel:  [<c0183e98>] sys_inotify_rm_watch+0x38/0x60
>>> Oct  5 08:27:31 sid kernel:  [<c0102d8f>] syscall_call+0x7/0xb
>> I don't think it is a known problem. Is it reproduceable? Any idea what
>> is making the inotify syscalls?
>>
> 
> The warning messages start about an hour or two after I boot into the 2.6.18
> kernel.  I am not doing anything on the machine when it happens.  I don't see
> any new processes starting up at that time either.  As soon as I boot back to
> 2.6.17.13, there are no more problems.  Also, the machine is not running X when
> it occurs.
> 
> root@sid:~$ grep BUG /var/log/syslog
> Oct  5 08:27:31 sid kernel: BUG: warning at
> fs/inotify.c:181/set_dentry_child_flags()
> Oct  5 11:46:36 sid kernel: BUG: warning at
> fs/inotify.c:181/set_dentry_child_flags()
> Oct  5 13:24:50 sid kernel: BUG: warning at
> fs/inotify.c:181/set_dentry_child_flags()
> Oct  5 15:17:55 sid kernel: BUG: warning at
> fs/inotify.c:181/set_dentry_child_flags()
> Oct  5 16:40:10 sid kernel: BUG: warning at
> fs/inotify.c:181/set_dentry_child_flags()
> 

This bug just happened again with 2.6.18.1.  Has anyone else noticed this in
their logs?  I would really like to make that error go away. Any Ideas?  I do
not see anything that would cause this to happen.

Best Regards.

Re: BUG: warning at fs/inotify.c:181 with linux-2.6.18

[Michal Piotrowski]

On 06/10/06, Nick Piggin <nickpiggin@yahoo.com.au> wrote:
> C.Y.M wrote:
> > Since I updated to 2.6.18, I have had the following warnings in my syslog.  Is
> > this a known problem? Better yet, is there a solution to this?  I am running on
> > a i686 (Athlon XP) 32 bit cpu compiled under gcc-3.4.6.
> >
> >
> > Oct  5 08:27:31 sid kernel: BUG: warning at
> > fs/inotify.c:181/set_dentry_child_flags()
> > Oct  5 08:27:31 sid kernel:  [<c0182a10>] set_dentry_child_flags+0x170/0x190
> > Oct  5 08:27:31 sid kernel:  [<c0182adf>] remove_watch_no_event+0x5f/0x70
> > Oct  5 08:27:31 sid kernel:  [<c0182b08>] inotify_remove_watch_locked+0x18/0x50
> > Oct  5 08:27:31 sid kernel:  [<c01833dc>] inotify_rm_wd+0x6c/0xb0
> > Oct  5 08:27:31 sid kernel:  [<c0183e98>] sys_inotify_rm_watch+0x38/0x60
> > Oct  5 08:27:31 sid kernel:  [<c0102d8f>] syscall_call+0x7/0xb
>
> I don't think it is a known problem. Is it reproduceable?

It is a known problem.
http://www.ussg.iu.edu/hypermail/linux/kernel/0608.1/1209.html

> Any idea what
> is making the inotify syscalls?
>
> --
> SUSE Labs, Novell Inc.

Regards,
Michal

-- 
Michal K. K. Piotrowski
LTG - Linux Testers Group
(http://www.stardust.webpages.pl/ltg/)

Re: BUG: warning at fs/inotify.c:181 with linux-2.6.18

[C.Y.M]

Michal Piotrowski wrote:
> On 06/10/06, Nick Piggin <nickpiggin@yahoo.com.au> wrote:
>> C.Y.M wrote:
>> > Since I updated to 2.6.18, I have had the following warnings in my
>> syslog.  Is
>> > this a known problem? Better yet, is there a solution to this?  I am
>> running on
>> > a i686 (Athlon XP) 32 bit cpu compiled under gcc-3.4.6.
>> >
>> >
>> > Oct  5 08:27:31 sid kernel: BUG: warning at
>> > fs/inotify.c:181/set_dentry_child_flags()
>> > Oct  5 08:27:31 sid kernel:  [<c0182a10>]
>> set_dentry_child_flags+0x170/0x190
>> > Oct  5 08:27:31 sid kernel:  [<c0182adf>]
>> remove_watch_no_event+0x5f/0x70
>> > Oct  5 08:27:31 sid kernel:  [<c0182b08>]
>> inotify_remove_watch_locked+0x18/0x50
>> > Oct  5 08:27:31 sid kernel:  [<c01833dc>] inotify_rm_wd+0x6c/0xb0
>> > Oct  5 08:27:31 sid kernel:  [<c0183e98>]
>> sys_inotify_rm_watch+0x38/0x60
>> > Oct  5 08:27:31 sid kernel:  [<c0102d8f>] syscall_call+0x7/0xb
>>
>> I don't think it is a known problem. Is it reproduceable?
> 
> It is a known problem.
> http://www.ussg.iu.edu/hypermail/linux/kernel/0608.1/1209.html
> 

Thank you for the confirmation.  Please include me in this thread if someone
finds the answer. This bug seems to occur very frequently on my machine with
2.6.18.1 so I have been forced to revert back to 2.6.17.13 until I can fix it.

Best Regards.

Re: BUG: warning at fs/inotify.c:181 with linux-2.6.18

[Nick Piggin]

C.Y.M wrote:
> Michal Piotrowski wrote:
> 
>>On 06/10/06, Nick Piggin <nickpiggin@yahoo.com.au> wrote:
>>
>>>C.Y.M wrote:
>>>
>>>>Since I updated to 2.6.18, I have had the following warnings in my
>>>
>>>syslog.  Is
>>>
>>>>this a known problem? Better yet, is there a solution to this?  I am
>>>
>>>running on
>>>
>>>>a i686 (Athlon XP) 32 bit cpu compiled under gcc-3.4.6.
>>>>
>>>>
>>>>Oct  5 08:27:31 sid kernel: BUG: warning at
>>>>fs/inotify.c:181/set_dentry_child_flags()
>>>>Oct  5 08:27:31 sid kernel:  [<c0182a10>]
>>>
>>>set_dentry_child_flags+0x170/0x190
>>>
>>>>Oct  5 08:27:31 sid kernel:  [<c0182adf>]
>>>
>>>remove_watch_no_event+0x5f/0x70
>>>
>>>>Oct  5 08:27:31 sid kernel:  [<c0182b08>]
>>>
>>>inotify_remove_watch_locked+0x18/0x50
>>>
>>>>Oct  5 08:27:31 sid kernel:  [<c01833dc>] inotify_rm_wd+0x6c/0xb0
>>>>Oct  5 08:27:31 sid kernel:  [<c0183e98>]
>>>
>>>sys_inotify_rm_watch+0x38/0x60
>>>
>>>>Oct  5 08:27:31 sid kernel:  [<c0102d8f>] syscall_call+0x7/0xb
>>>
>>>I don't think it is a known problem. Is it reproduceable?
>>
>>It is a known problem.
>>http://www.ussg.iu.edu/hypermail/linux/kernel/0608.1/1209.html
>>
> 
> 
> Thank you for the confirmation.  Please include me in this thread if someone
> finds the answer. This bug seems to occur very frequently on my machine with
> 2.6.18.1 so I have been forced to revert back to 2.6.17.13 until I can fix it.

I haven't got around to looking at it yet, sorry.

It does seem like my inotify scalability patch is involved, however it is
interesting that you cannot reproduce the problem in 2.6.17.13.

I probably won't get around to having a look at it for a while, but if you
would like to speed up the process you could try running a git bisect to
find which patch is making the error trigger for you.

-- 
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com 

Re: BUG: warning at fs/inotify.c:181 with linux-2.6.18

[C.Y.M]

>>
>> Thank you for the confirmation.  Please include me in this thread if
>> someone
>> finds the answer. This bug seems to occur very frequently on my
>> machine with
>> 2.6.18.1 so I have been forced to revert back to 2.6.17.13 until I can
>> fix it.
> 
> I haven't got around to looking at it yet, sorry.
> 
> It does seem like my inotify scalability patch is involved, however it is
> interesting that you cannot reproduce the problem in 2.6.17.13.
> 
> I probably won't get around to having a look at it for a while, but if you
> would like to speed up the process you could try running a git bisect to
> find which patch is making the error trigger for you.
> 

I finally got around to try 2.6.18.2 and I still seem to have this problem.  Has
anyone had a chance to make a patch for this yet?

Best Regards.