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

[Nick Piggin <nickpiggin@yahoo.com.au>]

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.
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