Possible problem with gamin

[Joe Marcus Clarke]

On Sat, 2008-04-19 at 15:23 +0200, Markus Brueffer wrote:
> Am Samstag, 19. April 2008 08:03:27 schrieb Joe Marcus Clarke:
> > On Tue, 2008-04-15 at 17:25 +0200, Markus Brueffer wrote:
> > > Hi,
> > >
> > > I'm currently hunting down a problem in KDE4 where kded4 (some sort of
> > > super daemon) hangs when shutting down KDE4. kded4 has a plugin for file
> > > monitoring using the FAM API.
> > >
> > > If I replace gamin with fam, the shutdown works fine, so I'm suspecting a
> > > problem with gamin.
> > >
> > > Attaching to the hanging kded4 process shows this (full backtrace with
> > > further debugging data is attached):

Can you get a ktrace of both processes when this problem occurs?

Joe

> > >
> > > [Switching to Thread 0x8103100 (LWP 100101)]
> > > 0x29976e61 in write () from /lib/libc.so.7
> > > (gdb) bt
> > > #0  0x29976e61 in write () from /lib/libc.so.7
> > > #1  0x28fa3152 in write () from /lib/libthr.so.3
> > > #2  0x2977a1f1 in gamin_write_byte (fd=13, data=0xbfbfd69a "\n", len=10)
> > > at gam_api.c:535
> > > #3  0x2977a4b9 in gamin_send_request (type=GAM_REQ_CANCEL, fd=13,
> > > filename=0x0, fr=0x8254730, userData=0x0, data=0x811d800, has_reqnum=0)
> > > at gam_api.c:629
> > > #4  0x2977bc6d in FAMCancelMonitor (fc=0x817acb0, fr=0x8254730) at
> > > gam_api.c:1413
> > > #5  0x281aaca0 in KDirWatchPrivate::removeEntry (this=0x817ac50,
> > > instance=0x81bab60, e=0x8254704, sub_entry=0x0)
> > > at /usr/ports/x11/kdelibs4/work/kdelibs-4.0.3/kio/kio/kdirwatch.cpp:797
> > > #6  0x281a9976 in KDirWatchPrivate::removeEntry (this=0x817ac50,
> > > instance=0x81bab60, _path=@0x834beec, sub_entry=0x0)
> > > at /usr/ports/x11/kdelibs4/work/kdelibs-4.0.3/kio/kio/kdirwatch.cpp:771
> > > #7  0x281a9d56 in KDirWatchPrivate::removeEntries (this=0x817ac50,
> > > instance=0x81bab60)
> > > at /usr/ports/x11/kdelibs4/work/kdelibs-4.0.3/kio/kio/kdirwatch.cpp:873
> > > #8  0x281aa017 in ~KDirWatch (this=0x81bab60)
> > > at /usr/ports/x11/kdelibs4/work/kdelibs-4.0.3/kio/kio/kdirwatch.cpp:1520
> > > [...]
> > >
> > > top(1) shows that both gam_server and kded4 are in 'sbwait' state.
> > >
> > > This is on RELENG_7 (i386) with gamin-0.1.9_1. Switching between polling
> > > and kqueue support doesn't make a difference.
> >
> > It would be good to see the backtrace from all gam_server threads to get
> > an idea what gam_server is doing.  kded4 has written data to the
> > gam_server socket, and it is blocking until the data is drained.
> 
> Thanks for looking into this. The bt is attached along with matching debug 
> info for kded4.
> 
> I'll leave the system running in this state in case you need more data.
> 
> Thanks,
> 
> Markus
-- 
PGP Key : http://www.marcuscom.com/pgp.asc
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