CC'ing to jeffr On Sat, Apr 16, 2005 at 07:21:29AM +1000, Peter Jeremy wrote: > My son's computer deadlocked last night. "show lockedvnods" in DDB showed: > > Locked vnodes > 0xc1669840: tag ufs, type VDIR, usecount 8, writecount 0, refcount 2, flags > (VV_ROOT|VV_OBJBUF), lock type ufs: EXCL (count 1) by thread 0xc18ed000 (pid > 9666) with 7 pending > ino 2, on dev ad0s1g (4, 25) > 0xc1682000: tag ufs, type VDIR, usecount 5, writecount 0, refcount 2, flags > (VV_OBJBUF), lock type ufs: EXCL (count 1) by thread 0xc16fd000 (pid 15686) > with 1 pending > ino 23552, on dev ad0s1g (4, 25) > 0xc1b30d68: tag ufs, type VDIR, usecount 2, writecount 0, refcount 1, flags > (VV_OBJBUF), lock type ufs: EXCL (count 1) by thread 0xc268f000 (pid 9075) > with 1 pending > ino 122986, on dev ad0s1g (4, 25) > 0xc1c3c210: tag ufs, type VDIR, usecount 3, writecount 0, refcount 1, flags > (VV_OBJBUF), lock type ufs: EXCL (count 1) by thread 0xc16fe4b0 (pid 9067) > with 1 pending > ino 142022, on dev ad0s1g (4, 25) > 0xc1e2ce70: tag ufs, type VREG, usecount 6, writecount 0, refcount 0, flags > (VV_OBJBUF), lock type ufs: SHARED (count 1) with 1 pending > ino 142169, on dev ad0s1g (4, 25) > > After poking around in the crashdump for a while, I've worked out that > the process holding each of the above exclusive locks is waiting on > the next lock in the list. Unfortunately, there doesn't appear to be > any way to work out which process is holding the shared lock unless > DEBUG_LOCKS is set (and even this doesn't work if the lock was implicitly > downgraded by a process calling lockmgr(LK_SHARED) when it holds an > exclusive lock). > > FWIW, the affected inodes are: > 2 /usr > 23552 /usr/local > 122986 /usr/local/OpenOffice.org1.1.4 > 142022 /usr/local/OpenOffice.org1.1.4/program > 142169 /usr/local/OpenOffice.org1.1.4/program/libpsp645fi.so > > Does anyone have any ideas on how to track this further (or so I just > write it off as a glitch). > > -- > Peter Jeremy > _______________________________________________ > [email protected] mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "[EMAIL PROTECTED]" >
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