John Baldwin wrote: > On Tuesday, October 02, 2012 2:19:35 pm Norbert Aschendorff wrote: > > Well... > > > > Here the results for a kernel without WITNESS_SKIPSPIN (I'll compile > > one > > including that tomorrow, but until then...) > > > > Good news is: The kernel crashed with activated WITNESS. > > Bad news is: I have to turn power off after the crash with WITNESS. > > The > > crash dump is _not_ written to disk :( > > > > Good news II is: It wrote something to the syslog. Actually, it > > wrote > > very much to the syslog, some megabytes in total. Most of it is the > > same, here the latest messages logfile: > > http://lbo.spheniscida.de/Files/nfs-crash.log (94K) > > > > It specifies the file, line and zone. Maybe it's useful... > > That does help. It tells us that the lock being held is a vnode > interlock > that was last acquired in vinactive(). > > I don't see how though, unless the lock was recursively acquired > elsewhere. > Yep, it looks like every call to vinactive() is followed by a VI_UNLOCK(). Also, when v_interlock gets mtx_init()'d, it only gets MTX_DEF, so I think there would be a panic() if VI_LOCK(vp) was done recursively?
I've added kib@ to the cc list, in case he has some insight into this? (Kostik, Norbert gets a panic() after "Sleeping thread (tid nn, pid mm) owns a non-sleepable lock" happens in propagate_priority() called from cv_timedwait_sig() in the server side krpc by a kernel nfsd thread.) rick > You could try adding a different WITNESS check (using WITNESS_WARN) to > see > which NFS proc returns with a lock held so you can catch this when it > first > occurs rather than much later after the fact. Do you have the start of > the > log messages? > > -- > John Baldwin > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to > "freebsd-stable-unsubscr...@freebsd.org" _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
