Hi John, On Wed, 7 Oct 2015, John Baldwin wrote:
mtx_lock = 1444181401}Ok, so that is a destroyed mutex. This means it is probably not Giant, and it might be some mutex in smb_iod_main() that shows up in smb_iod_thread() due to inlining. Actually, we know this from your earlier mail: if (evp->ev_type & SMBIOD_EV_SYNC) { SMB_IOD_EVLOCK(iod); wakeup(evp); SMB_IOD_EVUNLOCK(iod); Line 624 is that SMB_IOD_EVUNLOCK(). Hmm, does 'p *evp' work at frame 10? If not, can you try building the devel/gdb port from a recent ports tree with the 'KGDB' option enabled and use 'kgdb710' instead of 'kgdb' to see if you can print out '*evp'?
kgdb hangs when chaning to frame10. I will build the port later (svn ports checkout in progress) I have cloned the VM so that I have this isolated from my production network.
(kgdb) --snipp-- I can build a GENERIC kernel with INVARIANTS enabled on the box to see if we get a better assertions next time this happens.That would be great, but please keep the existing core and kernel. We might be able to figure this out from that still. Also, go ahead and put this patch in and let me know if you ever see the printf logged. If you do, that could explain this panic (and we might need a more involved fix to avoid memory leaks). Index: smb_iod.c =================================================================== --- smb_iod.c (revision 288952) +++ smb_iod.c (working copy) @@ -624,6 +624,13 @@ SMB_IOD_EVUNLOCK(iod); } else free(evp, M_SMBIOD); + if (iod->iod_flags & SMBIOD_SHUTDOWN) { + if (!STAILQ_EMPTY(&iod->iod_evlist)) + printf("%s: shutdown with pending events\n", + __func__); + } + return; + } } #if 0 if (iod->iod_state == SMBIOD_ST_VCACTIVE) {
The vm is now runnning lates 10-stable kernel with above patch and invariants enabled. Give it about 2 days to produce the next crash. Greetings Christian -- Christian Kratzer CK Software GmbH Email: c...@cksoft.de Wildberger Weg 24/2 Phone: +49 7032 893 997 - 0 D-71126 Gaeufelden Fax: +49 7032 893 997 - 9 HRB 245288, Amtsgericht Stuttgart Mobile: +49 171 1947 843 Geschaeftsfuehrer: Christian Kratzer Web: http://www.cksoft.de/ _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
