On 8/20/13, J David <j.david.li...@gmail.com> wrote: > On Thu, Aug 15, 2013 at 5:39 PM, Rick Macklem <rmack...@uoguelph.ca> wrote: >> Have you been able to pass the debugging info on to Kostik? >> >> It would be really nice to get this fixed for FreeBSD9.2. > > You're probably not talking to me, but headway here is slow. At our > location, we have been continuing to test releng/9.2 extensively, but > with r250907 reverted. Since reverting it solves the issue, and since > there haven't been any further changes to releng/9.2 that might also > resolve this issue, re-applying r250907 is perceived here as un-fixing > a problem. Enthusiasm for doing so is correspondingly low, even if > the purpose is to gather debugging info. :( > > However, after finally having clearance to test releng/9.2 r254540 > with r250907 included and with DDB on five nodes. The problem cropped > up in about an hour. Two threads in one process deadlocked, was > perfect. Got it into DDB and saw the stack trace was scrolling off so > there was no way to copy it by hand. Also, the machine's disk is > smaller than physical RAM, so no dump file. :( > > Here's what is available so far: > > db> show proc 33362 > > Process 33362 (httpd) at 0xcd225b50: > > state: NORMAL > > uid: 25000 gids: 25000 > > parent: pid 25104 at 0xc95f92d4 > > ABI: FreeBSD ELF32 > > arguments: /usr/local/libexec/httpd > > threads: 3 > > 100405 D newnfs 0xc9b875e4 httpd > > 100393 D pgrbwt 0xc43a30c0 httpd > > 100755 S uwait 0xc84b7c80 httpd > > > Not much to go on. :( Maybe these five can be configured with serial > consoles.
try this with serial console: host # script debug-output-file host # cu -s 9600 -l /dev/ttyU0 ~^B KDB: enter: Break to debugger [ thread pid 11 tid 100005 ] Stopped at kdb_alt_break_internal+0x17f: movq $0,kdb_why db> show msgbuf ... ~. ^D > > So, inquiries are continuing, but the answer to "does this still > happen on 9.2-RC2?" is definitely yes. > > Thanks! > _______________________________________________ > 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"
