sx_sleep not waking up when timo expires

[John-Mark Gurney]

Ian Lepore wrote this message on Sun, Jul 29, 2018 at 08:35 -0600:
> On Sat, 2018-07-28 at 18:01 -0700, John-Mark Gurney wrote:
> > I recently upgraded my router to an Pine A64-LTS board, and have hit
> > the same issue as PR 222126[1].  The solution at the end does not work
> > for me, as I do not have that line in my loader.conf:
> > kern.timecounter.smp_tsc_adjust=1
> > 
> > I have verified that the wake up does not happen, as I used a dtrace
> > script to verify that pf_purge_expired_states is called or not called..
> > When I change the timeout, pf will kick the thread and get things
> > running again, but it has stopped a couple times later...
> > 
> > I'm running a recent SNAPSHOT:
> > FreeBSD gate2.funkthat.com 12.0-CURRENT FreeBSD 12.0-CURRENT #0 r336134: Mon Jul  9 19:20:11 UTC 2018     root at releng3.nyi.freebsd.org:/usr/obj/usr/src/arm64.aarch64/sys/GENERIC  arm64
> > 
> > This is likely reproducable by just starting pf, even in a pass all
> > mode, and watching for when the function stops getting called...  I'll
> > see if I can't get an extermely minimal config to reproduce it.
> > 
> > Any suggestions?
> > 
> > [1] https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222126
> > 
> 
> Sounds like
> 
>  https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=229644 
> 
> which has some patches attached which reduce but don't quite eliminate
> the occurrances, so nothing has been committed yet. I just ordered a
> SOPINE board so I can do some hands-on debugging.

Hmm... The interesting part is that I haven't seen ANY timer stability
issues though...  ntpd is still running w/o troubles... Only ntpd
logs I have are leap second file related:
Jul 28 22:36:56 gate2 ntpd[869]: leapsecond file ('/var/db/ntpd.leap-seconds.list'): expired less than 214 days ago

-- 
  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."