1.2.9 unstable ? (was [OpenAFS] inaccessibble volume - please help)

[Derek Atkins]

Be careful which kernel you're testing on...  I would recommend
you test against a variety of problem.  About this time last year
I was working with Gerry on this exact same issue and noticed that
the signal behavior was different on a few different Linux kernels.
Finding something that works on ALL of them was problematic (and clearly
we didn't get all the corner cases handled).

-derek

Derrick J Brashear <shadow@dementia.org> writes:

> On Thu, 8 May 2003, Derrick J Brashear wrote:
> 
> > > I'll let you know...  I'm building a box to do some testing right now.
> > > We backed out 1.2.9 for Red Hat 7.3 boxes once this problem was
> > > discovered.  Because we autoreboot our Red Hat boxes, it frequently
> > > happens that folks leave processes running that are accessing AFS.  So
> > > the shutdown problem shows itself pretty well here...  (Older versions
> > > of AFS/OpenAFS used to have similar problems.)
> >
> > If you can reproduce it, you might try this:
> > /afs/andrew.cmu.edu/usr16/shadow/umount.diff
> 
> While it seems to fix it for the wrong reason, I believe I found the
> correct fix, and it's been applied as
> STABLE12-linux-rx-listener-flush-signals-20030605
> 
> I can tell you that the problem was that if e.g. /etc/init.d/halt ran
> before afsd was shut down, a kill -15 and a kill -9 of the listener pid
> happened. It was these that tripped up the shutdown.
> 
> If anyone wants to play with this a bit, apply the aforementioned delta to
> 1.2.9, arrange for a file in /afs to be busy, and try shutting down.
> 
> The 1.2.10 release candidates shouldn't have the problem for other reasons
> but I prefer to know we fixed the underlying bug, and it appears form my
> testing that this does so.
> 
> 
> 
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-- 
       Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
       Member, MIT Student Information Processing Board  (SIPB)
       URL: http://web.mit.edu/warlord/    PP-ASEL-IA     N1NWH
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