[OpenAFS] PAG garbage collection on linux

[Russ Allbery]

Andy Cobaugh <phalenor@gmail.com> writes:

> I recently ran into a situation where I had a process on linux that gets
> pags probably 10 times per minute on linux (dovecot, fwiw). After 3
> weeks of uptime after upgrading afs to 1.4.7, we had to reboot the
> machine, as we were no longer able to create new pags.
>
> This is on debian stable, kernel 2.6.18-6-amd64, and afs 1.4.7 as
> previously mentioned.
>
> /proc/sys/afs/GCPAGS gets set to 8, which from my understanding means it
> was unable to walk the process tree.
>
> I see that it works with 1.4.7 on fedora 9 with a 2.6.25 kernel.

I've had this problem for some time, and I don't know what causes it.  As
near as I can tell, the process tree walk is not working properly with
Debian kernels.  I get the same behavior with 1.4.7 on a 2.6.25 Debian
kernel.

-- 
Russ Allbery (rra@stanford.edu)             <http://www.eyrie.org/~eagle/>