[OpenAFS] 1.8.x afs_inode_cache more slab usage

[Stephan Wiesand]

Hello,

> On 3. Sep 2020, at 15:53, Chad William Seys <cwseys@physics.wisc.edu> =
wrote:
>=20
> Hello all,
>  It seems that OpenAFS 1.8.x uses more slab (or doesn't free it as =
quickly) than 1.6.20 .
>=20
>  The machine in question uses AFS heavily. it is used to backup our =
AFS area. It scans through files constantly and in more than directory =
and in two domains at a time.
>  I recently upgraded from Debian Stretch running openafs 1.6.20 to =
Debian Buster 1.8.2.  After encountering the problem I also tried Debian =
Bullseye (testing) with openafs 1.8.6.  Same symptoms.
>  On a 6GB (virtual) machine it used enough to start swapping and kill =
the machine.

while that's not supposed to happen, I'm wondering whether running afsd =
with '-disable-dynamic-vcaches' would help?

- Stephan

>  The last output of 'slabtop' says:
> OBJS ACTIVE USE OBJSIZE SLABS OBJ/SLAB CACHE SIZE NAME
> 5235885 5235885 100% 1.06K 539811 15 8636976K afs_inode_cache
>=20
>  Any way to change this behavior?
>=20
> Thanks!
> Cahd.

--=20
Stephan Wiesand
DESY -DV-
Platanenallee 6
15738 Zeuthen, Germany