[OpenAFS] Linux kernel panic, OpenAFS client, gconf

[Derrick J Brashear]

On Thu, 17 Jun 2004, Jan-Marc Pilawa wrote:

> Hello *,
>
> I read some threads about this problem in the archives, but till now I have no
> clue how to solve the frequent client crashes on SMP-systems. The problem is
> always triggered by gconfd-2 (At least the problem was only one time
> triggered by another application (mozilla)).
>
> I upgraded from openafs-1.2.10 to 1.2.11 (on SuSE 9.0, Kernel 2.4.21-xxx) and
> applied a patch from Chas Williams for osi_vnodeops.c, but it is almost the
> same. The Situation is improved sofar that in some cases afsd seems to hang
> and the applications produce very high load, because they can't access afs.
>
> In most cases the systems produce oopses like the following one (here the
> output from ksymoops of the kernel panic):

> TT3<1>Unable to handle kernel paging request at virtual address ffffffff

means you got a vcache entry with no (zero) refcount.

i assume it's not easily reproducible? if there were a way to repeat it i
could probably crush this.