[OpenAFS] Storebehind / asyncronous writes doesn't work

[Raimo Koski]

I am using openafs-*-1.4.7-68.SL5 (Scientific Linux 5.2) on i386,
everything else seems to work.
Client is started with: /usr/vice/etc/afsd -stat 40000 -dcache 40000
-daemons 10 -volumes 25 -files 200000 -verbose -afsdb -dynroot -fakestat
Cache settings:
fs st -v
Default store asynchrony is 1611393 kbytes.
fs getcacheparms
AFS using 330841 of the cache's available 100000000 1K byte blocks.

The link between server and client is nominally 24/2Mbps ADSL, actual
about 22/1.2Mbps, so writes are only about 120 KB/s and if the write cache
would work, it would make a big difference.

Read cache works, seeing hard disk speed type of performance.

So, how to get it working?