I built an etch s390 kernel with some options that I find useful;
CIFS support is chief among them, with DIAG support close behind (I
also re-added tape support, because I find it useful). It's really
intended for use in a VM environment, and if anyone wants it, add the
following to sources.list:
deb http://debian390-repository.sinenomine.net/ ./
The signing key is F8B151AC
and the key is available from pgp.mit.edu. The usual set of packages
created with make-kpkg are up on that repository. There are no
source changes from vanilla Etch, just compilation options.
I haven't done a real patch to the sysconfig tools, but I added the
following to /etc/sysconfig/hwup-dasd
if test "$USE_DIAG" -eq "1" ; then
echo 1 > $SYSFS$DEVPATH/use_diag
fi
(just before the online)
And then, of course, /etc/sysconfig/hardware/ccw-0.0.0151 (my DASD
VDISK) now contains
USE_DIAG=1
This *should* speed performance of swap-on-VDISK, but I confess that
I have not actually benchmarked it at all.
(I've also done a patch to hwup-ccw to not reject tape out of hand,
but since in my environment I typically pass the tape device around
between guests rather than having it available at boot I haven't
tested it yet. 3480/90 support works fine with my emulated 3490, in
that I can read and write tar files to the /dev/ntibm0 device)
Adam
