Changing default module options

[Stanislaw Gruszka]

On Sun, Mar 21, 2010 at 04:11:53AM -0400, Jon Masters wrote:
> On Fri, 2010-03-19 at 12:47 -0400, Bill Nottingham wrote:
> > Stanislaw Gruszka (sgruszka at redhat.com) said: 
> > > I would like to change default iwlagn/iwl3945 options (swcrypto50=1
> > > swcrypto=1) to solve two nasty iwlwifi firmware bugs.
> > > 
> > > What is preferred way to do this by changing /etc/modprobe.d/
> > > or by patching kernel?
> > 
> > If it's a temporary workaround, probably /etc/modprobe.d. If it's
> > the way forward, just change the kernel (upstream!).
> 
> Let us know what you need to be doing please.

Using software encryption is workaround for firmware malfunction. We
have two Fedora bug reports:
https://bugzilla.redhat.com/show_bug.cgi?id=519154
https://bugzilla.redhat.com/show_bug.cgi?id=556990
with many users affected. Many upstream users suffers from that problem 
as well.

Since this is firmware bug this should be fixed in firmware. Intel
is aware of issue but we do not have F/W solution for that for long 
time.

Changing default options in upstream kernel is problematic. Since 2.6.33
we have different memory allocations to avoid failures due to buddy
allocator fragmentation. It is optimized for normal usage case, but with
swcrypto when and skb's have to be linearized memory usage by driver
increase about 2 times.

So I would like to swcrypto options to fedora, and work for
better solution upstream (or rather hope Intel will solve that).

Stanislaw