Re: [PATCH 2/2] mac80211: Initialize IBSS basic rates according to band

[Bruno Randolf <br1@einfach.org>]

On Tuesday 13 April 2010 16:21:15 Johannes Berg wrote:
> On Tue, 2010-04-13 at 09:16 +0900, Bruno Randolf wrote:
> > On Monday 12 April 2010 17:40:52 you wrote:
> > > On Mon, 2010-04-12 at 17:34 +0900, Bruno Randolf wrote:
> > > > before we unconditionally used 3 (1Mbps, 2 Mbps) as basic rates. this
> > > > clearly is wrong in the 5GHz band.
> > > 
> > > No, it's fine. Look again at how this works.
> > 
> > (hello? can you please stop treating me like an idiot?)
> > 
> > this means we use 6 and 9 as basic rates in the 5GHz band.
> > we should use 6, 12 and 24.
> 
> No, we can treat 6 and 9 as basic rates if we want to when we create the
> IBSS. You seem to be confusing basic and mandatory rates or something
> else that I can't make sense of. It's NOT "clearly wrong".

ok, i agree that we are probably allowed to choose any basic rates when we 
create an IBSS - but the question is: why would we want to use lower rates?

does it not make sense to use all mandatory rates as basic rates?

as a side note: the reason i am concerned about the basic rates is that when 
we use RTC/CTS (which are sent at a basic rate) thruput gets quite low when 
the basic rates are (too?) low. this is a tradeoff between reliability and 
speed - and probably should be user configurable. so maybe instead of adding a 
"g-only" flag to ibss creation, should i add an iw command for setting the 
basic rates? what do you think about that?

bruno