Re: Further improvements to the software scan implementation

[Johannes Berg <johannes@sipsolutions.net>]

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On Thu, 2009-07-16 at 11:38 +0200, Helmut Schaa wrote:
> Hi,
> 
> as already discussed with Johannes we can further optimize the scan
> implementation by allowing (on an active channel) to send probes as
> soon as any other frame is received (and updated the NAV) instead of
> ever waiting 30ms.

There's even two ways of implementing this:
 1) the easy way -- just check for received frames in mac80211
 2) the good way -- ask the driver to notify us of _any_ received frames
                    or poll the driver or something like that

1) is clearly very easy, but if it's seeing e.g. a control frame or a
frame for a different BSS then the device might not pass it up.

But to be honest, I wouldn't worry about 2) and let Jouni implement it
if he cares :) And if we want to make this improvement, 1) is good for
all hardware anyway.

johannes

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