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Re: [RFC 2/3] mac80211: Support scanning only current active channel.

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On Thu, 2011-01-20 at 10:06 -0800, Ben Greear wrote:

> > This doesn't seem to make much sense either -- even if we do a scan over
> > multiple channels we should be able to optimise the part on the current
> > channel (maybe put it at the beginning or end too).
> 
> Maybe..but user-space can specify the channels it wants to scan,
> and I assume that means what order to scan them in.  I have no
> idea if changing that order would confuse some application.

No, it can't actually determine the order -- we sort them in cfg80211
anyway to de-duplicate them.

> It seems to me that it would take quite a bit of re-work of the
> mac80211 scanning logic to deal with scanning on the current
> channel w/out affecting other tx/rx packets (as my patch attempts
> to do), without setting some explicit flag before you enter
> the scan state machine.

Yeah, so maybe it needs some re-work, but I think what you're doing is a
pretty strange hack.

johannes

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