Re: [PATCH v6 3/6] cfg80211: add scan flag to indicate its priority

["Arend van Spriel" <arend@broadcom.com>]

On 10/18/2012 08:44 PM, Bing Zhao wrote:
> Hi Arend,
>
>>> From: Sam Leffler <sleffler@chromium.org>
>>>
>>> Add NL80211_SCAN_FLAG_LOW_PRIORITY flag support. It tells drivers
>>> that this is a low priority scan request, so that they can take
>>> necessary action.
>>> Drivers need to advertise low priority scan capability during
>>> registration.
>>
>> I missed the previous versions of this patch series, but what 'necessary
>> action' is needed for a low priority scan request. Patch #6 gives a clue
>> so my assumption is that a low prio scan will be *aborted* when
>> associated and data traffic is available. Is that correct? Could it also
>
> It's up to the driver to decide and implement the 'low priority scan' feature.
> The driver can defer or abort the low priority scan request depending on various conditions.
> For example, when heavy data traffic is on going you may want to abort the scan.

Thanks, Bing

I always find such answer tricky. Seeing where this is coming from I 
suspect there is some high-level expectation from user-space 
perspective. I suspect it is something like: A low-prio scan should not 
affect a data transfer (iperf, nfs i/o, etc.) noticably.

Thanks for collecting the reading material ;-)

Gr. AvS