Return-path: Received: from smtp.nokia.com ([192.100.105.134]:31021 "EHLO mgw-mx09.nokia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758394AbYGOTcz (ORCPT ); Tue, 15 Jul 2008 15:32:55 -0400 To: "Johannes Berg" Cc: Tomas Winkler , linville@tuxdriver.com, yi.zhu@intel.com, linux-wireless@vger.kernel.org Subject: Re: [PATCH 2/2] mac80211: make listen_interval be configurable by low level driver References: <1216038684-29725-1-git-send-email-tomas.winkler@intel.com> <1216038684-29725-2-git-send-email-tomas.winkler@intel.com> <1216039127.11189.15.camel@johannes.berg> <1ba2fa240807140546w4f08e32l59ed88dfa1b86403@mail.gmail.com> <87fxqcoaue.fsf@nokia.com> <1216109543.23746.21.camel@johannes.berg> From: Kalle Valo Date: Tue, 15 Jul 2008 22:30:52 +0300 In-Reply-To: <1216109543.23746.21.camel@johannes.berg> (ext Johannes Berg's message of "Tue\, 15 Jul 2008 10\:12\:23 +0200") Message-ID: <87skub9c7n.fsf@nokia.com> (sfid-20080715_213258_338190_5569F22B) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-wireless-owner@vger.kernel.org List-ID: Johannes Berg writes: >> Yes, for the user this is too difficult, but I think the driver >> shouldn't be making the decision either. So mac80211 stack would be >> the most logical choice, and it could be make the decisions based on >> user input (or something like that). > > Well, the user may want to make a choice based on the latency. Yeah, latency might be a good choise for the user. Also it would be nice to be able to say if packet loss is acceptable. For example, I have heard cases where DTIMs are skipped just to save power in the expense of loosing some of the broadcast and multicast frames. > Or, ideally, we would detect that they're using voice and want lower > latency. Or something like that. In that case U-APSD needs to be considered as well. This PSM stuff will be challenging... -- Kalle Valo