Return-path: Received: from ey-out-2122.google.com ([74.125.78.25]:27004 "EHLO ey-out-2122.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753703AbZKIIhe (ORCPT ); Mon, 9 Nov 2009 03:37:34 -0500 Received: by ey-out-2122.google.com with SMTP id 25so115526eya.19 for ; Mon, 09 Nov 2009 00:37:38 -0800 (PST) To: Holger Schurig Cc: Jan Kiszka , linux-wireless@vger.kernel.org Subject: Re: ar9170 in AP mode References: <4AF6C7CD.7060108@web.de> <878wehf85v.fsf@purkki.valot.fi> <4AF6CC02.8080204@web.de> From: Kalle Valo Date: Mon, 09 Nov 2009 10:37:36 +0200 In-Reply-To: (Holger Schurig's message of "Mon\, 09 Nov 2009 09\:16\:19 +0100") Message-ID: <87ocncdrfz.fsf@purkki.valot.fi> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-wireless-owner@vger.kernel.org List-ID: Holger Schurig writes: >> How common is the combination of powersaving and mcast in practice? >> Given that quite a few useful scenarios are blocked right now (unless >> you know what to patch), I would at least vote for a config option or a >> module parameter. That gives a chance to warn the user about this >> limitation without locking out people that are no hackers. > > In my case (hand-help devices) it's very common. Without power-save, > the battery would be drained so fast it wouldn't be usable. Yes, just to give a concrete example of n810 wlan idle case (associated, but no data transfered): ps off 7 hours ps on 7 days Huge difference. > And with power-save and an AP that can't handle this, you'd get > weird errors. Exactly. These kinds of errors are very difficult for the users to understand. > So, I personally prefer to have "Do an AP right" or "Don't do it at > all". But please no general enablement. > > But, for example, having some CONFIG_AR9K_AP_MODE depending on > CONFIG_EXPERIMENTAL and a bit fat warning would do for me. Hopefully > this would scara away distros, so that they don't turn this on for > there standard kernel :-) I think EXPERIMENTAL is not enough, I would prefer that the user needs to patch the driver to enable it. Or if that's not good enough, then maybe depend on BROKEN. -- Kalle Valo