Return-path: Received: from fg-out-1718.google.com ([72.14.220.156]:9442 "EHLO fg-out-1718.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933475AbZHEFux convert rfc822-to-8bit (ORCPT ); Wed, 5 Aug 2009 01:50:53 -0400 Received: by fg-out-1718.google.com with SMTP id e21so1334277fga.17 for ; Tue, 04 Aug 2009 22:50:52 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <1249450416.4168.22.camel@johannes.local> References: <1249056817.20593.1.camel@maxim-laptop> <1249056896.20593.3.camel@maxim-laptop> <1249438947.3094.30.camel@localhost.localdomain> <1249450153.6083.4.camel@maxim-laptop> <1249450416.4168.22.camel@johannes.local> From: =?ISO-8859-1?Q?G=E1bor_Stefanik?= Date: Wed, 5 Aug 2009 07:50:30 +0200 Message-ID: <69e28c910908042250n1e0bf9c6v20b6301db9e3286b@mail.gmail.com> Subject: Re: [PATCH 001/002] [MAC80211] Retry probe request few times To: Johannes Berg Cc: Maxim Levitsky , Marcel Holtmann , linux-wireless , linville , Reinette Chatre Content-Type: text/plain; charset=windows-1252 Sender: linux-wireless-owner@vger.kernel.org List-ID: On Wed, Aug 5, 2009 at 7:33 AM, Johannes Berg wrote: > On Wed, 2009-08-05 at 08:29 +0300, Maxim Levitsky wrote: > >> > [54632.657912] No probe response from AP 00:1c:f0:xx:xx:xx after 500ms, try 1 >> > [54633.154560] No probe response from AP 00:1c:f0:xx:xx:xx after 500ms, try 2 >> > [54873.231210] No probe response from AP 00:1c:f0:xx:xx:xx after 500ms, try 1 >> > [55113.467840] No probe response from AP 00:1c:f0:xx:xx:xx after 500ms, try 1 >> > [55113.964510] No probe response from AP 00:1c:f0:xx:xx:xx after 500ms, try 2 >> > [55114.464516] No probe response from AP 00:1c:f0:xx:xx:xx after 500ms, try 3 >> > [55114.967868] No probe response from AP 00:1c:f0:xx:xx:xx after 500ms, try 4 >> > [55115.464511] No probe response from AP 00:1c:f0:xx:xx:xx after 500ms, disconnecting. >> > >> > Should we increase the value to 8 or something? Or just accept that >> > sometimes we get a disconnect? >> > >> I think a disconnect or two aren't a problem, they are always handled >> automatically, and can be caused by natural events. >> >> Even without these patches (I have WPA2, and disconnects were every 4 >> five seconds), and still it was possible to use network. >> >> One disconnect in a day is really nothing to worry about (I have seen >> such here as well) >> >> You can increase try count, probably won't hurt much (each try is 0.5 >> seconds, so even 10 tries gives total of 5 seconds, before disconnect on >> a really unaccessible AP, anyway) > > Mind you, each try will end up sending a LOT of probe request frames, > iwlwifi sends like 12 frames for every try and never gets a response for > some reason, so I wouldn't really increase it much further since you'd > be spamming around a lot. > > johannes > My ?0.02 (? because I'm European :) ): Shouldn't probe requests be NO_ACK? -- Vista: [V]iruses, [I]ntruders, [S]pyware, [T]rojans and [A]dware. :-)