Return-path: Received: from s3.sipsolutions.net ([144.76.43.152]:49743 "EHLO sipsolutions.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755844AbaEGMN2 (ORCPT ); Wed, 7 May 2014 08:13:28 -0400 Message-ID: <1399464789.10517.29.camel@jlt4.sipsolutions.net> (sfid-20140507_141331_481203_12B8434F) Subject: Re: [PATCH v5] mac80211: implement multi-vif in-place reservations From: Johannes Berg To: Luca Coelho Cc: Michal Kazior , linux-wireless , Simon Wunderlich Date: Wed, 07 May 2014 14:13:09 +0200 In-Reply-To: <1399464536.6800.11.camel@dubbel> References: <1397050174-26121-14-git-send-email-michal.kazior@tieto.com> <1398849681-3606-1-git-send-email-michal.kazior@tieto.com> <1399372915.4218.17.camel@jlt4.sipsolutions.net> <1399385141.4218.37.camel@jlt4.sipsolutions.net> <1399450061.5038.10.camel@jlt4.sipsolutions.net> <1399455657.6800.4.camel@dubbel> <1399457760.6800.7.camel@dubbel> <1399460964.10517.12.camel@jlt4.sipsolutions.net> (sfid-20140507_131912_954267_EF512364) <1399463646.10517.28.camel@jlt4.sipsolutions.net> <1399464536.6800.11.camel@dubbel> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org List-ID: On Wed, 2014-05-07 at 15:08 +0300, Luca Coelho wrote: > I was thinking about the case where you you need to involve 3 contexts. > Let's say you have 2 vifs in the same context and after the switch you > need to split them into 2 new ones (for instance, if there is some > incompatibility in the new chandefs). > > With the generic transactions you could do: > - new chanctx2 > - new chanctx3 > - switch vif1 chanctx1->chanctx2 > - switch vif2 chanctx1->chanctx3 > - del chanctx1 This isn't an interesting case, because it means you have a spare, so you might as well do new chanctx3 switch vif2 chanctx1->chanctx3 switch_transaction(chanctx1, chanctx2, vif1) johannes