Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753292Ab2KKP0t (ORCPT ); Sun, 11 Nov 2012 10:26:49 -0500 Received: from merlin.infradead.org ([205.233.59.134]:45014 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753150Ab2KKP0r (ORCPT ); Sun, 11 Nov 2012 10:26:47 -0500 Message-ID: <1352647601.9449.130.camel@shinybook.infradead.org> Subject: Re: [PATCH v3 8/7] pppoatm: fix missing wakeup in pppoatm_send() From: David Woodhouse To: Krzysztof Mazur Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Chas Williams - CONTRACTOR , davem@davemloft.net Date: Sun, 11 Nov 2012 15:26:41 +0000 In-Reply-To: <20121111135002.GA32390@shrek.podlesie.net> References: <1352240222-363-1-git-send-email-krzysiek@podlesie.net> <1352292734.7340.35.camel@shinybook.infradead.org> <20121110202338.GA1749@shrek.podlesie.net> <1352618933.9449.113.camel@shinybook.infradead.org> <20121111110437.GA25894@shrek.podlesie.net> <1352633993.9449.120.camel@shinybook.infradead.org> <20121111135002.GA32390@shrek.podlesie.net> Content-Type: multipart/signed; micalg="sha1"; protocol="application/x-pkcs7-signature"; boundary="=-GzZHLGDrsJc6A4LcXbx+" X-Mailer: Evolution 3.6.1 (3.6.1-1.fc18) Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 9724 Lines: 152 --=-GzZHLGDrsJc6A4LcXbx+ Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Sun, 2012-11-11 at 14:50 +0100, Krzysztof Mazur wrote: > Looks and works ok after: > + atmvcc->unlock_cb =3D pppoatm_unlock_cb; Heh, yeah. That would probably help :) Not sure if it's really necessary to optimise out the unneeded wakeups =E2= =80=94 I don't think that code path gets exercised very hard for normal passing of packets. Maybe only LCP echo and responses, on a live connection? But yeah, the locking *is* that simple, isn't it =E2=80=94 and not the pain= ful stuff I had to do for the BLOCKED flag, which is why I deferred that question to concentrate on the basic concept of using ->release_cb(). So it's silly *not* to do the 'need_wakeup'. But could it also live in the 'blocked' word rather than expanding the structure further? 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