From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wg0-x229.google.com (mail-wg0-x229.google.com [IPv6:2a00:1450:400c:c00::229]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 7A21521F0B0; Mon, 14 Apr 2014 21:06:30 -0700 (PDT) Received: by mail-wg0-f41.google.com with SMTP id n12so9037497wgh.12 for ; Mon, 14 Apr 2014 21:06:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type :content-transfer-encoding; bh=tlTRVr0fhZsS42gIL2IUeWJLDAI1rLRsfngIsjhvb+c=; b=Bi6hIvLK1e09x5YaDYDQCIowtWIm7TLsjQQbxXGEH1f3xf/K3+Yz4PoNjWvASH5OTt hdUzfgq4X1Ye9C5YM+JiGz8KgNQZkf28L+1B8fFzvAmWkyIN4WUlCdA0Zs53R/2vQh/U /k2btvVCg6OCQmxNNsG3RgZmgKQM5y3SDby/F21CvLmq7fu7IkJZ95Fa/Iwe4q8PeUoU GvG9oQFTSboYj2HfuCSOtAAFRQz+ip5ZbC5sF7kuc4KM5xrsmnVoVrEBriDucQ+thTCF T4kBpCDoBBrvNIERVAqH1+LrV+UXvXqs1SOJQKhpa42ETAL9G7KuzOG+CaGhW/ZjtXFp mzuw== MIME-Version: 1.0 X-Received: by 10.195.12.33 with SMTP id en1mr35433148wjd.31.1397534788053; Mon, 14 Apr 2014 21:06:28 -0700 (PDT) Received: by 10.216.177.10 with HTTP; Mon, 14 Apr 2014 21:06:28 -0700 (PDT) Date: Mon, 14 Apr 2014 21:06:28 -0700 Message-ID: From: Dave Taht To: "cerowrt-devel@lists.bufferbloat.net" , cerowrt@lists.bufferbloat.net Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: [Cerowrt-devel] Fwd: [bug #422] ath9k queue hang X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Apr 2014 04:06:31 -0000 regrettably I am too wiped to look this over further right now, but the pat= chset seems very promising. I will review on a fresh brain in the morning. Other eyeballs desired - this will have to get patched on top of 3.14 and then backported to the 3.10 backport.... ---------- Forwarded message ---------- From: Ben Greear Date: Mon, Apr 14, 2014 at 8:49 PM Subject: Re: [ath9k-devel] ath9k queue hang To: Dave Taht , "ath9k-devel@lists.ath9k.org" On 04/14/2014 07:16 PM, Dave Taht wrote: > > We have been trying to replicate a bug in seeing wifi connections hanging > in strange ways after tons of data is transferred... for several months n= ow. > > The symptoms varied, anything from multicast failing to background or bes= t > effort traffic failing - from local access working with remote access > not working... > > Last week, we finally got a situation where we had enough debugging on to= see > something that matches the symptoms we saw, in that one of the wifi queue= s > would hang and leave the overlying qdisc full of packets that didn't drai= n. Sounds familiar...I had a relatively clean patch in the 3.9 days, but had s= ome issues merging along the way and haven't bothered to rebase it, so patch is not as clean as it used to be: http://dmz2.candelatech.com/git/?p=3Dlinux-3.14.dev.y/.git;a=3Dcommitdiff;h= =3Da34e34f46fbffc627dfc2d93c508f580fbaf29e2;hp=3Dcce0d841338348c69ae6f7ef1b= 2bc8a6abea3fc4 http://dmz2.candelatech.com/git/?p=3Dlinux-3.14.dev.y/.git;a=3Dcommitdiff;h= =3D3ecefa9c9f7eed21002dad7a6540d6d250297466;hp=3D134543c6fec7e28bf91272ce99= 5b550b1bf73c62 I posted the patch to the mailing lists some time back..maybe a year or two= ago. If I recall, we could reproduce our problem fairly reliably by stepping an attenuator in 10 db steps while under load. I'd be curious to know if you try it out and it works for you... Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com --=20 Dave T=C3=A4ht NSFW: https://w2.eff.org/Censorship/Internet_censorship_bills/russell_0296_= indecent.article