From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-x236.google.com (mail-wi0-x236.google.com [IPv6:2a00:1450:400c:c05::236]) (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 7C25321F19A for ; Wed, 11 Dec 2013 10:41:44 -0800 (PST) Received: by mail-wi0-f182.google.com with SMTP id en1so1339032wid.15 for ; Wed, 11 Dec 2013 10:41:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=i9i/QC743jHCLRJqnLCyo+5Dd09qVgZ3pFX0DUQI+9E=; b=og+M0Xz1f6KtWQbp1s30VkXSz4Ybv0c7oFk2q85/cPMk3j8pG8ME/p9ldulYzQKeXQ rTMQzNwCTlgRnceGoBHkxjpNmODetyfC4shu1E0PRDyiyYoKb8N4BYGnqQqBgmdVriP7 FimsoGeD8/Cn+6clwBQwe+144EixajqC5x1XOpDX54aIC5JQC+AY5n/NGurV7L12ZUj4 MftnGVyE1rXK4yltb8lA3FzCHy6ySRE4IphRyoZf2z/scgReuLIExw2E3R7tO665LVzp HXAvbxeksf2SSuKwRRNuiLks7qjpnEkyY3nn5mE/m9itU5ok+H8PwwRK4vMigm3TlOQU HzNg== MIME-Version: 1.0 X-Received: by 10.180.7.136 with SMTP id j8mr25988802wia.17.1386787302820; Wed, 11 Dec 2013 10:41:42 -0800 (PST) Received: by 10.217.123.69 with HTTP; Wed, 11 Dec 2013 10:41:42 -0800 (PST) In-Reply-To: <20131211085813.57b27abe@nehalam.linuxnetplumber.net> References: <20131211085813.57b27abe@nehalam.linuxnetplumber.net> Date: Wed, 11 Dec 2013 10:41:42 -0800 Message-ID: From: Dave Taht To: Stephen Hemminger Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: "cerowrt-devel@lists.bufferbloat.net" Subject: Re: [Cerowrt-devel] Wireless failures 3.10.17-3 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: Wed, 11 Dec 2013 18:41:44 -0000 I have the regrettable problem of mostly testing the 5ghz channel due to interference issues on the 2ghz band. What I am seeing in the last several releases of the 3.8.x and 3.10 series is after tons of traffic and multiple days of uptime a DMA tx error which you can see via the logread or dmesg tool, and once it happens, at least sometimes, that radio can "go away" and not be resettable. "cannot stop tx dma" is the error. I have seen this error many, many times in cerowrt releases for the last 2 years, but this time it seems more severe than usual. There was also a bug in dnsmasq or somewhere in the lower level of the stack where it stops responding to multicast dhcp packets. The upcoming 3.10.23-1 development release has a refresh of mac80211, and a bug fix related to multicast, so I have some hope for it. It has also the latest dnsmasq 2.68 (which fixes a bug in cname handling in particular), and also pie v3 but I am (as usual) not in a position to test it right now. It is my hope that now that the bug happens a lot we can track it down. Or, that it's fixed. :) I just put that release up at: http://snapon.lab.bufferbloat.net/~cero2/cerowrt/wndr/3.10.23-1/ It does not have the updated aqm-scripts code and gui (sorry sebastian), nor the pie v4 drop that just got rejected for kernel mainline. I'll try to do a respin this weekend with those, and poke harder at the dma tx issue after I get back in the lab. Thoughts towards being able to isolate the cause and minimize the effect are welcomed - it's one of the biggest barriers to declaring a stable release at this point! On Wed, Dec 11, 2013 at 8:58 AM, Stephen Hemminger wrote: > Has anyone seen wireless failing after several days with 3.10.17-3? > > The symptoms are devices fall off the net several days (or a week) after > router has been running. I saw the bg AP go away, but the 5 Ghz AP still > working. Wired attachment works. > _______________________________________________ > Cerowrt-devel mailing list > Cerowrt-devel@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/cerowrt-devel --=20 Dave T=E4ht Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.= html