Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759926Ab2HXQ3b (ORCPT ); Fri, 24 Aug 2012 12:29:31 -0400 Received: from mail-iy0-f174.google.com ([209.85.210.174]:48186 "EHLO mail-iy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759830Ab2HXQ30 (ORCPT ); Fri, 24 Aug 2012 12:29:26 -0400 Message-ID: <5037ABE2.2020407@lwfinger.net> Date: Fri, 24 Aug 2012 11:29:22 -0500 From: Larry Finger User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120713 Thunderbird/14.0 MIME-Version: 1.0 To: Eric Dumazet CC: Neal Cardwell , "David S. Miller" , John W Linville , linux-wireless , LKML Subject: Re: Regression associated with commit c8628155ece3 - "tcp: reduce out_of_order memory use" References: <50345B12.1050600@lwfinger.net> <1345612503.5158.566.camel@edumazet-glaptop> <50355021.7000408@lwfinger.net> <1345694593.5904.87.camel@edumazet-glaptop> <50369925.3050705@lwfinger.net> <1345757200.5904.1890.camel@edumazet-glaptop> <50378B35.80307@lwfinger.net> <1345820142.4824.1.camel@edumazet-laptop> <5037A292.1020801@lwfinger.net> <1345824094.19483.9.camel@edumazet-glaptop> In-Reply-To: <1345824094.19483.9.camel@edumazet-glaptop> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 901 Lines: 23 On 08/24/2012 11:01 AM, Eric Dumazet wrote: > On Fri, 2012-08-24 at 10:49 -0500, Larry Finger wrote: > >> There is nothing in kernel log when it happens. The file STRACE is attached. >> > > So there is indeed a corruption. What was the driver you used in this > case ? The only driver that shows this problem is r8712u. One thought that I just had is that this driver does not use mac80211, which is why it is in staging. Instead it uses a Realtek soft MAC layer derived from the obsolete softmac driver that was in the kernel in the 2.6.20 time frame. That means that none of the skbs have ever been cloned by any part of the wireless code. Larry -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/