Return-path: Received: from mail-pb0-f46.google.com ([209.85.160.46]:38614 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752296Ab2H0SVq (ORCPT ); Mon, 27 Aug 2012 14:21:46 -0400 Subject: Re: Regression associated with commit c8628155ece3 - "tcp: reduce out_of_order memory use" From: Eric Dumazet To: Larry Finger Cc: David Miller , ncardwell@google.com, linville@tuxdriver.com, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <503BB49C.5010402@lwfinger.net> References: <50369925.3050705@lwfinger.net> <1345757200.5904.1890.camel@edumazet-glaptop> <50378B35.80307@lwfinger.net> <20120824.111948.680531915905273128.davem@davemloft.net> <5037A4B0.3080208@lwfinger.net> <1345825095.19483.19.camel@edumazet-glaptop> <1345825432.19483.20.camel@edumazet-glaptop> <5037B2AC.50704@lwfinger.net> <1345830424.19483.69.camel@edumazet-glaptop> <503BB49C.5010402@lwfinger.net> Content-Type: text/plain; charset="UTF-8" Date: Mon, 27 Aug 2012 11:21:41 -0700 Message-ID: <1346091701.26634.6.camel@edumazet-glaptop> (sfid-20120827_202210_940695_ABDED944) Mime-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org List-ID: On Mon, 2012-08-27 at 12:55 -0500, Larry Finger wrote: > I have prepared a patch to fix all the unchecked allocations. > > Over the weekend I made some progress. To test the latest vendor driver, I > installed a 32-bit system. Their driver is not compatible with a 64-bit system. > I found that not only did the vendor driver work with secure sites, but so did > the in-kernel version. I now have tcpdump output for the 32-bit case that works, > and the 64-bit case that fails. It seems likely that I missed some 32/64 bit > incompatibility when I did the conversion. > > Thanks for all your help in trying to resolve this issue. Interesting, so these 32/64 bits problems did not happen in prior kernels ? (< 3.4 )