Return-path: Received: from mail-ob0-f174.google.com ([209.85.214.174]:49107 "EHLO mail-ob0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751527Ab2HVEHv (ORCPT ); Wed, 22 Aug 2012 00:07:51 -0400 Message-ID: <50345B12.1050600@lwfinger.net> (sfid-20120822_060814_072944_17941B17) Date: Tue, 21 Aug 2012 23:07:46 -0500 From: Larry Finger MIME-Version: 1.0 To: Eric Dumazet , Neal Cardwell , "David S. Miller" , John W Linville , linux-wireless CC: LKML Subject: Regression associated with commit c8628155ece3 - "tcp: reduce out_of_order memory use" Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: Hi, The commit entitled "tcp: reduce out_of_order memory use" turns out to cause problems with a number of USB drivers. The first one called to my attention was for staging/r8712u. For this driver, there are problems with SSL communications as reported in https://bugzilla.redhat.com/show_bug.cgi?id=847525. Other drivers including rtl8187, rtl8192cu and rt2800usb cannot connect to a WPA1- or WEP-encrypted AP, but work fine with WPA2. The rtl8192cu problem is reported in https://bugzilla.kernel.org/show_bug.cgi?id=46171. I find it hard to understand why this patch should cause these effects; however, I have verified that a kernel generated from "git checkout e86b2919" works fine. This commit is immediately before the patch in question. Note, this patch was applied during the merge between 3.3 and 3.4. The regression has been undiscovered for some time. Any help on this problem will be appreciated. Larry