From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Greear Subject: Re: Networking hangs when too many parallel requests are made at once Date: Tue, 09 Nov 2010 11:16:48 -0800 Message-ID: <4CD99E20.4060307@candelatech.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org To: Luke Hutchison Return-path: Received: from mail.candelatech.com ([208.74.158.172]:46055 "EHLO ns3.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752278Ab0KITQw (ORCPT ); Tue, 9 Nov 2010 14:16:52 -0500 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: On 11/09/2010 11:04 AM, Luke Hutchison wrote: > On Tue, Nov 9, 2010 at 1:30 PM, Luke Hutchison wrote: >> Since around Linux kernel 2.6.33 or so (but maybe as early as >> 2.6.31, not sure exactly what version), when restoring a crashed or >> closed browser session of either Firefox or Chrome where lots of tabs >> (say 10-40) open simultaneously, the networking stack is brought to >> its knees -- most or all the tabs eventually time out without data, or >> a few tabs might get some data and then display a partial web page. Have you been able to reproduce this on any other machine? I suspect it might be an issue with your specific NIC or other hardware. At the least, it's not a general problem with opening lots of TCP connections, as we routinely test with thousands... Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com