Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751710AbaBHOJ2 (ORCPT ); Sat, 8 Feb 2014 09:09:28 -0500 Received: from mail-pb0-f49.google.com ([209.85.160.49]:64762 "EHLO mail-pb0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751193AbaBHOJ0 (ORCPT ); Sat, 8 Feb 2014 09:09:26 -0500 Message-ID: <1391868564.10160.91.camel@edumazet-glaptop2.roam.corp.google.com> Subject: Re: REGRESSION f54b311142a92ea2e42598e347b84e1655caf8e3 tcp auto corking slows down iSCSI file system creation by factor of 70 [WAS: 4 TB VMFS creation takes 15 minutes vs 26 seconds] From: Eric Dumazet To: Thomas Glanzmann Cc: John Ogness , Eric Dumazet , "David S. Miller" , "Nicholas A. Bellinger" , target-devel , Linux Network Development , LKML Date: Sat, 08 Feb 2014 06:09:24 -0800 In-Reply-To: <20140208133744.GA20512@glanzmann.de> References: <20140206153640.GB4103@glanzmann.de> <1391727771.14985.41.camel@haakon3.risingtidesystems.com> <20140207051500.GB10916@glanzmann.de> <20140207075536.GB17815@glanzmann.de> <1391801597.1155.28.camel@haakon3.risingtidesystems.com> <20140207205142.GA8609@glanzmann.de> <20140208093808.GD16336@glanzmann.de> <1391865273.10160.76.camel@edumazet-glaptop2.roam.corp.google.com> <20140208133744.GA20512@glanzmann.de> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 2014-02-08 at 14:37 +0100, Thomas Glanzmann wrote: > > It fixes my case but if you look at the round trip time it is not even > close what it used to be. So while this fixes my problem I'm still for > disabling it by default. > > https://thomas.glanzmann.de/tmp/tcp_auto_corking_on_patched.pcap.bz2 This pcap was taken on which host ? 10.101.99.5 or 10.101.0.13 ? -- 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/