Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965157AbWJBR0g (ORCPT ); Mon, 2 Oct 2006 13:26:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965159AbWJBR0g (ORCPT ); Mon, 2 Oct 2006 13:26:36 -0400 Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:2486 "EHLO lxorguk.ukuu.org.uk") by vger.kernel.org with ESMTP id S965157AbWJBR0f (ORCPT ); Mon, 2 Oct 2006 13:26:35 -0400 Subject: Re: Postal 56% waits for flock_lock_file_wait From: Alan Cox To: Trond Myklebust Cc: Tim Chen , "Ananiev, Leonid I" , Linux Kernel Mailing List In-Reply-To: <1159809081.5466.3.camel@lade.trondhjem.org> References: <1159723092.5645.14.camel@lade.trondhjem.org> <3282373b0610020957u739392eekf8b78c7574e1a6e7@mail.gmail.com> <1159809081.5466.3.camel@lade.trondhjem.org> Content-Type: text/plain Content-Transfer-Encoding: 7bit Date: Mon, 02 Oct 2006 18:51:56 +0100 Message-Id: <1159811516.8907.38.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.6.2 (2.6.2-1.fc5.5) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 748 Lines: 15 Ar Llu, 2006-10-02 am 13:11 -0400, ysgrifennodd Trond Myklebust: > Ext3 does not use flock() in order to lock its journal. The performance > issues that he is seeing may well be due to the journalling, but that > has nothing to do with flock_lock_file_wait. The ext3 journal also generally speaking improves many-writer performance as do the reservations so the claim seems odd on that basis too. Rerun the test on a gigabyte iRam or similar and you'll see where the non-media bottlenecks actually are - 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/