Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422800AbWJZTW2 (ORCPT ); Thu, 26 Oct 2006 15:22:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1422825AbWJZTW2 (ORCPT ); Thu, 26 Oct 2006 15:22:28 -0400 Received: from zeniv.linux.org.uk ([195.92.253.2]:23269 "EHLO ZenIV.linux.org.uk") by vger.kernel.org with ESMTP id S1422800AbWJZTW2 (ORCPT ); Thu, 26 Oct 2006 15:22:28 -0400 Date: Thu, 26 Oct 2006 20:22:20 +0100 From: Al Viro To: Avi Kivity Cc: Josef Sipek , lkml@pengaru.com, linux-kernel@vger.kernel.org Subject: Re: rename() contention (BUG?) Message-ID: <20061026192219.GL29920@ftp.linux.org.uk> References: <20061025205634.GB9100@shells.gnugeneration.com> <20061025211341.GB7128@filer.fsl.cs.sunysb.edu> <454101D6.9050004@argo.co.il> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <454101D6.9050004@argo.co.il> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 662 Lines: 14 On Thu, Oct 26, 2006 at 08:43:34PM +0200, Avi Kivity wrote: > The changes make the mutex more efficient, but won't decrease the > contention. It seems that all renames in one filesystem are serialized, > and if the renames require I/O (which is certainly the case with nfs), > rename throughput is severely limited. They are, and for a good reason. For details see Documentation/filesystems/directory-locking. - 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/