Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756615AbXK1PHS (ORCPT ); Wed, 28 Nov 2007 10:07:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756153AbXK1PHG (ORCPT ); Wed, 28 Nov 2007 10:07:06 -0500 Received: from saraswathi.solana.com ([198.99.130.12]:41520 "EHLO saraswathi.solana.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754892AbXK1PHE (ORCPT ); Wed, 28 Nov 2007 10:07:04 -0500 Date: Wed, 28 Nov 2007 10:06:37 -0500 From: Jeff Dike To: Miklos Szeredi Cc: mingo@elte.hu, user-mode-linux-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org Subject: Re: -rt doesn't compile for UML Message-ID: <20071128150637.GA5518@c2.user-mode-linux.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.3i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 660 Lines: 19 On Wed, Nov 28, 2007 at 01:47:20PM +0100, Miklos Szeredi wrote: > When writing a big file to a ubd disk, everything in uml slows down to > a crawl, even though CPU usage is minimal. What exactly is your test case? I have some patches which theoretically should help I/O performance which I've been sitting on because I can't find a case where they help. Jeff -- Work email - jdike at linux dot intel dot com - 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/