Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 12 Nov 2001 18:15:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 12 Nov 2001 18:15:49 -0500 Received: from sydney1.au.ibm.com ([202.135.142.193]:39176 "EHLO haven.ozlabs.ibm.com") by vger.kernel.org with ESMTP id ; Mon, 12 Nov 2001 18:15:35 -0500 Date: Mon, 12 Nov 2001 20:59:05 +1100 From: Rusty Russell To: Helge Hafting Cc: linux-kernel@vger.kernel.org Subject: Re: speed difference between using hard-linked and modular drives? Message-Id: <20011112205905.4a695ed3.rusty@rustcorp.com.au> In-Reply-To: <3BEBBB21.357149FC@idb.hist.no> In-Reply-To:

<20011109141215.08d33c96.rusty@rustcorp.com.au> <3BEBBB21.357149FC@idb.hist.no> X-Mailer: Sylpheed version 0.5.3 (GTK+ 1.2.10; powerpc-unknown-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 09 Nov 2001 12:16:49 +0100 Helge Hafting wrote: > Rusty Russell wrote: > > > Modules have lots of little disadvantages that add up. The speed penalty > > on various platforms is one, the load/unload race complexity is another. > > > Races can be fixed. (Isn't that one of the things considered for 2.5?) We get more problems if we go preemptible (some seem to thing that preemption is "free"). And some races can be fixed by paying more of a speed penalty (atomic_inc & atomic_dec_and_test for every packet, anyone?). Hope that clarifies, Rusty. - 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/