Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266140AbUA1TlX (ORCPT ); Wed, 28 Jan 2004 14:41:23 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266175AbUA1TlX (ORCPT ); Wed, 28 Jan 2004 14:41:23 -0500 Received: from ns.suse.de ([195.135.220.2]:7396 "EHLO Cantor.suse.de") by vger.kernel.org with ESMTP id S266140AbUA1Tkv (ORCPT ); Wed, 28 Jan 2004 14:40:51 -0500 Date: Wed, 28 Jan 2004 20:40:49 +0100 From: Andi Kleen To: Linus Torvalds Cc: willy@debian.org, ishii.hironobu@jp.fujitsu.com, linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org Subject: Re: [RFC/PATCH, 2/4] readX_check() performance evaluation Message-Id: <20040128204049.627e6312.ak@suse.de> In-Reply-To: References: <00a301c3e541$c13a6350$2987110a@lsd.css.fujitsu.com> <20040128182003.GL11844@parcelfarce.linux.theplanet.co.uk> X-Mailer: Sylpheed version 0.9.7 (GTK+ 1.2.10; i686-pc-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 Content-Length: 667 Lines: 18 On Wed, 28 Jan 2004 11:33:33 -0800 (PST) Linus Torvalds wrote: > For example, if checking for an error involves actually reading a value > from a bridge register, then that implies some _serious_ amount of > serialization and external CPU stuff. Which is _extremly_ hard to do from an MCE handler ... (currently all our MCE handlers are buggy because they can deadlock on the printk lock) -Andi - 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/