From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265176AbUEZEwS (ORCPT ); Wed, 26 May 2004 00:52:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265179AbUEZEwS (ORCPT ); Wed, 26 May 2004 00:52:18 -0400 Received: from fw.osdl.org ([65.172.181.6]:47542 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S265165AbUEZEvD (ORCPT ); Wed, 26 May 2004 00:51:03 -0400 Date: Tue, 25 May 2004 21:50:50 -0700 (PDT) From: Linus Torvalds To: Benjamin Herrenschmidt cc: "David S. Miller" , wesolows@foobazco.org, willy@debian.org, Andrea Arcangeli , Andrew Morton , Linux Kernel list , mingo@elte.hu, bcrl@kvack.org, linux-mm@kvack.org, Linux Arch list Subject: Re: [PATCH] ppc64: Fix possible race with set_pte on a present PTE In-Reply-To: <1085545114.5578.11.camel@gaston> Message-ID: References: <1085369393.15315.28.camel@gaston> <1085371988.15281.38.camel@gaston> <1085373839.14969.42.camel@gaston> <20040525034326.GT29378@dualathlon.random> <20040525114437.GC29154@parcelfarce.linux.theplanet.co.uk> <20040525153501.GA19465@foobazco.org> <20040525102547.35207879.davem@redhat.com> <20040525105442.2ebdc355.davem@redhat.com> <1085521251.24948.127.camel@gaston> <1085522860.15315.133.camel@gaston> <1085530867.14969.143.camel@gaston> <1085541906.14969.412.camel@gaston> <1085544720.5580.9.camel@gaston> <1085545114.5578.11.camel@gaston> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 26 May 2004, Benjamin Herrenschmidt wrote: > > Hrm... Still dies, some kind of loop it seems, I'll have a look Are you sure the it's not just taking infinite page fault because we keep reloading the old value from the hash tables? That "hash fault" thing still doesn't convince me. Why should the hash-refill fastpath ever look at the software page tables? Linus