Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751629Ab0GAXM3 (ORCPT ); Thu, 1 Jul 2010 19:12:29 -0400 Received: from caramon.arm.linux.org.uk ([78.32.30.218]:49028 "EHLO caramon.arm.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750792Ab0GAXM1 (ORCPT ); Thu, 1 Jul 2010 19:12:27 -0400 Date: Fri, 2 Jul 2010 00:12:07 +0100 From: Russell King To: "Kirill A. Shutemov" Cc: g@shutemov.name, Greg KH , linux-kernel@vger.kernel.org, stable@kernel.org, stable-review@kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Anfei Zhou Subject: Re: [patch 071/149] ARM: 6166/1: Proper prefetch abort handling on pre-ARMv6 Message-ID: <20100701231207.GB27389@flint.arm.linux.org.uk> References: <20100701175144.GA2116@kroah.com> <20100701173212.785441106@clark.site> <20100701221420.GA10481@shutemov.name> <20100701221728.GA12187@suse.de> <20100701222541.GB10481@shutemov.name> <20100701224837.GA27389@flint.arm.linux.org.uk> <20100701225911.GC10481@shutemov.name> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100701225911.GC10481@shutemov.name> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1109 Lines: 29 On Fri, Jul 02, 2010 at 01:59:11AM +0300, Kirill A. Shutemov wrote: > On Thu, Jul 01, 2010 at 11:48:37PM +0100, Russell King wrote: > > One possibility is that for some reason you're using the legacy prefetch > > abort code or pre-IFSR code, which will always tell the kernel that its > > a translation fault - and in this case, this patch would improve the > > situation. What kernel version are you using? > > 2.6.32 Should be recent enough. > If you run this test in loop on kernel without the patch you'll finally > get hung instead SIGSEGV. > > It seems the patch fixes more than it was written for. :) Have you investigated the IFSR and IFAR values, and the corresponding page table state? I'm not going to be able to run your test code for a few days. -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: -- 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/