Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264286AbTH1U1E (ORCPT ); Thu, 28 Aug 2003 16:27:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264289AbTH1U1D (ORCPT ); Thu, 28 Aug 2003 16:27:03 -0400 Received: from fw.osdl.org ([65.172.181.6]:16826 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S264286AbTH1U00 (ORCPT ); Thu, 28 Aug 2003 16:26:26 -0400 Date: Thu, 28 Aug 2003 13:10:19 -0700 From: Andrew Morton To: Christopher Swingley Cc: linux-kernel@vger.kernel.org Subject: Re: 2.6.0-test4: Unable to handle kernel NULL pointer dereference Message-Id: <20030828131019.69a9f3b9.akpm@osdl.org> In-Reply-To: <20030828153448.GA1001@iarc.uaf.edu> References: <20030828153448.GA1001@iarc.uaf.edu> X-Mailer: Sylpheed version 0.9.4 (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: 1072 Lines: 32 Christopher Swingley wrote: > > kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000000 > ... > kernel: EIP is at find_inode_fast+0x1a/0x60 > ... > model name : AMD Athlon(tm) XP 1800+ > ... You've been bitten by the athlon-prefetch(0)-goes-oops problem. Nobody seems to be working this, so I'll be sending the below in to Linus. --- 25/include/asm-i386/processor.h~disable-athlon-prefetch 2003-08-23 13:48:16.000000000 -0700 +++ 25-akpm/include/asm-i386/processor.h 2003-08-23 13:48:16.000000000 -0700 @@ -578,6 +578,8 @@ static inline void rep_nop(void) #define ARCH_HAS_PREFETCH extern inline void prefetch(const void *x) { + if (cpu_data[0].x86_vendor == X86_VENDOR_AMD) + return; alternative_input(ASM_NOP4, "prefetchnta (%1)", X86_FEATURE_XMM, _ - 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/