From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750808AbWDQTuP (ORCPT ); Mon, 17 Apr 2006 15:50:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750811AbWDQTuP (ORCPT ); Mon, 17 Apr 2006 15:50:15 -0400 Received: from e3.ny.us.ibm.com ([32.97.182.143]:40328 "EHLO e3.ny.us.ibm.com") by vger.kernel.org with ESMTP id S1750808AbWDQTuN (ORCPT ); Mon, 17 Apr 2006 15:50:13 -0400 Date: Mon, 17 Apr 2006 15:49:14 -0400 From: Vivek Goyal To: Andi Kleen Cc: Fastboot mailing list , linux kernel mailing list , Morton Andrew Morton Subject: [PATCH] kdump: x86_64 add crashdump trigger points Message-ID: <20060417194914.GC6576@in.ibm.com> Reply-To: vgoyal@in.ibm.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.11 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, I am reposting this patch as there was no response after I modified the patch based on feedback. Is there a problem with the patch? If yes please let me know, I shall rectify that. We need this patch to trigger the booting of capture kernel if system is hung and die_nmi() hits or some thread oopses and panic_on_oops is set. System starts booting into capture kernel only if it is pre-loaded otherwise normal operation continues and existing functionality is not impacted. o Start booting into the capture kernel after an Oops if system is in a unrecoverable state. System will boot into the capture kernel, if one is pre-loaded by the user, and capture the kernel core dump. o One of the following conditions should be true to trigger the booting of capture kernel. - panic_on_oops is set. - pid of current thread is 0 - pid of current thread is 1 - Oops happened inside interrupt context. Signed-off-by: Vivek Goyal --- arch/x86_64/kernel/traps.c | 5 +++++ 1 file changed, 5 insertions(+) diff -puN arch/x86_64/kernel/traps.c~kdump-x86_64-add-crashdump-trigger-points arch/x86_64/kernel/traps.c --- linux-2.6.17-rc1-1M/arch/x86_64/kernel/traps.c~kdump-x86_64-add-crashdump-trigger-points 2006-04-11 08:37:08.000000000 -0400 +++ linux-2.6.17-rc1-1M-root/arch/x86_64/kernel/traps.c 2006-04-11 09:03:26.000000000 -0400 @@ -30,6 +30,7 @@ #include #include #include +#include #include #include @@ -433,6 +434,8 @@ void __kprobes __die(const char * str, s printk(KERN_ALERT "RIP "); printk_address(regs->rip); printk(" RSP <%016lx>\n", regs->rsp); + if (kexec_should_crash(current)) + crash_kexec(regs); } void die(const char * str, struct pt_regs * regs, long err) @@ -455,6 +458,8 @@ void __kprobes die_nmi(char *str, struct */ printk(str, safe_smp_processor_id()); show_registers(regs); + if (kexec_should_crash(current)) + crash_kexec(regs); if (panic_on_timeout || panic_on_oops) panic("nmi watchdog"); printk("console shuts up ...\n"); _