redonkable/alistair23-linux
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[PATCH] x86_64: x86_64 add crashdump trigger points

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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 <vgoyal@in.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Vivek Goyal 2006-04-18 12:35:13 +02:00 committed by Linus Torvalds
parent 87cb23a48c
commit 8bcc5280e6
1 changed files with 5 additions and 0 deletions
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5
arch/x86_64/kernel/traps.c
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@ -30,6 +30,7 @@
#include <linux/moduleparam.h>
#include <linux/nmi.h>
#include <linux/kprobes.h>
#include <linux/kexec.h>
#include <asm/system.h>
#include <asm/uaccess.h>
@ -433,6 +434,8 @@ void __kprobes __die(const char * str, struct pt_regs * regs, long err)
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 pt_regs *regs)
*/
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");