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Commit 8bcc5280 authored by Vivek Goyal's avatar Vivek Goyal Committed by Linus Torvalds
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[PATCH] x86_64: x86_64 add crashdump trigger points 



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: default avatarVivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 87cb23a4

arch/x86_64/kernel/traps.c

+5 −0
Original line number Diff line number Diff line
@@ -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");