[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: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -30,6 +30,7 @@
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#include <linux/moduleparam.h>
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#include <linux/nmi.h>
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#include <linux/kprobes.h>
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#include <linux/kexec.h>
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#include <asm/system.h>
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#include <asm/uaccess.h>
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@ -433,6 +434,8 @@ void __kprobes __die(const char * str, struct pt_regs * regs, long err)
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printk(KERN_ALERT "RIP ");
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printk_address(regs->rip);
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printk(" RSP <%016lx>\n", regs->rsp);
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if (kexec_should_crash(current))
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crash_kexec(regs);
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}
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void die(const char * str, struct pt_regs * regs, long err)
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@ -455,6 +458,8 @@ void __kprobes die_nmi(char *str, struct pt_regs *regs)
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*/
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printk(str, safe_smp_processor_id());
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show_registers(regs);
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if (kexec_should_crash(current))
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crash_kexec(regs);
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if (panic_on_timeout || panic_on_oops)
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panic("nmi watchdog");
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printk("console shuts up ...\n");
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