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authorAndi Kleen <ak@suse.de>2005-09-12 18:49:24 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-12 10:49:57 -0700
commit8c566ef5f3eb5d9daf61d0fa31d82c211f601ba0 (patch)
tree646730e657f27a23b3081fafafe494121e0d8075
parent673242c10d535bfe238d9d8e82ac93432d35b88e (diff)
[PATCH] x86-64: Add command line option to set machine check tolerance level
Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--Documentation/x86_64/boot-options.txt5
-rw-r--r--arch/x86_64/kernel/mce.c4
2 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/x86_64/boot-options.txt b/Documentation/x86_64/boot-options.txt
index 678e8f192db..ffe1c062088 100644
--- a/Documentation/x86_64/boot-options.txt
+++ b/Documentation/x86_64/boot-options.txt
@@ -11,6 +11,11 @@ Machine check
If your BIOS doesn't do that it's a good idea to enable though
to make sure you log even machine check events that result
in a reboot.
+ mce=tolerancelevel (number)
+ 0: always panic, 1: panic if deadlock possible,
+ 2: try to avoid panic, 3: never panic or exit (for testing)
+ default is 1
+ Can be also set using sysfs which is preferable.
nomce (for compatibility with i386): same as mce=off
diff --git a/arch/x86_64/kernel/mce.c b/arch/x86_64/kernel/mce.c
index 87ea8fdd43f..a39a3edf9ed 100644
--- a/arch/x86_64/kernel/mce.c
+++ b/arch/x86_64/kernel/mce.c
@@ -17,6 +17,7 @@
#include <linux/fs.h>
#include <linux/cpu.h>
#include <linux/percpu.h>
+#include <linux/ctype.h>
#include <asm/processor.h>
#include <asm/msr.h>
#include <asm/mce.h>
@@ -489,6 +490,7 @@ static int __init mcheck_disable(char *str)
/* mce=off disables machine check. Note you can reenable it later
using sysfs.
+ mce=TOLERANCELEVEL (number, see above)
mce=bootlog Log MCEs from before booting. Disabled by default to work
around buggy BIOS that leave bogus MCEs. */
static int __init mcheck_enable(char *str)
@@ -499,6 +501,8 @@ static int __init mcheck_enable(char *str)
mce_dont_init = 1;
else if (!strcmp(str, "bootlog"))
mce_bootlog = 1;
+ else if (isdigit(str[0]))
+ get_option(&str, &tolerant);
else
printk("mce= argument %s ignored. Please use /sys", str);
return 0;