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| author |   Andi Kleen <ak@suse.de> | 2005-09-12 18:49:24 +0200 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-12 10:49:57 -0700 |
| commit | 8c566ef5f3eb5d9daf61d0fa31d82c211f601ba0 (patch) | |
| tree | 646730e657f27a23b3081fafafe494121e0d8075 | |
| parent | [PATCH] x86-64: Make lockless machine check record passing a bit more robust. (diff) | |
| download | linux-dev-8c566ef5f3eb5d9daf61d0fa31d82c211f601ba0.tar.xz linux-dev-8c566ef5f3eb5d9daf61d0fa31d82c211f601ba0.zip | |
[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.txt | 5 | ||||
| -rw-r--r-- | arch/x86_64/kernel/mce.c | 4 |
2 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/x86_64/boot-options.txt b/Documentation/x86_64/boot-options.txt index 678e8f192db2..ffe1c062088b 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 87ea8fdd43fd..a39a3edf9ed4 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; |