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authorAndi Kleen <ak@suse.de>2005-11-05 11:25:54 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-14 22:55:17 -0500
commite583538f077d5f70191670b47a046ba436ec3428 (patch)
tree576298f190ce8a4f321bb84efce2ace41aa12194 /Documentation/x86_64
parentb0bd35e622ffbda2c01dc67a0381c6a18817a29a (diff)
[PATCH] x86_64: Log machine checks from boot on Intel systems
The logging for boot errors was turned off because it was broken on some AMD systems. But give Intel EM64T systems a chance because they are supposed to be correct there. The advantage is that there is a chance to actually log uncorrected machine checks after the reset. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'Documentation/x86_64')
-rw-r--r--Documentation/x86_64/boot-options.txt6
1 files changed, 4 insertions, 2 deletions
diff --git a/Documentation/x86_64/boot-options.txt b/Documentation/x86_64/boot-options.txt
index a83139692cdf..aaabb5883ab8 100644
--- a/Documentation/x86_64/boot-options.txt
+++ b/Documentation/x86_64/boot-options.txt
@@ -7,10 +7,12 @@ Machine check
7 7
8 mce=off disable machine check 8 mce=off disable machine check
9 mce=bootlog Enable logging of machine checks left over from booting. 9 mce=bootlog Enable logging of machine checks left over from booting.
10 Disabled by default because some BIOS leave bogus ones. 10 Disabled by default on AMD because some BIOS leave bogus ones.
11 If your BIOS doesn't do that it's a good idea to enable though 11 If your BIOS doesn't do that it's a good idea to enable though
12 to make sure you log even machine check events that result 12 to make sure you log even machine check events that result
13 in a reboot. 13 in a reboot. On Intel systems it is enabled by default.
14 mce=nobootlog
15 Disable boot machine check logging.
14 mce=tolerancelevel (number) 16 mce=tolerancelevel (number)
15 0: always panic, 1: panic if deadlock possible, 17 0: always panic, 1: panic if deadlock possible,
16 2: try to avoid panic, 3: never panic or exit (for testing) 18 2: try to avoid panic, 3: never panic or exit (for testing)