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authorLen Brown <len.brown@intel.com>2007-03-11 03:26:14 -0400
committerLen Brown <len.brown@intel.com>2007-03-11 03:30:13 -0400
commita1fdcc0d2714b6622e3fd5c00db1635213d6c41a (patch)
treebf1176f07ff83eebb41d1a292a62124680b81949 /Documentation
parentbe521466feb3bb1cd89de82a2b1d080e9ebd3cb6 (diff)
downloadop-kernel-dev-a1fdcc0d2714b6622e3fd5c00db1635213d6c41a.zip
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ACPI: Add support to parse 2nd MADT
When a BIOS bug presents multiple APIC/MADTs, Linux currently uses the 1st and ignores the 2nd. But some machines work better if we use the 2nd. http://bugzilla.kernel.org/show_bug.cgi?id=7465 Add a warning and boot parameter "acpi_apic_instance=2" to allow parsing the 2nd. No change to default behaviour in this patch. Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/kernel-parameters.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 856c8b1..22c6b8c 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -138,6 +138,12 @@ and is between 256 and 4096 characters. It is defined in the file
See also Documentation/pm.txt, pci=noacpi
+ acpi_apic_instance= [ACPI, IOAPIC]
+ Format: <int>
+ 2: use 2nd APIC table, if available
+ 1,0: use 1st APIC table
+ default: 0
+
acpi_sleep= [HW,ACPI] Sleep options
Format: { s3_bios, s3_mode }
See Documentation/power/video.txt
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