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| author | Len Brown <len.brown@intel.com> | 2007-03-11 03:26:14 -0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-03-11 03:30:13 -0400 |
| commit | a1fdcc0d2714b6622e3fd5c00db1635213d6c41a (patch) | |
| tree | bf1176f07ff83eebb41d1a292a62124680b81949 /Documentation/kernel-parameters.txt | |
| parent | be521466feb3bb1cd89de82a2b1d080e9ebd3cb6 (diff) | |
| download | lwn-a1fdcc0d2714b6622e3fd5c00db1635213d6c41a.tar.gz lwn-a1fdcc0d2714b6622e3fd5c00db1635213d6c41a.zip | |
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/kernel-parameters.txt')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 856c8b114e71..22c6b8ccaea5 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 |