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authorBjorn Helgaas <bjorn.helgaas@hp.com>2008-11-13 17:30:13 -0600
committerLen Brown <len.brown@intel.com>2008-12-19 04:38:32 -0500
commite76f42761197dd6e9405e2eeb35932acfede115a (patch)
tree4eb009547442ad0633dd2a288f9e8d7d3fe5b0f9 /Documentation
parent929096fe9ff1f4b3645cf3919527ab47e8d5e17c (diff)
ACPI: fix 2.6.28 acpi.debug_level regression
acpi_early_init() was changed to over-write the cmdline param, making it really inconvenient to set debug flags at boot-time. Also, This sets the default level to "info", which is what all the ACPI drivers use. So to enable messages from drivers, you only have to supply the "layer" (a.k.a. "component"). For non-"info" ACPI core and ACPI interpreter messages, you have to supply both level and layer masks, as before. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/kernel-parameters.txt11
1 files changed, 7 insertions, 4 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index e0f346d201e..c9115c1b672 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -220,14 +220,17 @@ and is between 256 and 4096 characters. It is defined in the file
Bits in debug_level correspond to a level in
ACPI_DEBUG_PRINT statements, e.g.,
ACPI_DEBUG_PRINT((ACPI_DB_INFO, ...
- See Documentation/acpi/debug.txt for more information
- about debug layers and levels.
+ The debug_level mask defaults to "info". See
+ Documentation/acpi/debug.txt for more information about
+ debug layers and levels.
+ Enable processor driver info messages:
+ acpi.debug_layer=0x20000000
+ Enable PCI/PCI interrupt routing info messages:
+ acpi.debug_layer=0x400000
Enable AML "Debug" output, i.e., stores to the Debug
object while interpreting AML:
acpi.debug_layer=0xffffffff acpi.debug_level=0x2
- Enable PCI/PCI interrupt routing info messages:
- acpi.debug_layer=0x400000 acpi.debug_level=0x4
Enable all messages related to ACPI hardware:
acpi.debug_layer=0x2 acpi.debug_level=0xffffffff