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Commit f989106c authored by Zhang Rui's avatar Zhang Rui Committed by Len Brown
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ACPI: Improve acpi debug documentation 



Now we use acpi.debug_level and acpi.debug_layer as kernel boot
parameters instead of acpi_dbg_level and acpi_dbg_layer.
Thanks to Andi Kleen for pointing it out.

Signed-off-by: default avatarZhang Rui <rui.zhang@intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent f8993aff

Documentation/kernel-parameters.txt

+27 −5
Original line number Original line Diff line number Diff line
@@ -181,19 +181,41 @@ and is between 256 and 4096 characters. It is defined in the file 
			that require a timer override, but don't have

			that require a timer override, but don't have

			HPET

			HPET





	acpi_dbg_layer=	[HW,ACPI]

	acpi.debug_layer=	[HW,ACPI]

			Format: <int>

			Format: <int>

			Each bit of the <int> indicates an ACPI debug layer,

			Each bit of the <int> indicates an ACPI debug layer,

			1: enable, 0: disable. It is useful for boot time

			1: enable, 0: disable. It is useful for boot time

			debugging. After system has booted up, it can be set

			debugging. After system has booted up, it can be set

			via /proc/acpi/debug_layer.

			via /sys/module/acpi/parameters/debug_layer.



			CONFIG_ACPI_DEBUG must be enabled for this to produce any output.

	acpi_dbg_level=	[HW,ACPI]

			Available bits (add the numbers together) to enable debug output

			for specific parts of the ACPI subsystem:

			0x01 utilities 0x02 hardware 0x04 events 0x08 tables

			0x10 namespace 0x20 parser 0x40 dispatcher

			0x80 executer 0x100 resources 0x200 acpica debugger

			0x400 os services 0x800 acpica disassembler.

			The number can be in decimal or prefixed with 0x in hex.

			Warning: Many of these options can produce a lot of

			output and make your system unusable. Be very careful.



	acpi.debug_level=	[HW,ACPI]

			Format: <int>

			Format: <int>

			Each bit of the <int> indicates an ACPI debug level,

			Each bit of the <int> indicates an ACPI debug level,

			1: enable, 0: disable. It is useful for boot time

			1: enable, 0: disable. It is useful for boot time

			debugging. After system has booted up, it can be set

			debugging. After system has booted up, it can be set

			via /proc/acpi/debug_level.

			via /sys/module/acpi/parameters/debug_level.

			CONFIG_ACPI_DEBUG must be enabled for this to produce any output.

			Available bits (add the numbers together) to enable different

			debug output levels of the ACPI subsystem:

			0x01 error 0x02 warn 0x04 init 0x08 debug object

			0x10 info 0x20 init names 0x40 parse 0x80 load

			0x100 dispatch 0x200 execute 0x400 names 0x800 operation region

			0x1000 bfield 0x2000 tables 0x4000 values 0x8000 objects

			0x10000 resources 0x20000 user requests 0x40000 package.

			The number can be in decimal or prefixed with 0x in hex.

			Warning: Many of these options can produce a lot of

			output and make your system unusable. Be very careful.







	acpi_fake_ecdt	[HW,ACPI] Workaround failure due to BIOS lacking ECDT

	acpi_fake_ecdt	[HW,ACPI] Workaround failure due to BIOS lacking ECDT