On Wednesday 18 April 2007 11:08, Randy Dunlap wrote: > On Wed, 18 Apr 2007 12:21:37 +0200 Andi Kleen wrote: > > > > > First it was documented twice. > > acpi_dbg_layer and > acpi_dbg_level are different. Note that debug_level and debug_layer are available in sysfs and are self_documenting. (though in looking at it, I think it is incorrect for sysfs to use debug_level and debug_layer instead of acpi_dbg_level and acpi_dbg_layer, which would match the actual name of the kernel boot parameters) -Len lenb@nx6325:~> cat /sys/module/acpi/parameters/debug_level Description Hex SET ACPI_LV_ERROR 0x00000001 [*] ACPI_LV_WARN 0x00000002 [*] ACPI_LV_INIT 0x00000004 [*] ACPI_LV_DEBUG_OBJECT 0x00000008 [*] ACPI_LV_INFO 0x00000010 [ ] ACPI_LV_INIT_NAMES 0x00000020 [ ] ACPI_LV_PARSE 0x00000040 [ ] ACPI_LV_LOAD 0x00000080 [ ] ACPI_LV_DISPATCH 0x00000100 [ ] ACPI_LV_EXEC 0x00000200 [ ] ACPI_LV_NAMES 0x00000400 [ ] ACPI_LV_OPREGION 0x00000800 [ ] ACPI_LV_BFIELD 0x00001000 [ ] ACPI_LV_TABLES 0x00002000 [ ] ACPI_LV_VALUES 0x00004000 [ ] ACPI_LV_OBJECTS 0x00008000 [ ] ACPI_LV_RESOURCES 0x00010000 [ ] ACPI_LV_USER_REQUESTS 0x00020000 [ ] ACPI_LV_PACKAGE 0x00040000 [ ] ACPI_LV_ALLOCATIONS 0x00100000 [ ] ACPI_LV_FUNCTIONS 0x00200000 [ ] ACPI_LV_OPTIMIZATIONS 0x00400000 [ ] ACPI_LV_MUTEX 0x01000000 [ ] ACPI_LV_THREADS 0x02000000 [ ] ACPI_LV_IO 0x04000000 [ ] ACPI_LV_INTERRUPTS 0x08000000 [ ] ACPI_LV_AML_DISASSEMBLE 0x10000000 [ ] ACPI_LV_VERBOSE_INFO 0x20000000 [ ] ACPI_LV_FULL_TABLES 0x40000000 [ ] ACPI_LV_EVENTS 0x80000000 [ ] -- debug_level = 0x0000000F (* = enabled) lenb@nx6325:~> cat /sys/module/acpi/parameters/debug_layer Description Hex SET ACPI_UTILITIES 0x00000001 [*] ACPI_HARDWARE 0x00000002 [*] ACPI_EVENTS 0x00000004 [*] ACPI_TABLES 0x00000008 [*] ACPI_NAMESPACE 0x00000010 [*] ACPI_PARSER 0x00000020 [*] ACPI_DISPATCHER 0x00000040 [*] ACPI_EXECUTER 0x00000080 [*] ACPI_RESOURCES 0x00000100 [*] ACPI_CA_DEBUGGER 0x00000200 [*] ACPI_OS_SERVICES 0x00000400 [*] ACPI_CA_DISASSEMBLER 0x00000800 [*] ACPI_COMPILER 0x00001000 [*] ACPI_TOOLS 0x00002000 [*] ACPI_ALL_DRIVERS 0xFFFF0000 [*] -- debug_layer = 0xFFFF3FFF ( * = enabled) > But the added text is Good. > > > Since this is a fairly important option document it properly. > > I kept myself looking for this information again and again. > > > > In particular the individual bits are fairly important. And add some > > warnings. > > > > Signed-off-by: Andi Kleen <ak@xxxxxxx> > > > > Index: linux/Documentation/kernel-parameters.txt > > =================================================================== > > --- linux.orig/Documentation/kernel-parameters.txt > > +++ linux/Documentation/kernel-parameters.txt > > @@ -187,13 +187,16 @@ and is between 256 and 4096 characters. > > 1: enable, 0: disable. It is useful for boot time > > debugging. After system has booted up, it can be set > > via /proc/acpi/debug_layer. > > - > > - acpi_dbg_level= [HW,ACPI] > > - Format: <int> > > - Each bit of the <int> indicates an ACPI debug level, > > - 1: enable, 0: disable. It is useful for boot time > > - debugging. After system has booted up, it can be set > > - via /proc/acpi/debug_level. > > + CONFIG_ACPI_DEBUG must be enabled for this to produce any output. > > + Available bits (add the numbers together) to enable debug output > > + for specific parts of the ACPI subsystem: > > + 1 utilities 2 hardware 4 events 8 tables > > + 0x10 namespace 0x20 parser 0x40 dispatcher > > + 0x80 executer 0x100 resources 0x200 debugger > > + 0x400 os services > > + 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 > > > > > --- > ~Randy > *** Remember to use Documentation/SubmitChecklist when testing your code *** > - > To unsubscribe from this list: send the line "unsubscribe linux-acpi" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
