Documentation: explain [KMG] parameter suffix

[mv-sheeva.git] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index b72e071a3e5bd1ca958c423df347d7b1ab515573..66771a34f1858171d3823521f183051c9562a26e 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -43,11 +43,11 @@ parameter is applicable:
        AVR32   AVR32 architecture is enabled.
        AX25    Appropriate AX.25 support is enabled.
        BLACKFIN Blackfin architecture is enabled.
        AVR32   AVR32 architecture is enabled.
        AX25    Appropriate AX.25 support is enabled.
        BLACKFIN Blackfin architecture is enabled.

+       DRM     Direct Rendering Management support is enabled.
+       DYNAMIC_DEBUG Build in debug messages and enable them at runtime

        EDD     BIOS Enhanced Disk Drive Services (EDD) is enabled
        EFI     EFI Partitioning (GPT) is enabled
        EIDE    EIDE/ATAPI support is enabled.
        EDD     BIOS Enhanced Disk Drive Services (EDD) is enabled
        EFI     EFI Partitioning (GPT) is enabled
        EIDE    EIDE/ATAPI support is enabled.

-       DRM     Direct Rendering Management support is enabled.
-       DYNAMIC_DEBUG Build in debug messages and enable them at runtime

        FB      The frame buffer device is enabled.
        GCOV    GCOV profiling is enabled.
        HW      Appropriate hardware is enabled.
        FB      The frame buffer device is enabled.
        GCOV    GCOV profiling is enabled.
        HW      Appropriate hardware is enabled.


@@ -144,6 +144,11 @@ a fixed number of characters. This limit depends on the architecture
 and is between 256 and 4096 characters. It is defined in the file
 ./include/asm/setup.h as COMMAND_LINE_SIZE.
 
 and is between 256 and 4096 characters. It is defined in the file
 ./include/asm/setup.h as COMMAND_LINE_SIZE.
 

+Finally, the [KMG] suffix is commonly described after a number of kernel
+parameter values. These 'K', 'M', and 'G' letters represent the _binary_
+multipliers 'Kilo', 'Mega', and 'Giga', equalling 2^10, 2^20, and 2^30
+bytes respectively. Such letter suffixes can also be entirely omitted.
+

 
        acpi=           [HW,ACPI,X86]
                        Advanced Configuration and Power Interface
 
        acpi=           [HW,ACPI,X86]
                        Advanced Configuration and Power Interface


@@ -545,16 +550,20 @@ and is between 256 and 4096 characters. It is defined in the file
                        Format:
                        <first_slot>,<last_slot>,<port>,<enum_bit>[,<debug>]
 
                        Format:
                        <first_slot>,<last_slot>,<port>,<enum_bit>[,<debug>]
 

-       crashkernel=nn[KMG]@ss[KMG]
-                       [KNL] Reserve a chunk of physical memory to
-                       hold a kernel to switch to with kexec on panic.
+       crashkernel=size[KMG][@offset[KMG]]
+                       [KNL] Using kexec, Linux can switch to a 'crash kernel'
+                       upon panic. This parameter reserves the physical
+                       memory region [offset, offset + size] for that kernel
+                       image. If '@offset' is omitted, then a suitable offset
+                       is selected automatically. Check
+                       Documentation/kdump/kdump.txt for further details.

 
        crashkernel=range1:size1[,range2:size2,...][@offset]
                        [KNL] Same as above, but depends on the memory
                        in the running system. The syntax of range is
                        start-[end] where start and end are both
                        a memory unit (amount[KMG]). See also
 
        crashkernel=range1:size1[,range2:size2,...][@offset]
                        [KNL] Same as above, but depends on the memory
                        in the running system. The syntax of range is
                        start-[end] where start and end are both
                        a memory unit (amount[KMG]). See also

-                       Documentation/kdump/kdump.txt for a example.
+                       Documentation/kdump/kdump.txt for an example.

 
        cs89x0_dma=     [HW,NET]
                        Format: <dma>
 
        cs89x0_dma=     [HW,NET]
                        Format: <dma>