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Subject[PATCH -next] Documentation: Explain the [KMG] parameters suffix
(Also applicable over 2.6.38-rc3)

The '[KMG]' suffix is commonly described after a number of kernel
parameter values documentation. Explicitly state its semantics.

Signed-off-by: Ahmed S. Darwish <>

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 89835a4..3deedce 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -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.

+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


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