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Subject[PATCH] update LOG BUF SIZE config.
Hi,

The current LOG_BUF size is a bit confusing the first
time that "make oldconfig" is used. It's difficult to
select anything other than the default value.

Also, you (Linus) expressed a desire to have this
configurable only if DEBUG_KERNEL or "kernel hacking"
was enabled, so I've changed it to accomplish that.

This patch also uses Kconfig in a way that Roman intended
since a patch in 2.5.52 which enables default values if
a prompt is not enabled, but lets values be chosen when
the prompt is enabled. You also asked for this in setting
this config option.

Please apply to 2.5.58.

Thanks,
~Randy--- ./init/Kconfig%LGBUF Mon Jan 6 16:01:55 2003
+++ ./init/Kconfig Mon Jan 6 16:38:35 2003
@@ -82,50 +82,21 @@
building a kernel for install/rescue disks or your system is very
limited in memory.

-choice
- prompt "Kernel log buffer size"
- default LOG_BUF_SHIFT_17 if ARCH_S390
- default LOG_BUF_SHIFT_16 if X86_NUMAQ || IA64
- default LOG_BUF_SHIFT_15 if SMP
- default LOG_BUF_SHIFT_14
- help
- Select kernel log buffer size from this list (power of 2).
- Defaults: 17 (=> 128 KB for S/390)
- 16 (=> 64 KB for x86 NUMAQ or IA-64)
- 15 (=> 32 KB for SMP)
- 14 (=> 16 KB for uniprocessor)
-
-config LOG_BUF_SHIFT_17
- bool "128 KB"
- default y if ARCH_S390
-
-config LOG_BUF_SHIFT_16
- bool "64 KB"
- default y if X86_NUMAQ || IA64
-
-config LOG_BUF_SHIFT_15
- bool "32 KB"
- default y if SMP
-
-config LOG_BUF_SHIFT_14
- bool "16 KB"
-
-config LOG_BUF_SHIFT_13
- bool "8 KB"
-
-config LOG_BUF_SHIFT_12
- bool "4 KB"
-
-endchoice
-
config LOG_BUF_SHIFT
- int
- default 17 if LOG_BUF_SHIFT_17=y
- default 16 if LOG_BUF_SHIFT_16=y
- default 15 if LOG_BUF_SHIFT_15=y
- default 14 if LOG_BUF_SHIFT_14=y
- default 13 if LOG_BUF_SHIFT_13=y
- default 12 if LOG_BUF_SHIFT_12=y
+ int "Kernel log buffer size" if DEBUG_KERNEL
+ default 17 if ARCH_S390
+ default 16 if X86_NUMAQ || IA64
+ default 15 if SMP
+ default 14
+ help
+ Select kernel log buffer size as a power of 2.
+ Defaults and Examples:
+ 17 => 128 KB for S/390
+ 16 => 64 KB for x86 NUMAQ or IA-64
+ 15 => 32 KB for SMP
+ 14 => 16 KB for uniprocessor
+ 13 => 8 KB
+ 12 => 4 KB

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