update LOG BUF SIZE config.
PATCH 1/1 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 renamed from init/Kconfig%LGBUF +14 -43
@@ -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 endmenu