[PATCH] (v3) move LOG_BUF_SIZE to header/config

Randy.Dunlap (rddunlap@osdl.org)
Tue, 17 Dec 2002 14:33:55 -0800 (PST)


Changes from yesterday:

a. use a shift value (suggested by HCH); probably still not as quite
as free and open as he suggested, but I had user-friendliness
problems with that.

b. allow a wider range of values (HCH and James Cloos):
smaller added, larger can be added as needed.

c. put common config into kernel/Kconfig and include that in each
arch/*/Kconfig

More comments?

-- 
~Randy

patch_name: logbuf-config-2552.patch patch_version: 2002.12.17 author: Randy Dunlap <rddunlap@osdl.org> description: change LOG_BUF_SIZE to a config option (LOG_BUF_SHIFT) product: linux product_versions: 2.5.52 changelog: (a) move to a common kernel/Kconfig; (b) use a SHIFT value (enforces power of 2, gives more choices) URL: requires: kconfig in 2.5.52 conflicts: diffstat: arch/alpha/Kconfig | 2 + arch/arm/Kconfig | 2 + arch/cris/Kconfig | 2 + arch/ia64/Kconfig | 3 ++ arch/m68k/Kconfig | 2 + arch/m68knommu/Kconfig | 2 + arch/mips/Kconfig | 2 + arch/mips64/Kconfig | 2 + arch/parisc/Kconfig | 2 + arch/ppc/Kconfig | 2 + arch/ppc64/Kconfig | 2 + arch/s390/Kconfig | 2 + arch/s390x/Kconfig | 2 + arch/sh/Kconfig | 2 + arch/sparc/Kconfig | 2 + arch/sparc64/Kconfig | 2 + arch/um/Kconfig | 2 + arch/v850/Kconfig | 2 + arch/x86_64/Kconfig | 2 + kernel/Kconfig | 55 +++++++++++++++++++++++++++++++++++++++++++++++++ kernel/printk.c | 11 --------- 21 files changed, 95 insertions(+), 10 deletions(-)

--- ./arch/m68k/Kconfig%LOGBUF Sun Dec 15 18:08:11 2002 +++ ./arch/m68k/Kconfig Tue Dec 17 14:08:33 2002 @@ -2346,3 +2346,5 @@

source "lib/Kconfig"

+source "kernel/Kconfig" + --- ./arch/sparc/Kconfig%LOGBUF Sun Dec 15 18:07:42 2002 +++ ./arch/sparc/Kconfig Tue Dec 17 14:11:06 2002 @@ -1422,3 +1422,5 @@

source "lib/Kconfig"

+source "kernel/Kconfig" + --- ./arch/sparc64/Kconfig%LOGBUF Sun Dec 15 18:08:16 2002 +++ ./arch/sparc64/Kconfig Tue Dec 17 14:11:13 2002 @@ -1710,3 +1710,5 @@

source "lib/Kconfig"

+source "kernel/Kconfig" + --- ./arch/ppc/Kconfig%LOGBUF Sun Dec 15 18:08:23 2002 +++ ./arch/ppc/Kconfig Tue Dec 17 14:10:18 2002 @@ -1872,3 +1872,5 @@

source "crypto/Kconfig"

+source "kernel/Kconfig" + --- ./arch/m68knommu/Kconfig%LOGBUF Sun Dec 15 18:08:13 2002 +++ ./arch/m68knommu/Kconfig Tue Dec 17 14:08:52 2002 @@ -759,3 +759,5 @@

source "lib/Kconfig"

+source "kernel/Kconfig" + --- ./arch/alpha/Kconfig%LOGBUF Sun Dec 15 18:08:14 2002 +++ ./arch/alpha/Kconfig Tue Dec 17 14:07:34 2002 @@ -1030,3 +1030,5 @@

source "lib/Kconfig"

+source "kernel/Kconfig" + --- ./arch/cris/Kconfig%LOGBUF Sun Dec 15 18:08:19 2002 +++ ./arch/cris/Kconfig Tue Dec 17 14:08:06 2002 @@ -759,3 +759,5 @@

source "lib/Kconfig"

+source "kernel/Kconfig" + --- ./arch/mips/Kconfig%LOGBUF Sun Dec 15 18:07:56 2002 +++ ./arch/mips/Kconfig Tue Dec 17 14:08:59 2002 @@ -1284,3 +1284,5 @@

source "lib/Kconfig"

+source "kernel/Kconfig" + --- ./arch/x86_64/Kconfig%LOGBUF Sun Dec 15 18:08:14 2002 +++ ./arch/x86_64/Kconfig Tue Dec 17 14:11:54 2002 @@ -700,3 +700,5 @@

source "lib/Kconfig"

+source "kernel/Kconfig" + --- ./arch/ppc64/Kconfig%LOGBUF Sun Dec 15 18:08:09 2002 +++ ./arch/ppc64/Kconfig Tue Dec 17 14:10:25 2002 @@ -559,3 +559,5 @@

source "lib/Kconfig"

+source "kernel/Kconfig" + --- ./arch/um/Kconfig%LOGBUF Sun Dec 15 18:07:57 2002 +++ ./arch/um/Kconfig Tue Dec 17 14:11:35 2002 @@ -171,3 +171,5 @@

endmenu

+source "kernel/Kconfig" + --- ./arch/arm/Kconfig%LOGBUF Sun Dec 15 18:08:09 2002 +++ ./arch/arm/Kconfig Tue Dec 17 14:07:56 2002 @@ -1228,3 +1228,5 @@

source "lib/Kconfig"

+source "kernel/Kconfig" + --- ./arch/parisc/Kconfig%LOGBUF Sun Dec 15 18:08:11 2002 +++ ./arch/parisc/Kconfig Tue Dec 17 14:10:11 2002 @@ -423,3 +423,5 @@

source "lib/Kconfig"

+source "kernel/Kconfig" + --- ./arch/ia64/Kconfig%LOGBUF Sun Dec 15 18:08:21 2002 +++ ./arch/ia64/Kconfig Tue Dec 17 14:08:24 2002 @@ -891,3 +891,6 @@ source "security/Kconfig"

source "crypto/Kconfig" + +source "kernel/Kconfig" + --- ./arch/mips64/Kconfig%LOGBUF Sun Dec 15 18:07:52 2002 +++ ./arch/mips64/Kconfig Tue Dec 17 14:09:07 2002 @@ -727,3 +727,5 @@

source "lib/Kconfig"

+source "kernel/Kconfig" + --- ./arch/s390x/Kconfig%LOGBUF Sun Dec 15 18:07:59 2002 +++ ./arch/s390x/Kconfig Tue Dec 17 14:10:41 2002 @@ -346,3 +346,5 @@

source "lib/Kconfig"

+source "kernel/Kconfig" + --- ./arch/v850/Kconfig%LOGBUF Sun Dec 15 18:07:56 2002 +++ ./arch/v850/Kconfig Tue Dec 17 14:11:46 2002 @@ -452,4 +452,6 @@

source "lib/Kconfig"

+source "kernel/Kconfig" + ############################################################################# --- ./arch/sh/Kconfig%LOGBUF Sun Dec 15 18:08:23 2002 +++ ./arch/sh/Kconfig Tue Dec 17 14:10:52 2002 @@ -1276,3 +1276,5 @@

source "lib/Kconfig"

+source "kernel/Kconfig" + --- ./arch/s390/Kconfig%LOGBUF Sun Dec 15 18:07:54 2002 +++ ./arch/s390/Kconfig Tue Dec 17 14:10:33 2002 @@ -337,3 +337,5 @@

source "lib/Kconfig"

+source "kernel/Kconfig" + --- ./kernel/Kconfig%LOGBUF Tue Dec 17 14:00:31 2002 +++ ./kernel/Kconfig Tue Dec 17 14:16:36 2002 @@ -0,0 +1,55 @@ +# This general setup config file is read _after_ all other config files. +# It is for generic kernel options that cannot be handled elsewhere, +# including some generic options that are processor-dependent. +# This is also _not_ for device driver options. +# They should be handled in their driver subsystem areas. + +menu "Common kernel setup (more)" + +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 + +endmenu + --- ./kernel/printk.c%LOGBUF Sun Dec 15 18:08:24 2002 +++ ./kernel/printk.c Tue Dec 17 14:01:50 2002 @@ -30,16 +30,7 @@

#include <asm/uaccess.h>

-#if defined(CONFIG_X86_NUMAQ) || defined(CONFIG_IA64) -#define LOG_BUF_LEN (65536) -#elif defined(CONFIG_ARCH_S390) -#define LOG_BUF_LEN (131072) -#elif defined(CONFIG_SMP) -#define LOG_BUF_LEN (32768) -#else -#define LOG_BUF_LEN (16384) /* This must be a power of two */ -#endif - +#define LOG_BUF_LEN (1 << CONFIG_LOG_BUF_SHIFT) #define LOG_BUF_MASK (LOG_BUF_LEN-1)

#ifndef arch_consoles_callable

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