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authorMandeep Singh Baines <msb@chromium.org>2011-03-23 02:34:23 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-23 03:44:13 +0300
commit5af5bcb8d37f99ba415a1adc6da71051b84f93a5 (patch)
tree58ae14d126ef40cbc5a91538cfe04433d26510ae
parent9f36e2c448007b54851e7e4fa48da97d1477a175 (diff)
downloadlinux-5af5bcb8d37f99ba415a1adc6da71051b84f93a5.tar.xz
printk: allow setting DEFAULT_MESSAGE_LEVEL via Kconfig
We've been burned by regressions/bugs which we later realized could have been triaged quicker if only we'd paid closer attention to dmesg. To make it easier to audit dmesg, we'd like to make DEFAULT_MESSAGE_LEVEL Kconfig-settable. That way we can set it to KERN_NOTICE and audit any messages <= KERN_WARNING. Signed-off-by: Mandeep Singh Baines <msb@chromium.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Joe Perches <joe@perches.com> Cc: Olof Johansson <olofj@chromium.org> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--kernel/printk.c2
-rw-r--r--lib/Kconfig.debug11
2 files changed, 12 insertions, 1 deletions
diff --git a/kernel/printk.c b/kernel/printk.c
index a53607eea6d0..da8ca817eae3 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -53,7 +53,7 @@ void asmlinkage __attribute__((weak)) early_printk(const char *fmt, ...)
#define __LOG_BUF_LEN (1 << CONFIG_LOG_BUF_SHIFT)
/* printk's without a loglevel use this.. */
-#define DEFAULT_MESSAGE_LOGLEVEL 4 /* KERN_WARNING */
+#define DEFAULT_MESSAGE_LOGLEVEL CONFIG_DEFAULT_MESSAGE_LOGLEVEL
/* We show everything that is MORE important than this.. */
#define MINIMUM_CONSOLE_LOGLEVEL 1 /* Minimum loglevel we let people use */
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index fb0afeff9436..bef5faab660f 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -9,6 +9,17 @@ config PRINTK_TIME
operations. This is useful for identifying long delays
in kernel startup.
+config DEFAULT_MESSAGE_LOGLEVEL
+ int "Default message log level (1-7)"
+ range 1 7
+ default "4"
+ help
+ Default log level for printk statements with no specified priority.
+
+ This was hard-coded to KERN_WARNING since at least 2.6.10 but folks
+ that are auditing their logs closely may want to set it to a lower
+ priority.
+
config ENABLE_WARN_DEPRECATED
bool "Enable __deprecated logic"
default y