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dynamic debug: combine dprintk and dynamic printk

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This patch combines Greg Bank's dprintk() work with the existing dynamic
printk patchset, we are now calling it 'dynamic debug'.

The new feature of this patchset is a richer /debugfs control file interface,
(an example output from my system is at the bottom), which allows fined grained
control over the the debug output. The output can be controlled by function,
file, module, format string, and line number.

for example, enabled all debug messages in module 'nf_conntrack':

echo -n 'module nf_conntrack +p' > /mnt/debugfs/dynamic_debug/control

to disable them:

echo -n 'module nf_conntrack -p' > /mnt/debugfs/dynamic_debug/control

A further explanation can be found in the documentation patch.

Signed-off-by: Greg Banks <gnb@sgi.com>
Signed-off-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jason Baron
2009-02-05 11:51:38 -05:00
committed by Greg Kroah-Hartman
parent 095160aee9
commit e9d376f0fa
13 changed files with 867 additions and 543 deletions
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4
include/linux/kernel.h
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@ -16,7 +16,7 @@
#include <linux/log2.h>
#include <linux/typecheck.h>
#include <linux/ratelimit.h>
#include <linux/dynamic_printk.h>
#include <linux/dynamic_debug.h>
#include <asm/byteorder.h>
#include <asm/bug.h>
@ -358,7 +358,7 @@ static inline char *pack_hex_byte(char *buf, u8 byte)
#if defined(DEBUG)
#define pr_debug(fmt, ...) \
printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
#elif defined(CONFIG_DYNAMIC_PRINTK_DEBUG)
#elif defined(CONFIG_DYNAMIC_DEBUG)
#define pr_debug(fmt, ...) do { \
dynamic_pr_debug(pr_fmt(fmt), ##__VA_ARGS__); \
} while (0)