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dm: use local printk ratelimit

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printk_ratelimit() shares global ratelimiting state with all
other subsystems, so its usage is discouraged. Instead,
define and use dm's local state.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Namhyung Kim 2011-10-31 20:18:54 +00:00 committed by Alasdair G Kergon
parent 4693c9668f
commit 71a16736a1
2 changed files with 23 additions and 4 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

10
drivers/md/dm.c
View file

@ -25,6 +25,16 @@
#define DM_MSG_PREFIX "core"
#ifdef CONFIG_PRINTK
/*
* ratelimit state to be used in DMXXX_LIMIT().
*/
DEFINE_RATELIMIT_STATE(dm_ratelimit_state,
DEFAULT_RATELIMIT_INTERVAL,
DEFAULT_RATELIMIT_BURST);
EXPORT_SYMBOL(dm_ratelimit_state);
#endif
/*
* Cookies are numeric values sent with CHANGE and REMOVE
* uevents while resuming, removing or renaming the device.

17
include/linux/device-mapper.h
View file

@ -10,6 +10,7 @@
#include <linux/bio.h>
#include <linux/blkdev.h>
#include <linux/ratelimit.h>
struct dm_dev;
struct dm_target;
@ -375,6 +376,14 @@ void *dm_vcalloc(unsigned long nmemb, unsigned long elem_size);
*---------------------------------------------------------------*/
#define DM_NAME "device-mapper"
#ifdef CONFIG_PRINTK
extern struct ratelimit_state dm_ratelimit_state;
#define dm_ratelimit() __ratelimit(&dm_ratelimit_state)
#else
#define dm_ratelimit() 0
#endif
#define DMCRIT(f, arg...) \
printk(KERN_CRIT DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
@ -382,7 +391,7 @@ void *dm_vcalloc(unsigned long nmemb, unsigned long elem_size);
printk(KERN_ERR DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
#define DMERR_LIMIT(f, arg...) \
do { \
if (printk_ratelimit()) \
if (dm_ratelimit()) \
printk(KERN_ERR DM_NAME ": " DM_MSG_PREFIX ": " \
f "\n", ## arg); \
} while (0)
@ -391,7 +400,7 @@ void *dm_vcalloc(unsigned long nmemb, unsigned long elem_size);
printk(KERN_WARNING DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
#define DMWARN_LIMIT(f, arg...) \
do { \
if (printk_ratelimit()) \
if (dm_ratelimit()) \
printk(KERN_WARNING DM_NAME ": " DM_MSG_PREFIX ": " \
f "\n", ## arg); \
} while (0)
@ -400,7 +409,7 @@ void *dm_vcalloc(unsigned long nmemb, unsigned long elem_size);
printk(KERN_INFO DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
#define DMINFO_LIMIT(f, arg...) \
do { \
if (printk_ratelimit()) \
if (dm_ratelimit()) \
printk(KERN_INFO DM_NAME ": " DM_MSG_PREFIX ": " f \
"\n", ## arg); \
} while (0)
@ -410,7 +419,7 @@ void *dm_vcalloc(unsigned long nmemb, unsigned long elem_size);
printk(KERN_DEBUG DM_NAME ": " DM_MSG_PREFIX " DEBUG: " f "\n", ## arg)
# define DMDEBUG_LIMIT(f, arg...) \
do { \
if (printk_ratelimit()) \
if (dm_ratelimit()) \
printk(KERN_DEBUG DM_NAME ": " DM_MSG_PREFIX ": " f \
"\n", ## arg); \
} while (0)