linux-kernel - [2.6.23 PATCH 12/18] dm: add ratelimit logging macros

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Date:	Wed, 11 Jul 2007 22:01:20 +0100
From:	Alasdair G Kergon <agk@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	dm-devel@...hat.com, linux-kernel@...r.kernel.org,
	Jonathan Brassow <jbrassow@...hat.com>
Subject: [2.6.23 PATCH 12/18] dm: add ratelimit logging macros

From: Jonathan Brassow <jbrassow@...hat.com>

Add ratelimit extension to dm logging macros.

Signed-off-by: Jonathan Brassow <jbrassow@...hat.com>
Signed-off-by: Alasdair G Kergon <agk@...hat.com>

---
 drivers/md/dm.h |   40 ++++++++++++++++++++++++++++++++++++----
 1 files changed, 36 insertions(+), 4 deletions(-)

Index: linux/drivers/md/dm.h
===================================================================
--- linux.orig/drivers/md/dm.h	2007-07-11 21:37:31.000000000 +0100
+++ linux/drivers/md/dm.h	2007-07-11 21:37:49.000000000 +0100
@@ -18,13 +18,45 @@
 
 #define DM_NAME "device-mapper"
 
-#define DMERR(f, arg...) printk(KERN_ERR DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
-#define DMWARN(f, arg...) printk(KERN_WARNING DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
-#define DMINFO(f, arg...) printk(KERN_INFO DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
+#define DMERR(f, arg...) \
+	printk(KERN_ERR DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
+#define DMERR_LIMIT(f, arg...) \
+	do { \
+		if (printk_ratelimit())	\
+			printk(KERN_ERR DM_NAME ": " DM_MSG_PREFIX ": " \
+			       f "\n", ## arg); \
+	} while (0)
+
+#define DMWARN(f, arg...) \
+	printk(KERN_WARNING DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
+#define DMWARN_LIMIT(f, arg...) \
+	do { \
+		if (printk_ratelimit())	\
+			printk(KERN_WARNING DM_NAME ": " DM_MSG_PREFIX ": " \
+			       f "\n", ## arg); \
+	} while (0)
+
+#define DMINFO(f, arg...) \
+	printk(KERN_INFO DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
+#define DMINFO_LIMIT(f, arg...) \
+	do { \
+		if (printk_ratelimit())	\
+			printk(KERN_INFO DM_NAME ": " DM_MSG_PREFIX ": " f \
+			       "\n", ## arg); \
+	} while (0)
+
 #ifdef CONFIG_DM_DEBUG
-#  define DMDEBUG(f, arg...) printk(KERN_DEBUG DM_NAME ": " DM_MSG_PREFIX " DEBUG: " f "\n", ## arg)
+#  define DMDEBUG(f, arg...) \
+	printk(KERN_DEBUG DM_NAME ": " DM_MSG_PREFIX " DEBUG: " f "\n", ## arg)
+#  define DMDEBUG_LIMIT(f, arg...) \
+	do { \
+		if (printk_ratelimit())	\
+			printk(KERN_DEBUG DM_NAME ": " DM_MSG_PREFIX ": " f \
+			       "\n", ## arg); \
+	} while (0)
 #else
 #  define DMDEBUG(f, arg...) do {} while (0)
+#  define DMDEBUG_LIMIT(f, arg...) do {} while (0)
 #endif
 
 #define DMEMIT(x...) sz += ((sz >= maxlen) ? \
-
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