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authorRich Johnston <rjohnston@sgi.com>2013-03-27 18:26:49 +0400
committerBen Myers <bpm@sgi.com>2013-04-03 22:20:39 +0400
commit3d6e036193bfa67a8a1cc1908fe910c7a014d183 (patch)
treee48b9f00a87d1188fd8537d51efd70854f5c8683
parentff9a28f6c25d18a635abcab1f49db68108203dfb (diff)
downloadlinux-3d6e036193bfa67a8a1cc1908fe910c7a014d183.tar.xz
xfs: Add ratelimited printk for different alert levels
Ratelimited printk will be useful in printing xfs messages which are otherwise not required to be printed always due to their high rate (to prevent kernel ring buffer from overflowing), while at the same time required to be printed. Signed-off-by: Raghavendra D Prabhu <rprabhu@wnohang.net> Reviewed-by: Rich Johnston <rjohnston@sgi.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Ben Myers <bpm@sgi.com>
-rw-r--r--fs/xfs/xfs_linux.h1
-rw-r--r--fs/xfs/xfs_message.h26
2 files changed, 27 insertions, 0 deletions
diff --git a/fs/xfs/xfs_linux.h b/fs/xfs/xfs_linux.h
index fe7e4df85a7b..14e59d953b7b 100644
--- a/fs/xfs/xfs_linux.h
+++ b/fs/xfs/xfs_linux.h
@@ -72,6 +72,7 @@
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/list_sort.h>
+#include <linux/ratelimit.h>
#include <asm/page.h>
#include <asm/div64.h>
diff --git a/fs/xfs/xfs_message.h b/fs/xfs/xfs_message.h
index 56dc0c17f16a..76c81982f964 100644
--- a/fs/xfs/xfs_message.h
+++ b/fs/xfs/xfs_message.h
@@ -30,6 +30,32 @@ void xfs_debug(const struct xfs_mount *mp, const char *fmt, ...)
}
#endif
+#define xfs_printk_ratelimited(func, dev, fmt, ...) \
+do { \
+ static DEFINE_RATELIMIT_STATE(_rs, \
+ DEFAULT_RATELIMIT_INTERVAL, \
+ DEFAULT_RATELIMIT_BURST); \
+ if (__ratelimit(&_rs)) \
+ func(dev, fmt, ##__VA_ARGS__); \
+} while (0)
+
+#define xfs_emerg_ratelimited(dev, fmt, ...) \
+ xfs_printk_ratelimited(xfs_emerg, dev, fmt, ##__VA_ARGS__)
+#define xfs_alert_ratelimited(dev, fmt, ...) \
+ xfs_printk_ratelimited(xfs_alert, dev, fmt, ##__VA_ARGS__)
+#define xfs_crit_ratelimited(dev, fmt, ...) \
+ xfs_printk_ratelimited(xfs_crit, dev, fmt, ##__VA_ARGS__)
+#define xfs_err_ratelimited(dev, fmt, ...) \
+ xfs_printk_ratelimited(xfs_err, dev, fmt, ##__VA_ARGS__)
+#define xfs_warn_ratelimited(dev, fmt, ...) \
+ xfs_printk_ratelimited(xfs_warn, dev, fmt, ##__VA_ARGS__)
+#define xfs_notice_ratelimited(dev, fmt, ...) \
+ xfs_printk_ratelimited(xfs_notice, dev, fmt, ##__VA_ARGS__)
+#define xfs_info_ratelimited(dev, fmt, ...) \
+ xfs_printk_ratelimited(xfs_info, dev, fmt, ##__VA_ARGS__)
+#define xfs_debug_ratelimited(dev, fmt, ...) \
+ xfs_printk_ratelimited(xfs_debug, dev, fmt, ##__VA_ARGS__)
+
extern void assfail(char *expr, char *f, int l);
extern void xfs_hex_dump(void *p, int length);