From 32f7451d1c6214169848cfea331e2c9d4067a650 Mon Sep 17 00:00:00 2001 From: "kernel@kyup.com" Date: Mon, 8 Aug 2016 17:14:22 +0300 Subject: [PATCH] ipoib: Make ipoib_warn ratelimited In certain cases it's possible to be flooded by warning messages. To cope with such situations make the ipoib_warn macro be ratelimited. To prevent accidental limiting of legitimate, bursty messages make the limit fairly liberal by allowing up to 100 messages in 10 seconds. Signed-off-by: Nikolay Borisov Signed-off-by: Doug Ledford --- drivers/infiniband/ulp/ipoib/ipoib.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/ulp/ipoib/ipoib.h b/drivers/infiniband/ulp/ipoib/ipoib.h index 4f7d9b48df64..7899167536e3 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib.h +++ b/drivers/infiniband/ulp/ipoib/ipoib.h @@ -771,7 +771,13 @@ static inline void ipoib_unregister_debugfs(void) { } #define ipoib_printk(level, priv, format, arg...) \ printk(level "%s: " format, ((struct ipoib_dev_priv *) priv)->dev->name , ## arg) #define ipoib_warn(priv, format, arg...) \ - ipoib_printk(KERN_WARNING, priv, format , ## arg) +do { \ + static DEFINE_RATELIMIT_STATE(_rs, \ + 10 * HZ /*10 seconds */, \ + 100); \ + if (__ratelimit(&_rs)) \ + ipoib_printk(KERN_WARNING, priv, format , ## arg);\ +} while (0) extern int ipoib_sendq_size; extern int ipoib_recvq_size; -- GitLab