[lkml]   [2001]   [Mar]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: rate limiting error messages
Eli Carter wrote:
> Can someone point me to a "standard way" of doing rate limiting of error
> messages in the kernel?
> TIA,
> Eli
> -----------------------. Rule of Accuracy: When working toward
> Eli Carter | the solution of a problem, it always
> eli.carter(at) `------------------ helps if you know the answer.

Here is how it is done in IA-64 kernel:

static int
within_logging_rate_limit (void)
static unsigned long count, last_time;

if (count > 5 && jiffies - last_time > 5*HZ)
count = 0;
if (++count < 5) {
last_time = jiffies;
return 1;
return 0;


If this fundction returns 0, error messages have been rate limited. This
code is not MP-safe. So, if you need your code to be MP-safe, you may
need to rewrite it somewhat.


Khalid Aziz Linux Development Laboratory
(970)898-9214 Hewlett-Packard Fort Collins, CO
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:18    [W:0.038 / U:1.784 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site