[PATCH] quieten OOM killer noise

[Anton Blanchard <anton@samba.org>]

We now print statistics when invoking the OOM killer, however this
information is not rate limited and you can get into situations where
the console is continually spammed.

For example, when a task is exiting the OOM killer will simply return
(waiting for that task to exit and clear up memory). If the VM
continually calls back into the OOM killer we get thousands of copies of
show_mem() on the console.

Use printk_ratelimit() to quieten it.

Signed-off-by: Anton Blanchard <anton@samba.org>

Index: foobar2/mm/oom_kill.c
===================================================================
--- foobar2.orig/mm/oom_kill.c	2005-07-02 15:56:13.000000000 +1000
+++ foobar2/mm/oom_kill.c	2005-07-04 01:38:59.474324542 +1000
@@ -258,9 +258,11 @@
 	struct mm_struct *mm = NULL;
 	task_t * p;
 
-	printk("oom-killer: gfp_mask=0x%x\n", gfp_mask);
-	/* print memory stats */
-	show_mem();
+	if (printk_ratelimit()) {
+		printk("oom-killer: gfp_mask=0x%x\n", gfp_mask);
+		/* print memory stats */
+		show_mem();
+	}
 
 	read_lock(&tasklist_lock);
 retry: