From: Ben Gras <ben@minix3.org>
Date: Mon, 22 Mar 2010 13:55:51 +0000 (+0000)
Subject: only print 1 every 1000 spurious interrupts (per interrupt).
X-Git-Tag: v3.1.7~216
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/doc/syslog.conf.5.html?a=commitdiff_plain;h=4b2310a7eeffe1e62c4249a805aa43156b3ee3ee;p=minix.git

only print 1 every 1000 spurious interrupts (per interrupt).
---

diff --git a/kernel/interrupt.c b/kernel/interrupt.c
index 328a404fb..123a06fe7 100644
--- a/kernel/interrupt.c
+++ b/kernel/interrupt.c
@@ -13,6 +13,8 @@
  *   disable_irq:     disable hook for IRQ.
  */
 
+#include <assert.h>
+
 #include "kernel.h"
 #include "proc.h"
 #include "archconst.h"
@@ -117,13 +119,18 @@ PUBLIC void irq_handle(int irq)
   irq_hook_t * hook;
 
   /* here we need not to get this IRQ until all the handlers had a say */
+  assert(irq >= 0 && irq < NR_IRQ_VECTORS);
   hw_intr_mask(irq);
   hook = irq_handlers[irq];
 
-  /* Sanity check. */
+  /* Check for spurious interrupts. */
   if(hook == NULL) {
-      printf("%s: irq_handle:no handler registered, masking the IRQ...\n",
-          __FILE__);
+      static int nspurious[NR_IRQ_VECTORS];
+      nspurious[irq]++;
+      if(nspurious[irq] == 1 || !(nspurious[irq] % 1000)) {
+      	printf("irq_handle: spurious irq %d (count: %d); keeping masked\n",
+		irq, nspurious[irq]);
+      }
       return;
   }