Patchwork [2/2] pktgen: nmi watchdog keep alive

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Submitter stephen hemminger
Date Sept. 20, 2009, 5:21 a.m.
Message ID <20090919222103.017b5d5f@nehalam>
Download mbox | patch
Permalink /patch/33956/
State Deferred
Delegated to: David Miller
Headers show

Comments

stephen hemminger - Sept. 20, 2009, 5:21 a.m.
If pktgen gets really busy it takes up all the CPU,
and can starve the NMI thread and cause system reset.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>

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Patch

--- a/net/core/pktgen.c	2009-09-19 11:28:53.762463050 -0700
+++ b/net/core/pktgen.c	2009-09-19 11:30:36.534459968 -0700
@@ -136,6 +136,7 @@ 
 #include <linux/delay.h>
 #include <linux/timer.h>
 #include <linux/list.h>
+#include <linux/nmi.h>
 #include <linux/init.h>
 #include <linux/skbuff.h>
 #include <linux/netdevice.h>
@@ -3369,6 +3370,7 @@  static void idle(struct pktgen_dev *pkt_
 {
 	ktime_t idle_start = ktime_now();
 
+	touch_nmi_watchdog();
 	if (need_resched())
 		schedule();
 	else