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authorArjan van de Ven <arjan@linux.intel.com>2008-05-02 16:21:07 -0700
committerDavid S. Miller <davem@davemloft.net>2008-05-02 16:21:07 -0700
commitb4192bbd85d29eb3bec7f9297d6464250e6a7a90 (patch)
tree37d4e4ecea52e85e561d29faca0f5db5804348d3 /net/sched
parent50aab54f3056ba28afc681f71adee41c399dde1e (diff)
downloadlinux-b4192bbd85d29eb3bec7f9297d6464250e6a7a90.tar.bz2
net: Add a WARN_ON_ONCE() to the transmit timeout function
WARN_ON_ONCE() gives a stack trace including the full module list. Having this in the kernel dump for the timeout case in the generic netdev watchdog will help us see quicker which driver is involved. It also allows us to collect statistics and patterns in terms of which drivers have this event occuring. Suggested by Andrew Morton Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched')
-rw-r--r--net/sched/sch_generic.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index b741618e4d54..d355e5e47fe3 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -219,6 +219,7 @@ static void dev_watchdog(unsigned long arg)
printk(KERN_INFO "NETDEV WATCHDOG: %s: transmit timed out\n",
dev->name);
dev->tx_timeout(dev);
+ WARN_ON_ONCE(1);
}
if (!mod_timer(&dev->watchdog_timer, round_jiffies(jiffies + dev->watchdog_timeo)))
dev_hold(dev);