If I corrupt loopback so it fails to transmit a few packets, I can
emulate the same kind of TCP stalls that have frequented the kernel.
Corrupt patch....
--- /usr/src/linux/drivers/net/loopback.c.org Tue Sep 1 15:41:22 1998
+++ /usr/src/linux/drivers/net/loopback.c Tue Sep 1 15:40:49 1998
@@ -59,10 +59,15 @@
* called with bh's disabled).
*/
+static int foo=0;
+
static int loopback_xmit(struct sk_buff *skb, struct device *dev)
{
+
struct net_device_stats *stats = (struct net_device_stats *)dev->priv;
+ if(!foo++ & 0x3)
+ return 0;
/*
* Take this out if the debug says its ok
*/
It takes seconds to recover, sometimes many seconds. Throughput goes
way down. Test program upon request.
Cheers,
Dick Johnson
***** FILE SYSTEM WAS MODIFIED *****
Penguin : Linux version 2.1.118 on an i586 machine (66.15 BogoMips).
Warning : It's hard to remain at the trailing edge of technology.
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