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[Bug testsuite/10084] systemtap.examples/network/dropwatch fails on kernels without kfree_skb tracepoint
- From: "wenji dot huang at oracle dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 3 Jul 2009 07:54:12 -0000
- Subject: [Bug testsuite/10084] systemtap.examples/network/dropwatch fails on kernels without kfree_skb tracepoint
- References: <20090419124804.10084.mjw@redhat.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From wenji dot huang at oracle dot com 2009-07-03 07:54 -------
See the definition of trace point in kfree_skb(struct sk_buff *skb)
...
else if (likely(!atomic_dec_and_test(&skb->users)))
return;
trace_kfree_skb(skb, __builtin_return_address(0));
__kfree_skb(skb);
}
Maybe we can select __kfree_skb as the probe point. But Not easy to find the
replacement for the parameter __builtin_return_address(0).
--
http://sourceware.org/bugzilla/show_bug.cgi?id=10084
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