[Bug testsuite/10084] systemtap.examples/network/dropwatch fails on kernels without kfree_skb tracepoint

[fche at redhat dot com]

------- Additional Comments From fche at redhat dot com  2009-04-19 16:14 -------
By studying the placement of the tracepoint, one can probably
identify a nearly-equivalent kprobe as a fallback, which could
be listed in the .stp file thusly:

  probe kernel.trace("kfree_skb")!, 
        kernel.function("dev_kfree_skb" /* ? */) { ... }

If parameters are needed, one'd have to split this up into
tapset/alias constructs, like this:

probe kfree_skb_1 = kernel.trace("kfree_skb") { it=$arg1 ... }
probe kfree_skb_2 = kernel.function("dev_kfree_skb") { it=$foo ... }
probe kfree_skb_1 ! , kfree_skb_2 { println (it) }


-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=10084

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