ixgbe/NFS m_defrag() instrumentation

[Garrett Wollman]

In article <E6B5E96C-A579-4187-B2FB-61B6B5E90D7F at yahoo.com>, Scott
Long writes:

>dtrace to the rescue?
>
>#!/usr/sbin/dtrace -s
>fbt::m_defrag:entry
>{
>	@ = count();
>}

I don't know where else m_defrag() might be called from, so I would be
more inclined to make that

	@[stack()] = count();

if I were going the dtrace route.

-GAWollman