You're right, I misspoke. I wonder about ahl's point as well: is the Linux devs' position that they shouldn't create special hooks for code that is not GPL-compatible, and hence stands no chance of ever being integrated with the mainline kernel? Or is it only binary blobs they don't like? They really push hard the goal of getting everything promoted up to the mainline kernel.
Of course if it's the case that the in-kernel hooks can be made generic between SystemTap (et.al.) and DTrace, then it doesn't matter anyway.
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