But [LWN.net]

But

Posted Oct 8, 2011 19:30 UTC (Sat) by fuhchee (subscriber, #40059)
In reply to: But by rahulsundaram
Parent article: Oracle works on Dtrace for Linux (The H)

"till it requires no kernel patches"

I assume you're referring to utrace/uprobes. Yes, only probing general user-space requires these, and we can hardly wait until these are mainstream.

"and everything is in the mainline kernel"

If you're repeating the previous point, ok.
If you're suggesting that a tool must be distributed within the kernel tree in order to be useful, then considerable experience says otherwise.

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But

Posted Oct 8, 2011 19:59 UTC (Sat) by rahulsundaram (subscriber, #21946) [Link]

Yes. Utrace/uprobes need to be merged. It doesn't matter much where the user space tool lives.