[TAPSETS] Linux Kernel Event Trace Tool

[Frank Ch. Eigler]

Hi -

On Sun, Dec 18, 2005 at 12:34:34PM -0500, Mathieu Desnoyers wrote:

> [...]  If preemption is not disabled or interrupts disabled, you
> will have issues with _stp_printf.  [...]

Looking in stp_printf for reentrancy prevention is a mistake.  The
reentrancy treatment is supposed to be provided by the probe point
providers: kprobes or the other entry interfacing functions.  (Not all
of them do the right thing yet.)  The runtime functions callable from
probes should assume atomic calls: no reentrancy, no interrupts, and
so on.

- FChE