Hitachi djprobe mechanism

[Frank Ch. Eigler]

Mathieu Desnoyers <compudj@krystal.dyndns.org> writes:

> [...]  And as the jmp instruction is 5 bytes, there seems to be no
> hope to find an atomic operation that will write that.

There are other ways to skin the cat.  Remember, the speed of
inserting/removing these probes is not that important.  We may be
willing to pay extraordinary conservative synchronization costs like
IPI, cache flushing, and so on, as long as during *execution* time,
the probes are fast.

- FChE