Hitachi djprobe mechanism

[Mathieu Desnoyers]

* Roland McGrath (roland@redhat.com) wrote:
> It's OK for probe insertion to be slow.  So why not use RCU to synchronize
> other processors?
> 

No,

The reason is we have no control on preemption disabling around the concerned
area.

It makes no sense to wait for a period of time that guarantee that all other
processors will have scheduled to something else when, in fact, it is possible
to schedule in and out from the critical section.


Mathieu


OpenPGP public key:              http://krystal.dyndns.org:8080/key/compudj.gpg
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