Re: Notifier chains are unsafe

[Andreas Kleen]

Am Mi 26.10.2005 02:01 schrieb Chandra Seetharaman
<sekharan@xxxxxxxxxx>:

> > Better would be likely to use RCU.
>
> RCU will be a problem if the registered notifiers need to block.
Â
Actually blocking should be ok, as long as the blocking notifier doesn't
unregister
itself. The current next pointer will be always reloaded after the
blocking.
Â
Still on preemptive kernels there might be problems, but they could
be likely solved by a few strategic preempt_disables in
notifier_call_chain().
Â
Dipankar, what do you think?
Â
-Andi
Â

Â

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/