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SubjectRe: Notifier chains are unsafe
Am Mi 26.10.2005 02:01 schrieb Chandra Seetharaman
<sekharan@us.ibm.com>:

> > Better would be likely to use RCU.
>
> RCU will be a problem if the registered notifiers need to block.
 
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.
 
Still on preemptive kernels there might be problems, but they could
be likely solved by a few strategic preempt_disables in
notifier_call_chain().
 
Dipankar, what do you think?
 
-Andi
 

 

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