On Mon, Jan 09, 2006 at 05:51:08PM +0300, Oleg Nesterov wrote:
> Srivatsa Vaddagiri wrote:
> > If we have to do a rcu_move_batch of ->donelist also,
> > then perhaps the ->donelist != NULL check is required in
> > rcu_pending?
>
> rcu_move_batch() always adds entries to the ->nxttail, so I think
> this patch is correct.
Hmm ..adding entries on dead cpu's ->donelist to ->nxtlist of some other CPU
doesnt make sense (it re-triggers graceperiods for all those callbacks which is
not needed). Maybe rcu_move_batch should take that into account and instead add
to ->donelist of current CPU which is processing the CPU_DEAD callback.
In which case, ->donelist != NULL check is still reqd in rcu_pending ?
--
Thanks and Regards,
Srivatsa Vaddagiri,
Linux Technology Center,
IBM Software Labs,
Bangalore, INDIA - 560017
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