On Tue, Jan 27, 2015 at 11:40:28AM +0000, Thomas Graf wrote:

This is unrelated to resize run control though, the reason is that
I'm converting tcp_hashinfo et al and they require a hybrid approach.
The tables may be too big to construct a parallel data structure, we
don't want to hold off inserts or deletes while the expensive dump
is underway. Even though we can't build a shadow structure while
locking everybody else out, we still want to provide a way to somehow
achieve consistent information. I think that NLM_F_INTR with fallback
to restarting the dump is a good option and very easy to implement. In
that case, we want to lock out resize from dumping iterations but
still allow parallel insert/delete.

Well I guess Dave needs to make the call.  Do we want to allow
lockless walks over the hash table or not?

Personally I don't think a linked list is that big a deal.  But then
you guys were agonsing over a single pointer so who knows.

Cheers,
-- 
Email: Herbert Xu [off-list ref]
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