On 09/05/2016 13:50, Alex Bennée wrote:
> > Which locks?  tb_lock during tb_find_fast?  The problem with that was
> > that it slowed down everything a lot, wasn't it?
> 
> Very much so, in the new tree (coming soon) with QHT I was able to
> remove the locks from the whole hot-path which means they where only
> needed for code generation.

Okay, I'm curious now. :)

> > To me, the RCU idea is not really about making tb_flush (the rare case)
> > faster; it was more about keeping the rest simple and fast.
> 
> I'm not sure it achieved that as there is added complexity from having
> the split buffer and then ensuring you don't double-flush.

Agreed.

Paolo

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