Re: [PATCH v3 11/11] powerpc: rewrite local_t using soft_irq

On Tue, 2016-11-15 at 09:06 +0100, Gabriel Paubert wrote:

I'm really wondering whether this is the kind of thing that would
benefit from transactions. But transactional memory was only implemented
on Power7 and later IIRC, and we still need to support machines without
transactional memory. 

Power8 and later.

Also this is about *local* atomics not general atomics, so the overhead
of starting a transaction in that case is way way higher than the
proposed implementation.

Cheers,
Ben.