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SubjectRe: [RFC PATCH 03/15] Provide atomic_t functions implemented with ISO-C++11 atomics
On Wed, May 18, 2016 at 04:10:59PM +0100, David Howells wrote:
> (b) An ISYNC instruction is emitted as the Acquire barrier with
> __ATOMIC_SEQ_CST, but I'm not sure this is strong enough.
>
> (c) An LWSYNC instruction is emitted as the Release barrier with
> __ATOMIC_ACQ_REL or __ATOMIC_RELEASE. Is this strong enough that
> we could use these memorders instead?

Our atomic acquire/release operations are RCpc, so yes. Our locks would
like to be RCsc but currently powerpc is an RCpc holdout there as well.

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