RE: Control Dependencies vs C Compilers

David Laight
2020-10-06T15:07:48Z

> Please go read memory-barriers.txt for a bunch of other examples.

My brain hurts.
It's not as though I've not known about most of this since
the first SMP capable SPARC cpus that had a 'store buffer'.
(Probably 30 years ago.)

I sometimes wonder whether compiling things like the kernel
requires a compiler mode that defaults everything (except
function locals) to 'volatile'.
Although that still does fix control dependencies.

David

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