Recent probing at the Linux Kernel Memory Model uncovered a
'surprise'. Strongly ordered architectures where the atomic RmW
primitive implies full memory ordering and
smp_mb__{before,after}_atomic() are a simple barrier() (such as x86)
fail for:
*x = 1;
atomic_inc(u);
smp_m
On Thu, Jun 13, 2019 at 03:43:21PM +0200, Peter Zijlstra wrote:
> Recent probing at the Linux Kernel Memory Model uncovered a
> 'surprise'. Strongly ordered architectures where the atomic RmW
> primitive implies full memory ordering and
> smp_mb__{before,after}_atomic() are a simple barrier() (such
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