Re: [PATCH 1/2] tracing/function-return-tracer: Make the function return tracer lockless

[Andi Kleen]

> Now tell me again how local_* is more efficient than barrier?

Look at the generated assembler, not the source. The M386 check is two instructions
with the i386 stuff just moved away somewhere out of line that is
about never taken. The rest is short and straight forward in asm too.
And a lot of kernels are not compiled with 386 support anyways.

-Andi

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