[Skiboot] [PATCH v2 4/9] powerpc/powernv: OPAL console standardise OPAL_BUSY loops

Benjamin Herrenschmidt benh at kernel.crashing.org
Mon Apr 9 18:22:36 AEST 2018

On Mon, 2018-04-09 at 16:13 +1000, Nicholas Piggin wrote:
> We can always make exceptions to the standard form, but in those
> cases I would like to document it in the OPAL API and comment for
> the Linux side.
> My thinking in this case is that it reduces time in firmware and
> in particular holding console locks. Is it likely / possible that
> we don't have enough buffering or some other issue makes it worth
> retrying so quickly?

Not sure to be honest, but yeah limiting the lock contention inside
OPAL is probably not a bad idea.


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