Re: [RT LATENCY] 249 microsecond latency caused by slub'sunfreeze_partials() code.

[Steven Rostedt]

On Wed, 2013-03-27 at 11:59 +0900, Joonsoo Kim wrote:

> How about using spin_try_lock() in unfreeze_partials() and
> using spin_lock_contented() in get_partial_node() to reduce latency?
> IMHO, this doesn't make code more deterministic, but can maintain
> a benefit of cpu partial page with tolerable latency.

And what do you do when you fail the try lock? Try again, or just break
out?

We can run benchmarks, but I don't like playing games in -rt. It either
is deterministic, or it isn't.

-- Steve


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