Re: [PATCH v8 4/5] locking/qspinlock: Introduce starvation avoidance into CNA

Peter Zijlstra
2020-01-25T11:20:09Z

On Fri, Jan 24, 2020 at 01:19:05PM -0500, Alex Kogan wrote:

> Is there a lightweight way to identify such a “prioritized” thread?

No; people might for instance care about tail latencies between their
identically spec'ed worker tasks.

In general it turns out that priority is a dynamic concept, not a static
one.