Re: [x86] d55564cfc2: will-it-scale.per_thread_ops -5.8% regression

[Peter Zijlstra]

On Fri, Jan 08, 2021 at 09:37:45AM +0000, David Laight wrote:
> The lack of spinlocks in userspace really kills you.

Glibc has them, but please don't complain about lock holder preemption
issues if you do actually use them ;-)