[PATCH] NUMA spinlock [BZ #23962]

[Florian Weimer]

* H. J. Lu:

> Should glibc have scalable spinlock, in libc.so or a separate shared object?
> Or should we tell people that if they want scalable spinlock, they look
> elsewhere?

I think non-polymorphic, small lock types with scoped locking could make
sense for glibc.

A lock specific to a certain machine architecture seems strange.  We
currently lack any of the kernel NUMA interfaces in glibc, which makes
this stand out even more.

Thanks,
Florian