[RFC PATCH 7/7] lazy tlb: shoot lazies, a non-refcounting lazy tlb option

[Peter Zijlstra]

On Tue, Jul 14, 2020 at 05:46:05AM -0700, Andy Lutomirski wrote:
> x86 has this exact problem. At least no more than 64*8 CPUs share the cache line :)

I've seen patches for a 'sparse' bitmap to solve related problems.

It's basically the same code, except it multiplies everything (size,
bit-nr) by a constant to reduce the number of active bits per line.

This sadly doesn't take topology into account, but reducing contention
is still good ofcourse.