Re: [PATCH v2] mm: add access/dirty bit on numa page fault

[Matthew Wilcox]

On Fri, Mar 18, 2022 at 09:01:32AM +0800, maobibo wrote:
> > Is this a correctness problem, in which case this will need to be
> > backported, or is this a performance problem, in which case can you
> > share some numbers?
> It is only performance issue, and there is no obvious performance
> improvement for general workloads on my hand, but I do not test
> it on microbenchmark.

... if there's no performance improvement, why should we apply this
patch?  Confused.