RE: [PATCH 3/4] mm/slub: simplify get_partial_node()

[Song, Xiongwei]

> 
> On 4/3/24 2:37 AM, Song, Xiongwei wrote:
> >>
> >>
> >> It could be tempting to use >= instead of > to achieve the same effect but
> >> that would have unintended performance effects that would best be evaluated
> >> separately.
> >
> > I can run a test to measure Amean changes. But in terms of x86 assembly, there
> > should not be extra  instructions with ">=".
> >
> > Did a simple test, for ">=" it uses "jle" instruction, while "jl" instruction is used for ">".
> > No more instructions involved. So there should not be performance effects on x86.
> 
> Right, I didn't mean the code of the test, but how the difference of the
> comparison affects how many cpu partial slabs would be put on the cpu
> partial list here.

Got it. Will do measurement for it.

Thanks,
Xiongwei