On 8/7/23 10:39, Hyeonggon Yoo wrote: > On Thu, Aug 3, 2023 at 11:54 PM Vlastimil Babka <vbabka@xxxxxxx> wrote: >> > > Thank you for looking at it! > > Yeah, it was a PoC for what I thought "oh, it might be useful" > and definitely I will try to measure it. > >> We could also postpone this until we have tried the percpu arrays >> improvements discussed at LSF/MM. > > Possibly, but can you please share your plans/opinions on it? Here's the very first attempt :) https://lore.kernel.org/linux-mm/20230808095342.12637-7-vbabka@xxxxxxx/ > I think one possible way is simply to allow the cpu freelist to be > mixed by objects from different slabs I didn't try that way, might be much trickier than it looks. > if we want to minimize changes, Or introduce a per cpu array similar > to what SLAB does now. Yes. > And one thing I'm having difficulty understanding is - what is the > mind behind/or impact of managing objects > on a slab basis, other than avoiding array queues in 2007? "The mind" is Christoph's so I'll leave that question to him :)
