On Sun, 17 Dec 2023 15:40:19 +0000 Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote: > On Sat, Dec 16, 2023 at 04:16:45PM -0800, Linus Torvalds wrote: > > On Fri, 15 Dec 2023 at 20:57, Yu Zhao <yuzhao@xxxxxxxxxx> wrote: > > > > > > There has been a short-term plan, i.e., moving some of folio->flags to > > > the lower bits of folio->lru so that we can drop the Kconfig > > > constraint. I have discussed this with Willy but never acted on it. My > > > priority has been to surface more of our ideas that can potentially > > > save users money on memory to the community. I'm CC'ing our team > > > leads. Please feel free to let us know your preference on the > > > priority. > > > > This is definitely a "eventually" thing on my wishlist, so I was more > > just wanting to hear that there is a plan, and somebody working on > > it.. > > "eventually" we should get rid of LRUs altogether. They're no good for > a modern CPU. > > https://lore.kernel.org/linux-mm/ZTc7SHQ4RbPkD3eZ@xxxxxxxxxxxxxxxxxxxx/ > OK, but... What of the cost of physical I/O? If a computationally more expensive scan results in less I/O (hopefully) then the balance is altered?
