On Mon, May 20, 2019 at 12:52:47PM +0900, Minchan Kim wrote: > IMHO we should spell it out that this patchset complements MADV_WONTNEED > and MADV_FREE by adding non-destructive ways to gain some free memory > space. MADV_COLD is similar to MADV_WONTNEED in a way that it hints the > kernel that memory region is not currently needed and should be reclaimed > immediately; MADV_COOL is similar to MADV_FREE in a way that it hints the > kernel that memory region is not currently needed and should be reclaimed > when memory pressure rises.
Do we tear down page tables for these ranges? That seems like a good way of reclaiming potentially a substantial amount of memory.
