On Mon, Jan 25, 2021 at 10:21:14PM +0000, Song Bao Hua (Barry Song) wrote: > mlock, while certainly be able to prevent swapping out, it won't > be able to stop page moving due to: > * memory compaction in alloc_pages() > * making huge pages > * numa balance > * memory compaction in CMA Enabling those things is a major reason to have SVA device in the first place, providing a SW API to turn it all off seems like the wrong direction. If the device doesn't want to use SVA then don't use it, use normal DMA pinning like everything else. Jason
