On Fri, Apr 05, 2019 at 05:09:45PM -0700, Alexander Duyck wrote: > In addition we will need some way to identify which pages have been > hinted on and which have not. The way I believe easiest to do this > would be to overload the PageType value so that we could essentially > have two values for "Buddy" pages. We would have our standard "Buddy" > pages, and "Buddy" pages that also have the "Offline" value set in the > PageType field. Tracking the Online vs Offline pages this way would > actually allow us to do this with almost no overhead as the mapcount > value is already being reset to clear the "Buddy" flag so adding a > "Offline" flag to this clearing should come at no additional cost.
It bothers me a bit that this doesn't scale to multiple hint types if we ever need them. Would it be better to have two free lists: hinted and non-hinted one? -- MST
