On Thu, Mar 07, 2019 at 02:35:53PM -0800, Alexander Duyck wrote: > The only other thing I still want to try and see if I can do is to add > a jiffies value to the page private data in the case of the buddy > pages. Actually there's one extra thing I think we should do, and that is make sure we do not leave less than X% off the free memory at a time. This way chances of triggering an OOM are lower. > With that we could track the age of the page so it becomes > easier to only target pages that are truly going cold rather than > trying to grab pages that were added to the freelist recently. I like that but I have a vague memory of discussing this with Rik van Riel and him saying it's actually better to take away recently used ones. Can't see why would that be but maybe I remember wrong. Rik - am I just confused? -- MST
