On Fri, Jul 27, 2018 at 11:21:43AM -0500, Daniel Drake wrote: > Here I'm experimenting by adding another tag to the page cache radix tree, > tagging pages that were activated in the refault path. NAK. No more tags or you blow up the memory consumption of the radix tree by 15%. > And then in get_scan_count I'm checking how many active pages have that > tag, and also looking at the size of the active and inactive lists. You'd be better off using a bit in struct page somewhere ...
