On Mon, 26 Aug 2024 14:40:48 +0800 Huan Yang <link@xxxxxxxx> wrote: > When page del from buddy and need expand, it will account free_pages > in zone's migratetype. > > The current way is to subtract the page number of the current order > when deleting, and then add it back when expanding. > > This is unnecessary, as when migrating the same type, we can directly > record the difference between the high-order pages and the expand > added, and then subtract it directly. > > This patch merge that, only when del and expand done, then account > free_pages. It isn't obvious to me that this is a significant improvement. Am I missing something?
