在 2024/8/28 8:59, Andrew Morton 写道:
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?
No, this is all. Just want to avoid account twice.(add then sub)
Thanks.
