On 2021/8/31 21:38, Mel Gorman wrote: > On Mon, Aug 30, 2021 at 10:10:48PM +0800, Miaohe Lin wrote: >> It's also confusing now. Remove it. >> > > Why is the whole comment obsolete? > > The second two paragraphs about "all pages pinned" and pages_scanned is > obsolete and can go but the first paragraph is valid. > I think the first paragraph is invalid due to the below statement: "Assumes all pages on list are in same zone, and of same order." There are NR_PCP_LISTS lists and PAGE_ALLOC_COSTLY_ORDER + 1 + NR_PCP_THP orders in pcp. So I think it's obsolete. Should I delete this statement in the first paragraph only? Many Thanks.