On Tue, Mar 21, 2023 at 1:12 AM Coco Li <lixiaoyan@xxxxxxxxxx> wrote: > > From: Xiaoyan Li <lixiaoyan@xxxxxxxxxx> > > When compound pages are enabled, although the mm layer still > returns an array of page pointers, a subset (or all) of them > may have the same page head since a max 180kb skb can span 2 > hugepages if it is on the boundary, be a mix of pages and 1 hugepage, > or fit completely in a hugepage. Instead of referencing page head > on all page pointers, use page length arithmetic to only call page > head when referencing a known different page head to avoid touching > a cold cacheline. Reviewed-by: Eric Dumazet <edumazet@xxxxxxxxxx>
