diff options
| -rw-r--r-- | mm/page_alloc.c | 24 |
1 files changed, 0 insertions, 24 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 505d59f7d4fa..279852eae9db 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1429,15 +1429,6 @@ static bool bulkfree_pcp_prepare(struct page *page) } #endif /* CONFIG_DEBUG_VM */ -static inline void prefetch_buddy(struct page *page, unsigned int order) -{ - unsigned long pfn = page_to_pfn(page); - unsigned long buddy_pfn = __find_buddy_pfn(pfn, order); - struct page *buddy = page + (buddy_pfn - pfn); - - prefetch(buddy); -} - /* * Frees a number of pages from the PCP lists * Assumes all pages on list are in same zone. @@ -1450,7 +1441,6 @@ static void free_pcppages_bulk(struct zone *zone, int count, int min_pindex = 0; int max_pindex = NR_PCP_LISTS - 1; unsigned int order; - int prefetch_nr = READ_ONCE(pcp->batch); bool isolated_pageblocks; struct page *page; @@ -1505,20 +1495,6 @@ static void free_pcppages_bulk(struct zone *zone, int count, if (bulkfree_pcp_prepare(page)) continue; - /* - * We are going to put the page back to the global - * pool, prefetch its buddy to speed up later access - * under zone->lock. It is believed the overhead of - * an additional test and calculating buddy_pfn here - * can be offset by reduced memory latency later. To - * avoid excessive prefetching due to large count, only - * prefetch buddy for the first pcp->batch nr of pages. - */ - if (prefetch_nr) { - prefetch_buddy(page, order); - prefetch_nr--; - } - /* MIGRATE_ISOLATE page should not go to pcplists */ VM_BUG_ON_PAGE(is_migrate_isolate(mt), page); /* Pageblock could have been isolated meanwhile */ |