Commit 630e7c5e authored by Kefeng Wang's avatar Kefeng Wang Committed by Andrew Morton
Browse files

mm: huge_memory: convert split_huge_pages_all() to use a folio 

Straightforwardly convert split_huge_pages_all() to use a folio.

Link: https://lkml.kernel.org/r/20221229122503.149083-1-wangkefeng.wang@huawei.com


Signed-off-by: default avatarKefeng Wang <wangkefeng.wang@huawei.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent c2ca7a59

mm/huge_memory.c

+17 −8
Original line number Diff line number Diff line
@@ -2935,6 +2935,7 @@ static void split_huge_pages_all(void) 
{

	struct zone *zone;

	struct page *page;

	struct folio *folio;

	unsigned long pfn, max_zone_pfn;

	unsigned long total = 0, split = 0;
@@ -2947,24 +2948,32 @@ static void split_huge_pages_all(void) 
			int nr_pages;



			page = pfn_to_online_page(pfn);

			if (!page || !get_page_unless_zero(page))

			if (!page || PageTail(page))

				continue;

			folio = page_folio(page);

			if (!folio_try_get(folio))

				continue;



			if (zone != page_zone(page))

			if (unlikely(page_folio(page) != folio))

				goto next;



			if (!PageHead(page) || PageHuge(page) || !PageLRU(page))

			if (zone != folio_zone(folio))

				goto next;



			if (!folio_test_large(folio)

				|| folio_test_hugetlb(folio)

				|| !folio_test_lru(folio))

				goto next;



			total++;

			lock_page(page);

			nr_pages = thp_nr_pages(page);

			if (!split_huge_page(page))

			folio_lock(folio);

			nr_pages = folio_nr_pages(folio);

			if (!split_folio(folio))

				split++;

			pfn += nr_pages - 1;

			unlock_page(page);

			folio_unlock(folio);

next:

			put_page(page);

			folio_put(folio);

			cond_resched();

		}

	}