[PATCH mm-unstable v5 08/10] mm/hugetlb: convert free_gigantic_page() to folios

Sidhartha Kumar
2022-11-29T22:51:58Z

Convert callers of free_gigantic_page() to use folios, function is then
renamed to free_gigantic_folio().

Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
---
mm/hugetlb.c | 29 +++++++++++++++++------------
1 file changed, 17 insertions(+), 12 deletions(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index c889593d5053..5e580ab834c3 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1361,18 +1361,20 @@ static void destroy_compound_gigantic_folio(struct folio *folio,
__destroy_compound_gigantic_folio(folio, order, false);
}

-static void free_gigantic_page(struct page *page, unsigned int order)
+static void free_gigantic_folio(struct folio *folio, unsigned int order)
{
/*
* If the page isn't allocated using the cma allocator,
* cma_release() returns false.
*/
#ifdef CONFIG_CMA
- if (cma_release(hugetlb_cma[page_to_nid(page)], page, 1 << order))
+ int nid = folio_nid(folio);
+
+ if (cma_release(hugetlb_cma[nid], &folio->page, 1 << order))
return;
#endif

- free_contig_range(page_to_pfn(page), 1 << order);
+ free_contig_range(folio_pfn(folio), 1 << order);
}

#ifdef CONFIG_CONTIG_ALLOC
@@ -1426,7 +1428,8 @@ static struct page *alloc_gigantic_page(struct hstate *h, gfp_t gfp_mask,
{
return NULL;
}
-static inline void free_gigantic_page(struct page *page, unsigned int order) { }
+static inline void free_gigantic_folio(struct folio *folio,
+ unsigned int order) { }
static inline void destroy_compound_gigantic_folio(struct folio *folio,
unsigned int order) { }
#endif
@@ -1565,7 +1568,7 @@ static void __update_and_free_page(struct hstate *h, struct page *page)
* If we don't know which subpages are hwpoisoned, we can't free
* the hugepage, so it's leaked intentionally.
*/
- if (HPageRawHwpUnreliable(page))
+ if (folio_test_hugetlb_raw_hwp_unreliable(folio))
return;

if (hugetlb_vmemmap_restore(h, page)) {
@@ -1575,7 +1578,7 @@ static void __update_and_free_page(struct hstate *h, struct page *page)
* page and put the page back on the hugetlb free list and treat
* as a surplus page.
*/
- add_hugetlb_folio(h, page_folio(page), true);
+ add_hugetlb_folio(h, folio, true);
spin_unlock_irq(&hugetlb_lock);
return;
}
@@ -1588,7 +1591,7 @@ static void __update_and_free_page(struct hstate *h, struct page *page)
hugetlb_clear_page_hwpoison(&folio->page);

for (i = 0; i < pages_per_huge_page(h); i++) {
- subpage = nth_page(page, i);
+ subpage = folio_page(folio, i);
subpage->flags &= ~(1 << PG_locked | 1 << PG_error |
1 << PG_referenced | 1 << PG_dirty |
1 << PG_active | 1 << PG_private |
@@ -1597,12 +1600,12 @@ static void __update_and_free_page(struct hstate *h, struct page *page)

/*
* Non-gigantic pages demoted from CMA allocated gigantic pages
- * need to be given back to CMA in free_gigantic_page.
+ * need to be given back to CMA in free_gigantic_folio.
*/
if (hstate_is_gigantic(h) ||
hugetlb_cma_folio(folio, huge_page_order(h))) {
destroy_compound_gigantic_folio(folio, huge_page_order(h));
- free_gigantic_page(page, huge_page_order(h));
+ free_gigantic_folio(folio, huge_page_order(h));
} else {
__free_pages(page, huge_page_order(h));
}
@@ -2025,6 +2028,7 @@ static struct page *alloc_fresh_huge_page(struct hstate *h,
nodemask_t *node_alloc_noretry)
{
struct page *page;
+ struct folio *folio;
bool retry = false;

retry:
@@ -2035,14 +2039,14 @@ static struct page *alloc_fresh_huge_page(struct hstate *h,
nid, nmask, node_alloc_noretry);
if (!page)
return NULL;
-
+ folio = page_folio(page);
if (hstate_is_gigantic(h)) {
if (!prep_compound_gigantic_page(page, huge_page_order(h))) {
/*
* Rare failure to convert pages to compound page.
* Free pages and try again - ONCE!
*/
- free_gigantic_page(page, huge_page_order(h));
+ free_gigantic_folio(folio, huge_page_order(h));
if (!retry) {
retry = true;
goto retry;
@@ -3050,6 +3054,7 @@ static void __init gather_bootmem_prealloc(void)

list_for_each_entry(m, &huge_boot_pages, list) {
struct page *page = virt_to_page(m);
+ struct folio *folio = page_folio(page);
struct hstate *h = m->hstate;

VM_BUG_ON(!hstate_is_gigantic(h));
@@ -3060,7 +3065,7 @@ static void __init gather_bootmem_prealloc(void)
free_huge_page(page); /* add to the hugepage allocator */
} else {
/* VERY unlikely inflated ref count on a tail page */
- free_gigantic_page(page, huge_page_order(h));
+ free_gigantic_folio(folio, huge_page_order(h));
}

/*
--
2.38.1