[merged mm-stable] mmhugetlb-allocate-frozen-pages-in-alloc_buddy_hugetlb_folio.patch removed from -mm tree

[merged mm-stable] mmhugetlb-allocate-frozen-pages-in-alloc_buddy_hugetlb_folio.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm,hugetlb: allocate frozen pages in alloc_buddy_hugetlb_folio
has been removed from the -mm tree.  Its filename was
     mmhugetlb-allocate-frozen-pages-in-alloc_buddy_hugetlb_folio.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Oscar Salvador <osalvador@suse.de>
Subject: mm,hugetlb: allocate frozen pages in alloc_buddy_hugetlb_folio
Date: Fri, 11 Apr 2025 15:23:59 +0200

alloc_buddy_hugetlb_folio() allocates a rmappable folio, then strips the
rmappable part and freezes it.  We can simplify all that by allocating
frozen pages directly.

Link: https://lkml.kernel.org/r/20250411132359.312708-1-osalvador@suse.de
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Suggested-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Muchun Song <muchun.song@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/hugetlb.c |   17 +----------------
 1 file changed, 1 insertion(+), 16 deletions(-)

--- a/mm/hugetlb.c~mmhugetlb-allocate-frozen-pages-in-alloc_buddy_hugetlb_folio
+++ a/mm/hugetlb.c
@@ -1950,7 +1950,6 @@ static struct folio *alloc_buddy_hugetlb
 	int order = huge_page_order(h);
 	struct folio *folio;
 	bool alloc_try_hard = true;
-	bool retry = true;
 
 	/*
 	 * By default we always try hard to allocate the folio with
@@ -1965,22 +1964,8 @@ static struct folio *alloc_buddy_hugetlb
 		gfp_mask |= __GFP_RETRY_MAYFAIL;
 	if (nid == NUMA_NO_NODE)
 		nid = numa_mem_id();
-retry:
-	folio = __folio_alloc(gfp_mask, order, nid, nmask);
-	/* Ensure hugetlb folio won't have large_rmappable flag set. */
-	if (folio)
-		folio_clear_large_rmappable(folio);
 
-	if (folio && !folio_ref_freeze(folio, 1)) {
-		folio_put(folio);
-		if (retry) {	/* retry once */
-			retry = false;
-			goto retry;
-		}
-		/* WOW!  twice in a row. */
-		pr_warn("HugeTLB unexpected inflated folio ref count\n");
-		folio = NULL;
-	}
+	folio = (struct folio *)__alloc_frozen_pages(gfp_mask, order, nid, nmask);
 
 	/*
 	 * If we did not specify __GFP_RETRY_MAYFAIL, but still got a
_

Patches currently in -mm which might be from osalvador@suse.de are