[SRU][N/O:linux-intel][PATCH 3/4] mm: accept to promo watermark

[Thibault Ferrante]

From: "Kirill A. Shutemov" <kirill.shutemov at linux.intel.com>

BugLink: https://bugs.launchpad.net/bugs/2103530

Commit c574bbe91703 ("NUMA balancing: optimize page placement for memory
tiering system") introduced a new watermark above "high" -- "promo".

Accept memory memory to the highest watermark which is WMARK_PROMO now.

Link: https://lkml.kernel.org/r/20240809114854.3745464-9-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov at linux.intel.com>
Cc: Borislav Petkov <bp at alien8.de>
Cc: David Hildenbrand <david at redhat.com>
Cc: Johannes Weiner <hannes at cmpxchg.org>
Cc: Matthew Wilcox <willy at infradead.org>
Cc: Mel Gorman <mgorman at suse.de>
Cc: Mike Rapoport (Microsoft) <rppt at kernel.org>
Cc: Tom Lendacky <thomas.lendacky at amd.com>
Cc: Vlastimil Babka <vbabka at suse.cz>
Signed-off-by: Andrew Morton <akpm at linux-foundation.org>
(cherry picked from commit aca5f2a1764c8ae8505a3770567b6cf19eb18991 https://github.com/intel/kernel-downstream)
Signed-off-by: Thibault Ferrante <thibault.ferrante at canonical.com>
---
 mm/page_alloc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 031b86f19de5b..024cb5b843c6e 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6998,8 +6998,8 @@ static bool cond_accept_memory(struct zone *zone, unsigned int order)
 	if (list_empty(&zone->unaccepted_pages))
 		return false;
 
-	/* How much to accept to get to high watermark? */
-	to_accept = high_wmark_pages(zone) -
+	/* How much to accept to get to promo watermark? */
+	to_accept = promo_wmark_pages(zone) -
 		    (zone_page_state(zone, NR_FREE_PAGES) -
 		    __zone_watermark_unusable_free(zone, order, 0) -
 		    zone_page_state(zone, NR_UNACCEPTED));
-- 
2.45.2