linux-kernel - [RFC V3 8/9] adjust NR_MAX_BATCHED

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Message-ID: <20250923174752.35701-9-shivankg@amd.com>
Date: Tue, 23 Sep 2025 17:47:43 +0000
From: Shivank Garg <shivankg@....com>
To: <akpm@...ux-foundation.org>, <david@...hat.com>
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Subject: [RFC V3 8/9] adjust NR_MAX_BATCHED_MIGRATION for testing

From: Zi Yan <ziy@...dia.com>

change NR_MAX_BATCHED_MIGRATION to HPAGE_PUD_NR to allow batching THP
copies.

These are for testing purpose only.

Signed-off-by: Zi Yan <ziy@...dia.com>
Signed-off-by: Shivank Garg <shivankg@....com>
---
 mm/migrate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index 41bea48d823c..7f50813d87e4 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1668,7 +1668,7 @@ static inline int try_split_folio(struct folio *folio, struct list_head *split_f
 }
 
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
-#define NR_MAX_BATCHED_MIGRATION	HPAGE_PMD_NR
+#define NR_MAX_BATCHED_MIGRATION	HPAGE_PUD_NR
 #else
 #define NR_MAX_BATCHED_MIGRATION	512
 #endif
-- 
2.43.0