mm-hugetlb_cma-support-percentage-based-hugetlb_cma-reservation.patch removed from -mm tree

The quilt patch titled
Subject: mm/hugetlb_cma: support percentage-based hugetlb_cma reservation
has been removed from the -mm tree. Its filename was
mm-hugetlb_cma-support-percentage-based-hugetlb_cma-reservation.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: Sourav Panda <[email protected]>
Subject: mm/hugetlb_cma: support percentage-based hugetlb_cma reservation
Date: Fri, 7 Aug 2026 04:00:03 +0000

Currently, hugetlb_cma reservation only supports absolute sizes (e.g., hugetlb_cma=2G or hugetlb_cma=0:1G,1:1G). This can be restrictive in heterogeneous environments or when deploying common kernel command lines across machines with different memory capacities.

Add support for percentage-based hugetlb_cma reservation (e.g., hugetlb_cma=20% or hugetlb_cma=0:20%,1:10%).

The percentage is calculated against the total memory (for global settings) or against the node-specific memory (for node-specific settings) using memblock APIs during early boot.

---

 Documentation/admin-guide/kernel-parameters.txt |   10 
 mm/hugetlb_cma.c                                |  142 +++++++++++++-
 2 files changed, 142 insertions(+), 10 deletions(-)

@@ -2064,8 +2064,14 @@ Kernel parameters
 	hugetlb_cma=	[HW,CMA,EARLY] The size of a CMA area used for allocation
 			of gigantic hugepages. Or using node format, the size
 			of a CMA area per node can be specified.
-			Format: nn[KMGTPE] or (node format)
-				<node>:nn[KMGTPE][,<node>:nn[KMGTPE]]
+			The size can be an absolute value (e.g., 2G) or a
+			percentage of the total memory or node memory (e.g., 20%).
+			Percentage-derived sizes are rounded down to a multiple of
+			the architecture's gigantic hugepage size and may become
+			zero.
+			Format: nn[KMGTPE] or nn% or (node format)
+				<node>:nn[KMGTPE][,<node>:nn[KMGTPE]] or
+				<node>:nn%[,<node>:nn%]
 
 			The size must be a multiple of the gigantic page size.
 			When using node format, this applies to each per-node size.

_

Patches currently in -mm which might be from [email protected] are

mm-hugetlb_cma-fix-null-nodemask-dereference-in-hugetlb_cma_alloc_frozen_folio.patch