3 files changed, 14 insertions, 0 deletions

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 3a19b032c0eb..ea0f50bfbe03 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -33,6 +33,7 @@ void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed);
 
 extern unsigned long max_huge_pages;
 extern unsigned long hugepages_treat_as_movable;
+extern int hugetlb_dynamic_pool;
 extern const unsigned long hugetlb_zero, hugetlb_infinity;
 extern int sysctl_hugetlb_shm_group;
 
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index ec14aa8ac51f..96efbb859997 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -880,6 +880,14 @@ static ctl_table vm_table[] = {
                 .mode           = 0644,
                 .proc_handler   = &hugetlb_treat_movable_handler,
         },
+        {
+                .ctl_name       = CTL_UNNUMBERED,
+                .procname       = "hugetlb_dynamic_pool",
+                .data           = &hugetlb_dynamic_pool,
+                .maxlen         = sizeof(hugetlb_dynamic_pool),
+                .mode           = 0644,
+                .proc_handler   = &proc_dointvec,
+        },
 #endif
         {
                 .ctl_name       = VM_LOWMEM_RESERVE_RATIO,
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 31bbca6b2c90..efd78527ad1e 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -31,6 +31,7 @@ static unsigned int free_huge_pages_node[MAX_NUMNODES];
 static unsigned int surplus_huge_pages_node[MAX_NUMNODES];
 static gfp_t htlb_alloc_mask = GFP_HIGHUSER;
 unsigned long hugepages_treat_as_movable;
+int hugetlb_dynamic_pool;
 
 /*
  * Protects updates to hugepage_freelists, nr_huge_pages, and free_huge_pages
@@ -201,6 +202,10 @@ static struct page *alloc_buddy_huge_page(struct vm_area_struct *vma,
 {
         struct page *page;
 
+        /* Check if the dynamic pool is enabled */
+        if (!hugetlb_dynamic_pool)
+                return NULL;
+
         page = alloc_pages(htlb_alloc_mask|__GFP_COMP|__GFP_NOWARN,
                                         HUGETLB_PAGE_ORDER);
         if (page) {