From 00e8a671658b570d4db52e1cfa5c2e4b82c7a911 Mon Sep 17 00:00:00 2001
From: David Yat Sin <77975354+dayatsin-amd@users.noreply.github.com>
Date: Fri, 30 Jan 2026 11:36:05 -0500
Subject: [PATCH] rocr: Restore mmap flags back to MAP_PRIVATE (#2886)

Change mmap flags back to MAP_PRIVATE as MAP_SHARED increases allocation
time. Transparent huge pages are disabled for MAP_SHARED by default.
---
 projects/rocr-runtime/libhsakmt/src/fmm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/projects/rocr-runtime/libhsakmt/src/fmm.c b/projects/rocr-runtime/libhsakmt/src/fmm.c
index 57344aafa3..c0ccd9012b 100644
--- a/projects/rocr-runtime/libhsakmt/src/fmm.c
+++ b/projects/rocr-runtime/libhsakmt/src/fmm.c
@@ -2125,7 +2125,7 @@ static void *fmm_allocate_host_gpu(HsaKFDContext *ctx,
 
 		/* Map anonymous pages */
 		if (mmap(mem, MemorySizeInBytes, PROT_READ | PROT_WRITE,
-			 MAP_ANONYMOUS | MAP_SHARED | MAP_FIXED, -1, 0)
+			 MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0)
 		    == MAP_FAILED)
 			goto out_release_area;