linux-kernel - [RFC PATCH 4/5] EXPERIMENTAL: x86: use __GFP_UNMAPPED for modele

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Date:   Wed,  8 Mar 2023 11:41:05 +0200
From:   Mike Rapoport <rppt@...nel.org>
To:     linux-mm@...ck.org
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Mike Rapoport <rppt@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Rick Edgecombe <rick.p.edgecombe@...el.com>,
        Song Liu <song@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vlastimil Babka <vbabka@...e.cz>, linux-kernel@...r.kernel.org,
        x86@...nel.org
Subject: [RFC PATCH 4/5] EXPERIMENTAL: x86: use __GFP_UNMAPPED for modele_alloc()

From: "Mike Rapoport (IBM)" <rppt@...nel.org>

Signed-off-by: Mike Rapoport (IBM) <rppt@...nel.org>
---
 arch/x86/kernel/module.c | 2 +-
 mm/vmalloc.c             | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/module.c b/arch/x86/kernel/module.c
index 84ad0e61ba6e..845ed70ba5ab 100644
--- a/arch/x86/kernel/module.c
+++ b/arch/x86/kernel/module.c
@@ -67,7 +67,7 @@ static unsigned long int get_module_load_offset(void)
 
 void *module_alloc(unsigned long size)
 {
-	gfp_t gfp_mask = GFP_KERNEL;
+	gfp_t gfp_mask = GFP_KERNEL | __GFP_UNMAPPED;
 	void *p;
 
 	if (PAGE_ALIGN(size) > MODULES_LEN)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index ef910bf349e1..84220ec45ec2 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2892,7 +2892,7 @@ vm_area_alloc_pages(gfp_t gfp, int nid,
 	 * to fails, fallback to a single page allocator that is
 	 * more permissive.
 	 */
-	if (!order) {
+	if (!order && !(gfp & __GFP_UNMAPPED)) {
 		gfp_t bulk_gfp = gfp & ~__GFP_NOFAIL;
 
 		while (nr_allocated < nr_pages) {
-- 
2.35.1