+ mm-vmalloc-add-a-helper-to-optimize-vmalloc-allocation-gfps.patch added to mm-unstable branch

+ mm-vmalloc-add-a-helper-to-optimize-vmalloc-allocation-gfps.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/vmalloc: add a helper to optimize vmalloc allocation gfps
has been added to the -mm mm-unstable branch.  Its filename is
     mm-vmalloc-add-a-helper-to-optimize-vmalloc-allocation-gfps.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-vmalloc-add-a-helper-to-optimize-vmalloc-allocation-gfps.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: "Vishal Moola (Oracle)" <vishal.moola@gmail.com>
Subject: mm/vmalloc: add a helper to optimize vmalloc allocation gfps
Date: Fri, 21 Nov 2025 01:44:03 -0800

vm_area_alloc_pages() attempts to use different gfp flags as a way to
optimize allocations.  This has been done inline which makes things harder
to read.

Add a helper function to make the code more readable.

Link: https://lkml.kernel.org/r/20251121094405.40628-3-vishal.moola@gmail.com
Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Reviewed-by: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
Acked-by: SeongJae Park <sj@kernel.org>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/vmalloc.c |   17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

--- a/mm/vmalloc.c~mm-vmalloc-add-a-helper-to-optimize-vmalloc-allocation-gfps
+++ a/mm/vmalloc.c
@@ -3614,6 +3614,17 @@ void *vmap_pfn(unsigned long *pfns, unsi
 EXPORT_SYMBOL_GPL(vmap_pfn);
 #endif /* CONFIG_VMAP_PFN */
 
+/*
+ * Helper for vmalloc to adjust the gfp flags for certain allocations.
+ */
+static inline gfp_t vmalloc_gfp_adjust(gfp_t flags, const bool large)
+{
+	flags |= __GFP_NOWARN;
+	if (large)
+		flags &= ~__GFP_NOFAIL;
+	return flags;
+}
+
 static inline unsigned int
 vm_area_alloc_pages(gfp_t gfp, int nid,
 		unsigned int order, unsigned int nr_pages, struct page **pages)
@@ -3852,9 +3863,9 @@ static void *__vmalloc_area_node(struct
 	 * Please note, the __vmalloc_node_range_noprof() falls-back
 	 * to order-0 pages if high-order attempt is unsuccessful.
 	 */
-	area->nr_pages = vm_area_alloc_pages((page_order ?
-		gfp_mask & ~__GFP_NOFAIL : gfp_mask) | __GFP_NOWARN,
-		node, page_order, nr_small_pages, area->pages);
+	area->nr_pages = vm_area_alloc_pages(
+			vmalloc_gfp_adjust(gfp_mask, page_order), node,
+			page_order, nr_small_pages, area->pages);
 
 	atomic_long_add(area->nr_pages, &nr_vmalloc_pages);
 	/* All pages of vm should be charged to same memcg, so use first one. */
_

Patches currently in -mm which might be from vishal.moola@gmail.com are

mm-vmalloc-warn-on-invalid-vmalloc-gfp-flags.patch
mm-vmalloc-add-a-helper-to-optimize-vmalloc-allocation-gfps.patch
mm-vmalloc-cleanup-large_gfp-in-vm_area_alloc_pages.patch
mm-vmalloc-cleanup-gfp-flag-use-in-new_vmap_block.patch

+ mm-vmalloc-add-a-helper-to-optimize-vmalloc-allocation-gfps.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/vmalloc: add a helper to optimize vmalloc allocation gfps
has been added to the -mm mm-unstable branch.  Its filename is
     mm-vmalloc-add-a-helper-to-optimize-vmalloc-allocation-gfps.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-vmalloc-add-a-helper-to-optimize-vmalloc-allocation-gfps.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: "Vishal Moola (Oracle)" <vishal.moola@gmail.com>
Subject: mm/vmalloc: add a helper to optimize vmalloc allocation gfps
Date: Mon, 17 Nov 2025 09:35:28 -0800

vm_area_alloc_pages() attempts to use different gfp flags as a way to
optimize allocations.  This has been done inline which makes things harder
to read.

Add a helper function to make the code more readable.

Link: https://lkml.kernel.org/r/20251117173530.43293-3-vishal.moola@gmail.com
Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/vmalloc.c |   17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

--- a/mm/vmalloc.c~mm-vmalloc-add-a-helper-to-optimize-vmalloc-allocation-gfps
+++ a/mm/vmalloc.c
@@ -3614,6 +3614,17 @@ void *vmap_pfn(unsigned long *pfns, unsi
 EXPORT_SYMBOL_GPL(vmap_pfn);
 #endif /* CONFIG_VMAP_PFN */
 
+/*
+ * Helper for vmalloc to adjust the gfp flags for certain allocations.
+ */
+static inline gfp_t vmalloc_gfp_adjust(gfp_t flags, const bool large)
+{
+	flags |= __GFP_NOWARN;
+	if (large)
+		flags &= ~__GFP_NOFAIL;
+	return flags;
+}
+
 static inline unsigned int
 vm_area_alloc_pages(gfp_t gfp, int nid,
 		unsigned int order, unsigned int nr_pages, struct page **pages)
@@ -3852,9 +3863,9 @@ static void *__vmalloc_area_node(struct
 	 * Please note, the __vmalloc_node_range_noprof() falls-back
 	 * to order-0 pages if high-order attempt is unsuccessful.
 	 */
-	area->nr_pages = vm_area_alloc_pages((page_order ?
-		gfp_mask & ~__GFP_NOFAIL : gfp_mask) | __GFP_NOWARN,
-		node, page_order, nr_small_pages, area->pages);
+	area->nr_pages = vm_area_alloc_pages(
+			vmalloc_gfp_adjust(gfp_mask, page_order), node,
+			page_order, nr_small_pages, area->pages);
 
 	atomic_long_add(area->nr_pages, &nr_vmalloc_pages);
 	/* All pages of vm should be charged to same memcg, so use first one. */
_

Patches currently in -mm which might be from vishal.moola@gmail.com are

mm-madvise-allow-guard-page-install-remove-under-vma-lock.patch
mm-vmalloc-warn-on-invalid-vmalloc-gfp-flags.patch
mm-vmalloc-add-a-helper-to-optimize-vmalloc-allocation-gfps.patch
mm-vmalloc-cleanup-large_gfp-in-vm_area_alloc_pages.patch
mm-vmalloc-cleanup-gfp-flag-use-in-new_vmap_block.patch