+ arm64-vmalloc-allow-arch_vmap_pte_range_map_size-to-batch-multiple-cont_pte.patch added to mm-new branch

+ arm64-vmalloc-allow-arch_vmap_pte_range_map_size-to-batch-multiple-cont_pte.patch added to mm-new branch

[Andrew Morton]

The patch titled
     Subject: arm64/vmalloc: allow arch_vmap_pte_range_map_size to batch multiple CONT_PTE
has been added to the -mm mm-new branch.  Its filename is
     arm64-vmalloc-allow-arch_vmap_pte_range_map_size-to-batch-multiple-cont_pte.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/arm64-vmalloc-allow-arch_vmap_pte_range_map_size-to-batch-multiple-cont_pte.patch

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

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

The mm-new branch of mm.git is not included in linux-next

If a few days of testing in mm-new is successful, the patch will me moved
into mm.git's mm-unstable branch, which is included in linux-next

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 various
branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there most days

------------------------------------------------------
From: "Barry Song (Xiaomi)" <baohua@kernel.org>
Subject: arm64/vmalloc: allow arch_vmap_pte_range_map_size to batch multiple CONT_PTE
Date: Thu, 18 Jun 2026 16:47:22 +0800

Allow arch_vmap_pte_range_map_size to batch across multiple CONT_PTE
blocks, reducing both PTE setup and TLB flush iterations.

Link: https://lore.kernel.org/20260618084726.1070022-3-jiangwen6@xiaomi.com
Signed-off-by: Barry Song (Xiaomi) <baohua@kernel.org>
Signed-off-by: Wen Jiang <jiangwen6@xiaomi.com>
Tested-by: Xueyuan Chen <xueyuan.chen21@gmail.com>
Cc: Andrew Donnellan <ajd@linux.ibm.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Uladzislau Rezki <urezki@gmail.com>
Cc: Wen Jiang <jiangwenxiaomi@gmail.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/arm64/include/asm/vmalloc.h |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/arch/arm64/include/asm/vmalloc.h~arm64-vmalloc-allow-arch_vmap_pte_range_map_size-to-batch-multiple-cont_pte
+++ a/arch/arm64/include/asm/vmalloc.h
@@ -23,6 +23,8 @@ static inline unsigned long arch_vmap_pt
 						unsigned long end, u64 pfn,
 						unsigned int max_page_shift)
 {
+	unsigned long size;
+
 	/*
 	 * If the block is at least CONT_PTE_SIZE in size, and is naturally
 	 * aligned in both virtual and physical space, then we can pte-map the
@@ -40,7 +42,9 @@ static inline unsigned long arch_vmap_pt
 	if (!IS_ALIGNED(PFN_PHYS(pfn), CONT_PTE_SIZE))
 		return PAGE_SIZE;
 
-	return CONT_PTE_SIZE;
+	size = min3(end - addr, 1UL << max_page_shift, PMD_SIZE >> 1);
+	size = 1UL << __fls(size);
+	return size;
 }
 
 #define arch_vmap_pte_range_unmap_size arch_vmap_pte_range_unmap_size
_

Patches currently in -mm which might be from baohua@kernel.org are

arm64-hugetlb-extend-batching-of-multiple-cont_pte-in-a-single-pte-setup.patch
arm64-vmalloc-allow-arch_vmap_pte_range_map_size-to-batch-multiple-cont_pte.patch
mm-vmalloc-extend-page-table-walk-to-support-larger-page_shift-sizes-and-eliminate-page-table-rewalk.patch
mm-vmalloc-map-contiguous-pages-in-batches-for-vmap-if-possible.patch
mm-vmalloc-align-vm_area-so-vmap-can-batch-mappings.patch