From: David Hildenbrand <david@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org, xen-devel@lists.xenproject.org,
linux-fsdevel@vger.kernel.org, nvdimm@lists.linux.dev,
linuxppc-dev@lists.ozlabs.org,
David Hildenbrand <david@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Madhavan Srinivasan <maddy@linux.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Juergen Gross <jgross@suse.com>,
Stefano Stabellini <sstabellini@kernel.org>,
Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>,
Dan Williams <dan.j.williams@intel.com>,
Matthew Wilcox <willy@infradead.org>, Jan Kara <jack@suse.cz>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Christian Brauner <brauner@kernel.org>,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
Vlastimil Babka <vbabka@suse.cz>, Mike Rapoport <rppt@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Michal Hocko <mhocko@suse.com>, Zi Yan <ziy@nvidia.com>,
Baolin Wang <baolin.wang@linux.alibaba.com>,
Nico Pache <npache@redhat.com>,
Ryan Roberts <ryan.roberts@arm.com>, Dev Jain <dev.jain@arm.com>,
Barry Song <baohua@kernel.org>, Jann Horn <jannh@google.com>,
Pedro Falcato <pfalcato@suse.de>, Hugh Dickins <hughd@google.com>,
Oscar Salvador <osalvador@suse.de>,
Lance Yang <lance.yang@linux.dev>,
Alistair Popple <apopple@nvidia.com>,
Wei Yang <richard.weiyang@gmail.com>
Subject: [PATCH v3 02/11] mm/huge_memory: move more common code into insert_pud()
Date: Mon, 11 Aug 2025 13:26:22 +0200 [thread overview]
Message-ID: <20250811112631.759341-3-david@redhat.com> (raw)
In-Reply-To: <20250811112631.759341-1-david@redhat.com>
Let's clean it all further up.
No functional change intended.
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: Alistair Popple <apopple@nvidia.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reviewed-by: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
mm/huge_memory.c | 36 +++++++++++++-----------------------
1 file changed, 13 insertions(+), 23 deletions(-)
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 5314a89d676f1..7933791b75f4d 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1507,25 +1507,30 @@ static pud_t maybe_pud_mkwrite(pud_t pud, struct vm_area_struct *vma)
return pud;
}
-static void insert_pud(struct vm_area_struct *vma, unsigned long addr,
+static vm_fault_t insert_pud(struct vm_area_struct *vma, unsigned long addr,
pud_t *pud, struct folio_or_pfn fop, pgprot_t prot, bool write)
{
struct mm_struct *mm = vma->vm_mm;
+ spinlock_t *ptl;
pud_t entry;
+ if (addr < vma->vm_start || addr >= vma->vm_end)
+ return VM_FAULT_SIGBUS;
+
+ ptl = pud_lock(mm, pud);
if (!pud_none(*pud)) {
const unsigned long pfn = fop.is_folio ? folio_pfn(fop.folio) :
fop.pfn;
if (write) {
if (WARN_ON_ONCE(pud_pfn(*pud) != pfn))
- return;
+ goto out_unlock;
entry = pud_mkyoung(*pud);
entry = maybe_pud_mkwrite(pud_mkdirty(entry), vma);
if (pudp_set_access_flags(vma, addr, pud, entry, 1))
update_mmu_cache_pud(vma, addr, pud);
}
- return;
+ goto out_unlock;
}
if (fop.is_folio) {
@@ -1544,6 +1549,9 @@ static void insert_pud(struct vm_area_struct *vma, unsigned long addr,
}
set_pud_at(mm, addr, pud, entry);
update_mmu_cache_pud(vma, addr, pud);
+out_unlock:
+ spin_unlock(ptl);
+ return VM_FAULT_NOPAGE;
}
/**
@@ -1565,7 +1573,6 @@ vm_fault_t vmf_insert_pfn_pud(struct vm_fault *vmf, unsigned long pfn,
struct folio_or_pfn fop = {
.pfn = pfn,
};
- spinlock_t *ptl;
/*
* If we had pud_special, we could avoid all these restrictions,
@@ -1577,16 +1584,9 @@ vm_fault_t vmf_insert_pfn_pud(struct vm_fault *vmf, unsigned long pfn,
(VM_PFNMAP|VM_MIXEDMAP));
BUG_ON((vma->vm_flags & VM_PFNMAP) && is_cow_mapping(vma->vm_flags));
- if (addr < vma->vm_start || addr >= vma->vm_end)
- return VM_FAULT_SIGBUS;
-
pfnmap_setup_cachemode_pfn(pfn, &pgprot);
- ptl = pud_lock(vma->vm_mm, vmf->pud);
- insert_pud(vma, addr, vmf->pud, fop, pgprot, write);
- spin_unlock(ptl);
-
- return VM_FAULT_NOPAGE;
+ return insert_pud(vma, addr, vmf->pud, fop, pgprot, write);
}
EXPORT_SYMBOL_GPL(vmf_insert_pfn_pud);
@@ -1603,25 +1603,15 @@ vm_fault_t vmf_insert_folio_pud(struct vm_fault *vmf, struct folio *folio,
{
struct vm_area_struct *vma = vmf->vma;
unsigned long addr = vmf->address & PUD_MASK;
- pud_t *pud = vmf->pud;
- struct mm_struct *mm = vma->vm_mm;
struct folio_or_pfn fop = {
.folio = folio,
.is_folio = true,
};
- spinlock_t *ptl;
-
- if (addr < vma->vm_start || addr >= vma->vm_end)
- return VM_FAULT_SIGBUS;
if (WARN_ON_ONCE(folio_order(folio) != PUD_ORDER))
return VM_FAULT_SIGBUS;
- ptl = pud_lock(mm, pud);
- insert_pud(vma, addr, vmf->pud, fop, vma->vm_page_prot, write);
- spin_unlock(ptl);
-
- return VM_FAULT_NOPAGE;
+ return insert_pud(vma, addr, vmf->pud, fop, vma->vm_page_prot, write);
}
EXPORT_SYMBOL_GPL(vmf_insert_folio_pud);
#endif /* CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
--
2.50.1
next prev parent reply other threads:[~2025-08-11 11:26 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-11 11:26 [PATCH v3 00/11] mm: vm_normal_page*() improvements David Hildenbrand
2025-08-11 11:26 ` [PATCH v3 01/11] mm/huge_memory: move more common code into insert_pmd() David Hildenbrand
2025-08-12 4:52 ` Lance Yang
2025-08-11 11:26 ` David Hildenbrand [this message]
2025-08-11 11:26 ` [PATCH v3 03/11] mm/huge_memory: support huge zero folio in vmf_insert_folio_pmd() David Hildenbrand
2025-08-11 11:26 ` [PATCH v3 04/11] fs/dax: use vmf_insert_folio_pmd() to insert the huge zero folio David Hildenbrand
2025-08-11 11:26 ` [PATCH v3 05/11] mm/huge_memory: mark PMD mappings of the huge zero folio special David Hildenbrand
2025-08-12 18:14 ` Lorenzo Stoakes
2025-08-11 11:26 ` [PATCH v3 06/11] powerpc/ptdump: rename "struct pgtable_level" to "struct ptdump_pglevel" David Hildenbrand
2025-08-12 18:23 ` Lorenzo Stoakes
2025-08-12 18:39 ` Christophe Leroy
2025-08-12 18:54 ` Lorenzo Stoakes
2025-08-26 16:28 ` Ritesh Harjani
2025-08-27 13:57 ` David Hildenbrand
2025-08-11 11:26 ` [PATCH v3 07/11] mm/rmap: convert "enum rmap_level" to "enum pgtable_level" David Hildenbrand
2025-08-12 18:33 ` Lorenzo Stoakes
2025-08-11 11:26 ` [PATCH v3 08/11] mm/memory: convert print_bad_pte() to print_bad_page_map() David Hildenbrand
2025-08-12 18:48 ` Lorenzo Stoakes
2025-08-25 12:31 ` David Hildenbrand
2025-08-26 5:25 ` Lorenzo Stoakes
2025-08-26 6:17 ` David Hildenbrand
2025-08-11 11:26 ` [PATCH v3 09/11] mm/memory: factor out common code from vm_normal_page_*() David Hildenbrand
2025-08-12 19:06 ` Lorenzo Stoakes
2025-08-11 11:26 ` [PATCH v3 10/11] mm: introduce and use vm_normal_page_pud() David Hildenbrand
2025-08-12 19:38 ` Lorenzo Stoakes
2025-08-11 11:26 ` [PATCH v3 11/11] mm: rename vm_ops->find_special_page() to vm_ops->find_normal_page() David Hildenbrand
2025-08-12 19:43 ` Lorenzo Stoakes
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