The patch titled
Subject: mm: add a pmd_fault handler
has been removed from the -mm tree. Its filename was
mm-add-a-pmd_fault-handler.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>
Subject: mm: add a pmd_fault handler
Allow non-anonymous VMAs to provide huge pages in response to a page fault.
Signed-off-by: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>
Cc: Hillf Danton <dhillf@xxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Theodore Ts'o <tytso@xxxxxxx>
Cc: Jan Kara <jack@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mm.h | 2 ++
mm/memory.c | 30 ++++++++++++++++++++++++------
2 files changed, 26 insertions(+), 6 deletions(-)
diff -puN include/linux/mm.h~mm-add-a-pmd_fault-handler include/linux/mm.h
--- a/include/linux/mm.h~mm-add-a-pmd_fault-handler
+++ a/include/linux/mm.h
@@ -249,6 +249,8 @@ struct vm_operations_struct {
void (*close)(struct vm_area_struct * area);
int (*mremap)(struct vm_area_struct * area);
int (*fault)(struct vm_area_struct *vma, struct vm_fault *vmf);
+ int (*pmd_fault)(struct vm_area_struct *, unsigned long address,
+ pmd_t *, unsigned int flags);
void (*map_pages)(struct vm_area_struct *vma, struct vm_fault *vmf);
/* notification that a previously read-only page is about to become
diff -puN mm/memory.c~mm-add-a-pmd_fault-handler mm/memory.c
--- a/mm/memory.c~mm-add-a-pmd_fault-handler
+++ a/mm/memory.c
@@ -3232,6 +3232,27 @@ out:
return 0;
}
+static int create_huge_pmd(struct mm_struct *mm, struct vm_area_struct *vma,
+ unsigned long address, pmd_t *pmd, unsigned int flags)
+{
+ if (!vma->vm_ops)
+ return do_huge_pmd_anonymous_page(mm, vma, address, pmd, flags);
+ if (vma->vm_ops->pmd_fault)
+ return vma->vm_ops->pmd_fault(vma, address, pmd, flags);
+ return VM_FAULT_FALLBACK;
+}
+
+static int wp_huge_pmd(struct mm_struct *mm, struct vm_area_struct *vma,
+ unsigned long address, pmd_t *pmd, pmd_t orig_pmd,
+ unsigned int flags)
+{
+ if (!vma->vm_ops)
+ return do_huge_pmd_wp_page(mm, vma, address, pmd, orig_pmd);
+ if (vma->vm_ops->pmd_fault)
+ return vma->vm_ops->pmd_fault(vma, address, pmd, flags);
+ return VM_FAULT_FALLBACK;
+}
+
/*
* These routines also need to handle stuff like marking pages dirty
* and/or accessed for architectures that don't do it in hardware (most
@@ -3334,10 +3355,7 @@ static int __handle_mm_fault(struct mm_s
if (!pmd)
return VM_FAULT_OOM;
if (pmd_none(*pmd) && transparent_hugepage_enabled(vma)) {
- int ret = VM_FAULT_FALLBACK;
- if (!vma->vm_ops)
- ret = do_huge_pmd_anonymous_page(mm, vma, address,
- pmd, flags);
+ int ret = create_huge_pmd(mm, vma, address, pmd, flags);
if (!(ret & VM_FAULT_FALLBACK))
return ret;
} else {
@@ -3361,8 +3379,8 @@ static int __handle_mm_fault(struct mm_s
orig_pmd, pmd);
if (dirty && !pmd_write(orig_pmd)) {
- ret = do_huge_pmd_wp_page(mm, vma, address, pmd,
- orig_pmd);
+ ret = wp_huge_pmd(mm, vma, address, pmd,
+ orig_pmd, flags);
if (!(ret & VM_FAULT_FALLBACK))
return ret;
} else {
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxxxx are
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
