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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2013-09-12 15:14:05 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-12 15:38:03 -0700 |
| commit | c02925540ca7019465a43c00f8a3c0186ddace2b (patch) | |
| tree | 3097ece86eedd0a01cf5dbc0a8f6c28fcbd1f4f7 /mm/memory.c | |
| parent | 128ec037bafe5905b2e6f2796f426a1d247d0066 (diff) | |
| download | lwn-c02925540ca7019465a43c00f8a3c0186ddace2b.tar.gz lwn-c02925540ca7019465a43c00f8a3c0186ddace2b.zip | |
thp: consolidate code between handle_mm_fault() and do_huge_pmd_anonymous_page()
do_huge_pmd_anonymous_page() has copy-pasted piece of handle_mm_fault()
to handle fallback path.
Let's consolidate code back by introducing VM_FAULT_FALLBACK return
code.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Hillf Danton <dhillf@gmail.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Hugh Dickins <hughd@google.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Matthew Wilcox <willy@linux.intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/mm/memory.c b/mm/memory.c index 5ec6f199e685..ca0003947115 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -3695,7 +3695,7 @@ static int do_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, * but allow concurrent faults), and pte mapped but not yet locked. * We return with mmap_sem still held, but pte unmapped and unlocked. */ -int handle_pte_fault(struct mm_struct *mm, +static int handle_pte_fault(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long address, pte_t *pte, pmd_t *pmd, unsigned int flags) { @@ -3774,9 +3774,12 @@ retry: if (!pmd) return VM_FAULT_OOM; if (pmd_none(*pmd) && transparent_hugepage_enabled(vma)) { + int ret = VM_FAULT_FALLBACK; if (!vma->vm_ops) - return do_huge_pmd_anonymous_page(mm, vma, address, - pmd, flags); + ret = do_huge_pmd_anonymous_page(mm, vma, address, + pmd, flags); + if (!(ret & VM_FAULT_FALLBACK)) + return ret; } else { pmd_t orig_pmd = *pmd; int ret; |