| From | "Kirill A. Shutemov" <> | Subject | [PATCH 22/23] thp, mm: split huge page on mmap file page | Date | Sun, 4 Aug 2013 05:17:24 +0300 |
| |
From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
We are not ready to mmap file-backed tranparent huge pages. Let's split them on fault attempt.
Later we'll implement mmap() properly and this code path be used for fallback cases.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> --- mm/filemap.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/mm/filemap.c b/mm/filemap.c index ed65af5..f7857ef 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1743,6 +1743,8 @@ retry_find: goto no_cached_page; } + if (PageTransCompound(page)) + split_huge_page(compound_trans_head(page)); if (!lock_page_or_retry(page, vma->vm_mm, vmf->flags)) { page_cache_release(page); return ret | VM_FAULT_RETRY; -- 1.8.3.2
|