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Date: Fri, 5 Apr 2013 14:59:47 +0300 From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com> To: Andrea Arcangeli <aarcange@...hat.com>, Andrew Morton <akpm@...ux-foundation.org> Cc: Al Viro <viro@...iv.linux.org.uk>, Hugh Dickins <hughd@...gle.com>, Wu Fengguang <fengguang.wu@...el.com>, Jan Kara <jack@...e.cz>, Mel Gorman <mgorman@...e.de>, linux-mm@...ck.org, Andi Kleen <ak@...ux.intel.com>, Matthew Wilcox <matthew.r.wilcox@...el.com>, "Kirill A. Shutemov" <kirill@...temov.name>, Hillf Danton <dhillf@...il.com>, Dave Hansen <dave@...1.net>, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com> Subject: [PATCHv3, RFC 23/34] thp, mm: split huge page on mmap file page From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com> We are not ready to mmap file-backed tranparent huge pages. Let's split them on fault attempt. Later in the patchset we'll implement mmap() properly and this code path be used for fallback cases. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com> --- mm/filemap.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/filemap.c b/mm/filemap.c index 3296f5c..6f0e3be 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1683,6 +1683,8 @@ 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; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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