From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Kirill A. Shutemov" Subject: [PATCHv3, RFC 13/34] thp, mm: trigger bug in replace_page_cache_page() on THP Date: Fri, 5 Apr 2013 14:59:37 +0300 Message-ID: <1365163198-29726-14-git-send-email-kirill.shutemov@linux.intel.com> References: <1365163198-29726-1-git-send-email-kirill.shutemov@linux.intel.com> Cc: Al Viro , Hugh Dickins , Wu Fengguang , Jan Kara , Mel Gorman , linux-mm@kvack.org, Andi Kleen , Matthew Wilcox , "Kirill A. Shutemov" , Hillf Danton , Dave Hansen , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" To: Andrea Arcangeli , Andrew Morton Return-path: In-Reply-To: <1365163198-29726-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org From: "Kirill A. Shutemov" replace_page_cache_page() is only used by FUSE. It's unlikely that we will support THP in FUSE page cache any soon. Let's pospone implemetation of THP handling in replace_page_cache_page() until any will use it. Signed-off-by: Kirill A. Shutemov --- mm/filemap.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/filemap.c b/mm/filemap.c index 56a81e3..1defa83 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -412,6 +412,8 @@ int replace_page_cache_page(struct page *old, struct page *new, gfp_t gfp_mask) { int error; + VM_BUG_ON(PageTransHuge(old)); + VM_BUG_ON(PageTransHuge(new)); VM_BUG_ON(!PageLocked(old)); VM_BUG_ON(!PageLocked(new)); VM_BUG_ON(new->mapping); -- 1.7.10.4