From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f50.google.com (mail-pa0-f50.google.com [209.85.220.50]) by kanga.kvack.org (Postfix) with ESMTP id B4C2E828E2 for ; Thu, 3 Mar 2016 11:59:05 -0500 (EST) Received: by mail-pa0-f50.google.com with SMTP id fy10so17690220pac.1 for ; Thu, 03 Mar 2016 08:59:05 -0800 (PST) Received: from mga14.intel.com (mga14.intel.com. [192.55.52.115]) by mx.google.com with ESMTP id f63si66596958pfj.137.2016.03.03.08.52.40 for ; Thu, 03 Mar 2016 08:52:41 -0800 (PST) From: "Kirill A. Shutemov" Subject: [PATCHv3 25/29] truncate: handle file thp Date: Thu, 3 Mar 2016 19:52:15 +0300 Message-Id: <1457023939-98083-26-git-send-email-kirill.shutemov@linux.intel.com> In-Reply-To: <1457023939-98083-1-git-send-email-kirill.shutemov@linux.intel.com> References: <1457023939-98083-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: Hugh Dickins , Andrea Arcangeli , Andrew Morton Cc: Dave Hansen , Vlastimil Babka , Christoph Lameter , Naoya Horiguchi , Jerome Marchand , Yang Shi , Sasha Levin , linux-kernel@vger.kernel.org, linux-mm@kvack.org, "Kirill A. Shutemov" For shmem/tmpfs we only need to tweak truncate_inode_page() and invalidate_mapping_pages(). Signed-off-by: Kirill A. Shutemov --- mm/truncate.c | 22 ++++++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) diff --git a/mm/truncate.c b/mm/truncate.c index 7598b552ae03..40d3730a8e62 100644 --- a/mm/truncate.c +++ b/mm/truncate.c @@ -157,10 +157,14 @@ invalidate_complete_page(struct address_space *mapping, struct page *page) int truncate_inode_page(struct address_space *mapping, struct page *page) { + loff_t holelen; + VM_BUG_ON_PAGE(PageTail(page), page); + + holelen = PageTransHuge(page) ? HPAGE_PMD_SIZE : PAGE_CACHE_SIZE; if (page_mapped(page)) { unmap_mapping_range(mapping, (loff_t)page->index << PAGE_CACHE_SHIFT, - PAGE_CACHE_SIZE, 0); + holelen, 0); } return truncate_complete_page(mapping, page); } @@ -489,7 +493,21 @@ unsigned long invalidate_mapping_pages(struct address_space *mapping, if (!trylock_page(page)) continue; - WARN_ON(page->index != index); + + WARN_ON(page_to_pgoff(page) != index); + + /* Middle of THP: skip */ + if (PageTransTail(page)) { + unlock_page(page); + continue; + } else if (PageTransHuge(page)) { + index += HPAGE_PMD_NR - 1; + i += HPAGE_PMD_NR - 1; + /* 'end' is in the middle of THP */ + if (index == round_down(end, HPAGE_PMD_NR)) + continue; + } + ret = invalidate_inode_page(page); unlock_page(page); /* -- 2.7.0 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org