From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754794AbcFGLKS (ORCPT ); Tue, 7 Jun 2016 07:10:18 -0400 Received: from mga03.intel.com ([134.134.136.65]:3941 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161012AbcFGLBE (ORCPT ); Tue, 7 Jun 2016 07:01:04 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.26,432,1459839600"; d="scan'208";a="715177676" From: "Kirill A. Shutemov" To: Hugh Dickins , Andrea Arcangeli , Andrew Morton Cc: Dave Hansen , Vlastimil Babka , Christoph Lameter , Naoya Horiguchi , Jerome Marchand , Yang Shi , Sasha Levin , Andres Lagar-Cavilla , Ning Qu , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCHv9-rebased 20/32] truncate: handle file thp Date: Tue, 7 Jun 2016 14:00:34 +0300 Message-Id: <1465297246-98985-21-git-send-email-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1465297246-98985-1-git-send-email-kirill.shutemov@linux.intel.com> References: <1465222029-45942-1-git-send-email-kirill.shutemov@linux.intel.com> <1465297246-98985-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For shmem/tmpfs we only need to tweak truncate_inode_page() and invalidate_mapping_pages(). truncate_inode_pages_range() and invalidate_inode_pages2_range() are adjusted to use page_to_pgoff(). Signed-off-by: Kirill A. Shutemov --- mm/truncate.c | 28 +++++++++++++++++++++++----- 1 file changed, 23 insertions(+), 5 deletions(-) diff --git a/mm/truncate.c b/mm/truncate.c index 4064f8f53daa..a01cce450a26 100644 --- a/mm/truncate.c +++ b/mm/truncate.c @@ -155,10 +155,14 @@ 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_SIZE; if (page_mapped(page)) { unmap_mapping_range(mapping, (loff_t)page->index << PAGE_SHIFT, - PAGE_SIZE, 0); + holelen, 0); } return truncate_complete_page(mapping, page); } @@ -279,7 +283,7 @@ void truncate_inode_pages_range(struct address_space *mapping, if (!trylock_page(page)) continue; - WARN_ON(page->index != index); + WARN_ON(page_to_pgoff(page) != index); if (PageWriteback(page)) { unlock_page(page); continue; @@ -367,7 +371,7 @@ void truncate_inode_pages_range(struct address_space *mapping, } lock_page(page); - WARN_ON(page->index != index); + WARN_ON(page_to_pgoff(page) != index); wait_on_page_writeback(page); truncate_inode_page(mapping, page); unlock_page(page); @@ -487,7 +491,21 @@ 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); /* @@ -594,7 +612,7 @@ int invalidate_inode_pages2_range(struct address_space *mapping, } lock_page(page); - WARN_ON(page->index != index); + WARN_ON(page_to_pgoff(page) != index); if (page->mapping != mapping) { unlock_page(page); continue; -- 2.8.1