From: "Kirill A. Shutemov" Subject: [PATCHv4 28/43] truncate: make invalidate_inode_pages2_range() aware about huge pages Date: Tue, 25 Oct 2016 03:13:27 +0300 Message-ID: <20161025001342.76126-29-kirill.shutemov@linux.intel.com> References: <20161025001342.76126-1-kirill.shutemov@linux.intel.com> Cc: Alexander Viro , Hugh Dickins , Andrea Arcangeli , Dave Hansen , Vlastimil Babka , Matthew Wilcox , Ross Zwisler , linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-block@vger.kernel.org, "Kirill A. Shutemov" To: "Theodore Ts'o" , Andreas Dilger , Jan Kara , Andrew Morton Return-path: In-Reply-To: <20161025001342.76126-1-kirill.shutemov@linux.intel.com> Sender: owner-linux-mm@kvack.org List-Id: linux-ext4.vger.kernel.org For huge pages we need to unmap whole range covered by the huge page. Signed-off-by: Kirill A. Shutemov --- mm/truncate.c | 27 +++++++++++++++++++-------- 1 file changed, 19 insertions(+), 8 deletions(-) diff --git a/mm/truncate.c b/mm/truncate.c index 7bb9d197a9e8..59bc1b4260d1 100644 --- a/mm/truncate.c +++ b/mm/truncate.c @@ -693,27 +693,34 @@ int invalidate_inode_pages2_range(struct address_space *mapping, continue; } wait_on_page_writeback(page); + page = compound_head(page); + if (page_mapped(page)) { + loff_t begin, len; + + begin = page->index << PAGE_SHIFT; + if (!did_range_unmap) { /* * Zap the rest of the file in one hit. */ + len = (loff_t)(1 + end - page->index) << + PAGE_SHIFT; + if (len < hpage_size(page)) + len = hpage_size(page); unmap_mapping_range(mapping, - (loff_t)index << PAGE_SHIFT, - (loff_t)(1 + end - index) - << PAGE_SHIFT, - 0); + begin, len, 0); did_range_unmap = 1; } else { /* * Just zap this page */ - unmap_mapping_range(mapping, - (loff_t)index << PAGE_SHIFT, - PAGE_SIZE, 0); + len = hpage_size(page); + unmap_mapping_range(mapping, begin, + len, 0 ); } } - BUG_ON(page_mapped(page)); + VM_BUG_ON_PAGE(page_mapped(page), page); ret2 = do_launder_page(mapping, page); if (ret2 == 0) { if (!invalidate_complete_page2(mapping, page)) @@ -722,6 +729,10 @@ int invalidate_inode_pages2_range(struct address_space *mapping, if (ret2 < 0) ret = ret2; unlock_page(page); + if (PageTransHuge(page)) { + index = page->index + HPAGE_PMD_NR - 1; + break; + } } pagevec_remove_exceptionals(&pvec); pagevec_release(&pvec); -- 2.9.3 -- 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