From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932271AbbKDH6w (ORCPT ); Wed, 4 Nov 2015 02:58:52 -0500 Received: from mail-pa0-f50.google.com ([209.85.220.50]:34834 "EHLO mail-pa0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755139AbbKDH6u (ORCPT ); Wed, 4 Nov 2015 02:58:50 -0500 From: yalin wang To: tytso@mit.edu, adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org Cc: yalin wang Subject: [RFC] ext4: fix a BUG in ext4_mpage_readpages() Date: Wed, 4 Nov 2015 15:58:34 +0800 Message-Id: <1446623914-9367-1-git-send-email-yalin.wang2010@gmail.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The last block should be the total read pages last block, need adjust the block number when caculate every page. Signed-off-by: yalin wang --- fs/ext4/readpage.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ext4/readpage.c b/fs/ext4/readpage.c index 5dc5e95..d20c39d 100644 --- a/fs/ext4/readpage.c +++ b/fs/ext4/readpage.c @@ -174,7 +174,7 @@ int ext4_mpage_readpages(struct address_space *mapping, goto confused; block_in_file = (sector_t)page->index << (PAGE_CACHE_SHIFT - blkbits); - last_block = block_in_file + nr_pages * blocks_per_page; + last_block = block_in_file + (nr_pages - page_idx) * blocks_per_page; last_block_in_file = (i_size_read(inode) + blocksize - 1) >> blkbits; if (last_block > last_block_in_file) last_block = last_block_in_file; -- 1.9.1