From: Subject: patch ext4-mark-the-buffer_heads-as-dirty-and-uptodate-after-prepare_write.patch added to 2.6.27-stable tree Date: Wed, 03 Dec 2008 10:56:00 -0800 Message-ID: <20081203185925.BB6104904A@coco.kroah.org> References: <1226851540-8032-20-git-send-email-tytso@mit.edu> Cc: , To: aneesh.kumar@linux.vnet.ibm.com, gregkh@suse.de, linux-ext4@vger.kernel.org, tytso@mit.edu Return-path: Received: from kroah.org ([198.145.64.141]:60936 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752037AbYLCS70 (ORCPT ); Wed, 3 Dec 2008 13:59:26 -0500 In-Reply-To: <1226851540-8032-20-git-send-email-tytso@mit.edu> Sender: linux-ext4-owner@vger.kernel.org List-ID: This is a note to let you know that we have just queued up the patch titled Subject: ext4: Mark the buffer_heads as dirty and uptodate after prepare_write to the 2.6.27-stable tree. Its filename is ext4-mark-the-buffer_heads-as-dirty-and-uptodate-after-prepare_write.patch A git repo of this tree can be found at http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary >From tytso@mit.edu Wed Dec 3 10:44:57 2008 From: Aneesh Kumar K.V Date: Sun, 16 Nov 2008 11:05:39 -0500 Subject: ext4: Mark the buffer_heads as dirty and uptodate after prepare_write To: stable@kernel.org Cc: Ext4 Developers List , "Theodore Ts'o" , "Aneesh Kumar K.V" Message-ID: <1226851540-8032-20-git-send-email-tytso@mit.edu> From: Aneesh Kumar K.V (cherry picked from commit ed9b3e3379731e9f9d2f73f3d7fd9e7d2ce3df4a) We need to make sure we mark the buffer_heads as dirty and uptodate so that block_write_full_page write them correctly. This fixes mmap corruptions that can occur in low memory situations. Signed-off-by: Aneesh Kumar K.V Signed-off-by: "Theodore Ts'o" Signed-off-by: Greg Kroah-Hartman --- fs/ext4/inode.c | 2 ++ 1 file changed, 2 insertions(+) --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -2242,6 +2242,8 @@ static int ext4_da_writepage(struct page unlock_page(page); return 0; } + /* now mark the buffer_heads as dirty and uptodate */ + block_commit_write(page, 0, PAGE_CACHE_SIZE); } if (test_opt(inode->i_sb, NOBH) && ext4_should_writeback_data(inode)) Patches currently in stable-queue which might be from aneesh.kumar@linux.vnet.ibm.com are queue-2.6.27/ext4-elevate-write-count-for-migrate-ioctl.patch queue-2.6.27/ext4-free-ext4_prealloc_space-using-kmem_cache_free.patch queue-2.6.27/ext4-do-mballoc-init-before-doing-filesystem-recovery.patch queue-2.6.27/ext4-convert-to-host-order-before-using-the-values.patch queue-2.6.27/ext4-mark-the-buffer_heads-as-dirty-and-uptodate-after-prepare_write.patch