| Date | Wed, 3 Dec 2008 11:56:44 -0800 | From | Greg KH <> | Subject | [patch 097/104] ext4: Mark the buffer_heads as dirty and uptodate after prepare_write |
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2.6.27-stable review patch. If anyone has any objections, please let us know.
------------------ From: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
(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 <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- 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))
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