Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [ 06/16] ext4: init pagevec in ext4_da_block_invalidatepages | Date | Fri, 18 Jan 2013 17:21:44 -0800 |
| |
3.0-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eric Sandeen <sandeen@redhat.com>
commit 66bea92c69477a75a5d37b9bfed5773c92a3c4b4 upstream.
ext4_da_block_invalidatepages is missing a pagevec_init(), which means that pvec->cold contains random garbage.
This affects whether the page goes to the front or back of the LRU when ->cold makes it to free_hot_cold_page()
Reviewed-by: Lukas Czerner <lczerner@redhat.com> Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com> Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: CAI Qian <caiqian@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- fs/ext4/inode.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -2199,6 +2199,8 @@ static void ext4_da_block_invalidatepage index = mpd->first_page; end = mpd->next_page - 1; + + pagevec_init(&pvec, 0); while (index <= end) { nr_pages = pagevec_lookup(&pvec, mapping, index, PAGEVEC_SIZE); if (nr_pages == 0)
| |