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authorEric Sandeen <sandeen@redhat.com>2012-11-14 22:22:05 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-01-21 11:45:24 -0800
commit5c9611090f9d110a245cc54ddb9bb31b2cc2965f (patch)
treef57537a8ab8c94fe9a7eb4532872f36efa48d0a1
parentee415da5538413edc5d63c07899abc0b2b36bc54 (diff)
downloadlinux-linaro-stable-5c9611090f9d110a245cc54ddb9bb31b2cc2965f.tar.gz
ext4: init pagevec in ext4_da_block_invalidatepages
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>
-rw-r--r--fs/ext4/inode.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index dcd08e4..a0d7e26 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1424,6 +1424,8 @@ static void ext4_da_block_invalidatepages(struct mpage_da_data *mpd)
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)