3.0-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eric Sandeen <sand...@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 <lczer...@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiol...@redhat.com>
Signed-off-by: Eric Sandeen <sand...@redhat.com>
Signed-off-by: "Theodore Ts'o" <ty...@mit.edu>
Signed-off-by: CAI Qian <caiq...@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gre...@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)
--
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