3.2-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>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
fs/ext4/inode.c | 1 +
1 file changed, 1 insertion(+)
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1422,6 +1422,7 @@ 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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