Hello Ted,
This back-port patch is adjusted the context to apply for the 3.0.x,
3.4.x and 3.7.x stable. Please help ACK/NAK it if possible.
Regards,
CAI Qian
>From 66bea92c69477a75a5d37b9bfed5773c92a3c4b4 Mon Sep 17 00:00:00 2001
From: Eric Sandeen <sand...@redhat.com>
Date: Wed, 14 Nov 2012 22:22:05 -0500
Subject: [PATCH] ext4: init pagevec in ext4_da_block_invalidatepages
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>
Cc: stable@vger.kernel.org
Signed-off-by: CAI Qian <caiq...@redhat.com>
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index b3c243b..f89c0e5 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1503,6 +1503,8 @@ 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)
--
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