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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 <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>
Cc: stable@vger.kernel.org
This commit is contained in:
Eric Sandeen 2012-11-14 22:22:05 -05:00 committed by Theodore Ts'o
parent c6af8803cd
commit 66bea92c69
1 changed files with 1 additions and 0 deletions
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1
fs/ext4/inode.c
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@ -1482,6 +1482,7 @@ static void ext4_da_block_invalidatepages(struct mpage_da_data *mpd)
last = end << (PAGE_CACHE_SHIFT - inode->i_blkbits);
ext4_es_remove_extent(inode, start, last - start + 1);
pagevec_init(&pvec, 0);
while (index <= end) {
nr_pages = pagevec_lookup(&pvec, mapping, index, PAGEVEC_SIZE);
if (nr_pages == 0)