ext2fs: Fix optimization bug for doubly-indirect block pointers
Doubly-indirect block numbers are compared against the first-level
indirect block when checking for a cached copy. This is causing the
doubly-indirect block to be re-read each time it is accessed.
Repairing this reduces load time for a 70M file from 72 seconds
to 38 seconds.
Signed-off-by: Aaron Pace <Aaron.Pace@alcatel-lucent.com>
diff --git a/fs/ext2/ext2fs.c b/fs/ext2/ext2fs.c
index 4b391d6..a88cf87 100644
--- a/fs/ext2/ext2fs.c
+++ b/fs/ext2/ext2fs.c
@@ -364,7 +364,7 @@
indir2_size = blksz;
}
if ((__le32_to_cpu (indir1_block[rblock / perblock]) <<
- log2_blksz) != indir1_blkno) {
+ log2_blksz) != indir2_blkno) {
status = ext2fs_devread (__le32_to_cpu(indir1_block[rblock / perblock]) << log2_blksz,
0, blksz,
(char *) indir2_block);