ocfs2: temporarily remove extent map caching
The code in extent_map.c is not prepared to deal with a subtree being
rotated between lookups. This can happen when filling holes in sparse files.
Instead of a lengthy patch to update the code (which would likely lose the
benefit of caching subtree roots), we remove most of the algorithms and
implement a simple path based lookup. A less ambitious extent caching scheme
will be added in a later patch.
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 875c114..f3b0cc5 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -158,8 +158,7 @@
if (err)
goto bail;
- err = ocfs2_extent_map_get_blocks(inode, iblock, 1, &p_blkno,
- NULL);
+ err = ocfs2_extent_map_get_blocks(inode, iblock, &p_blkno, NULL);
if (err) {
mlog(ML_ERROR, "Error %d from get_blocks(0x%p, %llu, 1, "
"%llu, NULL)\n", err, inode, (unsigned long long)iblock,
@@ -499,8 +498,7 @@
down_read(&OCFS2_I(inode)->ip_alloc_sem);
}
- err = ocfs2_extent_map_get_blocks(inode, block, 1, &p_blkno,
- NULL);
+ err = ocfs2_extent_map_get_blocks(inode, block, &p_blkno, NULL);
if (!INODE_JOURNAL(inode)) {
up_read(&OCFS2_I(inode)->ip_alloc_sem);
@@ -574,7 +572,7 @@
/* This figures out the size of the next contiguous block, and
* our logical offset */
- ret = ocfs2_extent_map_get_blocks(inode, iblock, 1, &p_blkno,
+ ret = ocfs2_extent_map_get_blocks(inode, iblock, &p_blkno,
&contig_blocks);
if (ret) {
mlog(ML_ERROR, "get_blocks() failed iblock=%llu\n",