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| author | Tao Ma <tao.ma@oracle.com> | 2008-08-18 17:38:52 +0800 |
|---|---|---|
| committer | Mark Fasheh <mfasheh@suse.com> | 2008-10-13 16:57:03 -0700 |
| commit | ca12b7c48942d21b2e7890b820db9d578bc291cd (patch) | |
| tree | e051e6ceb77a05db7dd1d749d7f3f1682c69196c /fs/ocfs2/alloc.h | |
| parent | 589dc2602f2a1b7fa5e59b90f548af189f128d77 (diff) | |
| download | lwn-ca12b7c48942d21b2e7890b820db9d578bc291cd.tar.gz lwn-ca12b7c48942d21b2e7890b820db9d578bc291cd.zip | |
ocfs2: Optionally limit extent size in ocfs2_insert_extent()
In xattr bucket, we want to limit the maximum size of a btree leaf,
otherwise we'll lose the benefits of hashing because we'll have to search
large leaves.
So add a new field in ocfs2_extent_tree which indicates the maximum leaf cluster
size we want so that we can prevent ocfs2_insert_extent() from merging the leaf
record even if it is contiguous with an adjacent record.
Other btree types are not affected by this change.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Diffstat (limited to 'fs/ocfs2/alloc.h')
| -rw-r--r-- | fs/ocfs2/alloc.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/ocfs2/alloc.h b/fs/ocfs2/alloc.h index cd4e12d2b6b9..23c695ddaa52 100644 --- a/fs/ocfs2/alloc.h +++ b/fs/ocfs2/alloc.h @@ -32,6 +32,11 @@ enum ocfs2_extent_tree_type { OCFS2_XATTR_TREE_EXTENT, }; +/* + * For xattr tree leaf, we limit the leaf byte size to be 64K. + */ +#define OCFS2_MAX_XATTR_TREE_LEAF_SIZE 65536 + struct ocfs2_alloc_context; int ocfs2_dinode_insert_extent(struct ocfs2_super *osb, handle_t *handle, |