Btrfs-progs: fsck: reduce memory usage of extent record struct

Two changes:
	1.use bit filed for @found_rec
	2.u32 is enough to calculate duplicate extent number.

Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>

diff --git a/cmds-check.c b/cmds-check.c
index 72f3718..39a0869 100644 (file)
--- a/cmds-check.c
+++ b/cmds-check.c
@@ -92,7 +92,6 @@ struct extent_record {
        struct list_head list;
        struct cache_extent cache;
        struct btrfs_disk_key parent_key;
-       unsigned int found_rec;
        u64 start;
        u64 max_size;
        u64 nr;
@@ -101,8 +100,9 @@ struct extent_record {
        u64 generation;
        u64 parent_generation;
        u64 info_objectid;
-       u64 num_duplicates;
+       u32 num_duplicates;
        u8 info_level;
+       unsigned int found_rec:1;
        unsigned int content_checked:1;
        unsigned int owner_ref_checked:1;
        unsigned int is_root:1;
@@ -2737,7 +2737,7 @@ static int add_extent_rec(struct cache_tree *extent_cache,
        rec->start = start;
        rec->max_size = max_size;
        rec->nr = max(nr, max_size);
-       rec->found_rec = extent_rec;
+       rec->found_rec = !!extent_rec;
        rec->content_checked = 0;
        rec->owner_ref_checked = 0;
        rec->num_duplicates = 0;