Btrfs: Allocator fix variety pack
* Force chunk allocation when find_free_extent has to do a full scan
* Record the max key at the start of defrag so it doesn't run forever
* Block groups might not be contiguous, make a forward search for the
next block group in extent-tree.c
* Get rid of extra checks for total fs size
* Fix relocate_one_reference to avoid relocating the same file data block
twice when referenced by an older transaction
* Use the open device count when allocating chunks so that we don't
try to allocate from devices that don't exist
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 293464c..7b73a9c 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -464,6 +464,7 @@
u64 bytes_used;
u64 bytes_pinned;
int full;
+ int force_alloc;
struct list_head list;
};
@@ -589,6 +590,7 @@
int ref_cows;
int track_dirty;
struct btrfs_key defrag_progress;
+ struct btrfs_key defrag_max;
int defrag_running;
int defrag_level;
char *name;