bcachefs: Allocator prefers not to expand mi.btree_allocated bitmap
We now have a small bitmap in the member info section of the superblock
for "regions that have btree nodes", so that if we ever have to scan for
btree nodes in repair we don't have to scan the whole device(s).
This tweaks the allocator to prefer allocating from regions that are
already marked in this bitmap.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
diff --git a/fs/bcachefs/alloc_types.h b/fs/bcachefs/alloc_types.h
index c2226e9..9bbb28e 100644
--- a/fs/bcachefs/alloc_types.h
+++ b/fs/bcachefs/alloc_types.h
@@ -9,11 +9,18 @@
#include "fifo.h"
struct bucket_alloc_state {
+ enum {
+ BTREE_BITMAP_NO,
+ BTREE_BITMAP_YES,
+ BTREE_BITMAP_ANY,
+ } btree_bitmap;
+
u64 buckets_seen;
u64 skipped_open;
u64 skipped_need_journal_commit;
u64 skipped_nocow;
u64 skipped_nouse;
+ u64 skipped_mi_btree_bitmap;
};
#define BCH_WATERMARKS() \
