bcache: Track dirty data by stripe
To make background writeback aware of raid5/6 stripes, we first need to
track the amount of dirty data within each stripe - we do this by
breaking up the existing sectors_dirty into per stripe atomic_ts
Signed-off-by: Kent Overstreet <koverstreet@google.com>
diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h
index d099d88..dbddef0 100644
--- a/drivers/md/bcache/bcache.h
+++ b/drivers/md/bcache/bcache.h
@@ -437,7 +437,10 @@
/* If nonzero, we're detaching/unregistering from cache set */
atomic_t detaching;
- atomic_long_t sectors_dirty;
+ uint64_t nr_stripes;
+ unsigned stripe_size_bits;
+ atomic_t *stripe_sectors_dirty;
+
unsigned long sectors_dirty_last;
long sectors_dirty_derivative;
@@ -1159,9 +1162,6 @@
/* Forward declarations */
-void bch_writeback_queue(struct cached_dev *);
-void bch_writeback_add(struct cached_dev *, unsigned);
-
void bch_count_io_errors(struct cache *, int, const char *);
void bch_bbio_count_io_errors(struct cache_set *, struct bio *,
int, const char *);
@@ -1224,8 +1224,6 @@
struct cache_set *bch_cache_set_alloc(struct cache_sb *);
void bch_btree_cache_free(struct cache_set *);
int bch_btree_cache_alloc(struct cache_set *);
-void bch_sectors_dirty_init(struct cached_dev *);
-void bch_cached_dev_writeback_init(struct cached_dev *);
void bch_moving_init_cache_set(struct cache_set *);
int bch_cache_allocator_start(struct cache *ca);