bcache: Write out full stripes
Now that we're tracking dirty data per stripe, we can add two
optimizations for raid5/6:
* If a stripe is already dirty, force writes to that stripe to
writeback mode - to help build up full stripes of dirty data
* When flushing dirty data, preferentially write out full stripes first
if there are any.
Signed-off-by: Kent Overstreet <koverstreet@google.com>
diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h
index dbddef0..342ba86 100644
--- a/drivers/md/bcache/bcache.h
+++ b/drivers/md/bcache/bcache.h
@@ -387,8 +387,6 @@
typedef bool (keybuf_pred_fn)(struct keybuf *, struct bkey *);
struct keybuf {
- keybuf_pred_fn *key_predicate;
-
struct bkey last_scanned;
spinlock_t lock;
@@ -532,6 +530,7 @@
unsigned sequential_merge:1;
unsigned verify:1;
+ unsigned partial_stripes_expensive:1;
unsigned writeback_metadata:1;
unsigned writeback_running:1;
unsigned char writeback_percent;