Btrfs: set page->private to the eb
We spend a lot of time looking up extent buffers from pages when we could just
store the pointer to the eb the page is associated with in page->private. This
patch does just that, and it makes things a little simpler and reduces a bit of
CPU overhead involved with doing metadata IO. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 4e38a3d..83e432d 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -127,6 +127,7 @@
unsigned long map_start;
unsigned long map_len;
unsigned long bflags;
+ struct extent_io_tree *tree;
atomic_t refs;
atomic_t pages_reading;
struct list_head leak_list;