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Commit 6c336b21 authored by Jeff Mahoney's avatar Jeff Mahoney Committed by David Sterba
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btrfs: add a node counter to each of the rbtrees 



This patch adds counters to each of the rbtrees so that we can tell
how large they are growing for a given workload.  These counters
will be exported by tracepoints in the next patch.

Signed-off-by: default avatarJeff Mahoney <jeffm@suse.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 86d5f994

fs/btrfs/backref.c

+5 −1
Original line number Diff line number Diff line
@@ -136,9 +136,10 @@ struct prelim_ref { 


struct preftree {

	struct rb_root root;

	unsigned int count;

};



#define PREFTREE_INIT	{ .root = RB_ROOT }

#define PREFTREE_INIT	{ .root = RB_ROOT, .count = 0 }



struct preftrees {

	struct preftree direct;    /* BTRFS_SHARED_[DATA|BLOCK]_REF_KEY */
@@ -248,6 +249,7 @@ static void prelim_ref_insert(struct preftree *preftree, 
		}

	}



	preftree->count++;

	rb_link_node(&newref->rbnode, parent, p);

	rb_insert_color(&newref->rbnode, root);

}
@@ -265,6 +267,7 @@ static void prelim_release(struct preftree *preftree) 
		free_pref(ref);



	preftree->root = RB_ROOT;

	preftree->count = 0;

}



/*
@@ -608,6 +611,7 @@ static int resolve_indirect_refs(struct btrfs_fs_info *fs_info, 
		}



		rb_erase(&ref->rbnode, &preftrees->indirect.root);

		preftrees->indirect.count--;



		if (ref->count == 0) {

			free_pref(ref);