diff mbox

[v2,7/7] Btrfs: incremental send, avoid the overhead of allocating an orphan_dir_info object unnecessarily

Message ID 1434964128-31757-8-git-send-email-robbieko@synology.com (mailing list archive)
State New, archived
Headers show

Commit Message

robbieko June 22, 2015, 9:08 a.m. UTC 
Avoid the overhead of allocating an orphan_dir_info object unnecessarily.

Signed-off-by: Robbie Ko <robbieko@synology.com>
---
 fs/btrfs/send.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)
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Patch

diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 579a4c8..9c60421 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -2785,12 +2785,6 @@  add_orphan_dir_info(struct send_ctx *sctx, u64 dir_ino)
 	struct rb_node *parent = NULL;
 	struct orphan_dir_info *entry, *odi;
 
-	odi = kmalloc(sizeof(*odi), GFP_NOFS);
-	if (!odi)
-		return ERR_PTR(-ENOMEM);
-	odi->ino = dir_ino;
-	odi->gen = 0;
-
 	while (*p) {
 		parent = *p;
 		entry = rb_entry(parent, struct orphan_dir_info, node);
@@ -2799,11 +2793,16 @@  add_orphan_dir_info(struct send_ctx *sctx, u64 dir_ino)
 		} else if (dir_ino > entry->ino) {
 			p = &(*p)->rb_right;
 		} else {
-			kfree(odi);
 			return entry;
 		}
 	}
 
+	odi = kmalloc(sizeof(*odi), GFP_NOFS);
+	if (!odi)
+		return ERR_PTR(-ENOMEM);
+	odi->ino = dir_ino;
+	odi->gen = 0;
+
 	rb_link_node(&odi->node, parent, p);
 	rb_insert_color(&odi->node, &sctx->orphan_dirs);
 	return odi;