From: Mateusz Guzik <mjguzik@gmail.com>
Date: Tue, 11 Jun 2024 17:38:23 +0000 (+0200)
Subject: btrfs: use iget5_locked_rcu
X-Git-Tag: v6.11-rc1~237^2~6
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=3a8e2f99f18d69389366e16375e9a0e41ed43779;p=thirdparty%2Flinux.git

btrfs: use iget5_locked_rcu

With 20 threads each walking a dedicated 1000 dirs * 1000 files
directory tree to stat(2) on a 32 core + 24GB ram vm:

before: 3.54s user 892.30s system 1966% cpu 45.549 total
after:  3.28s user 738.66s system 1955% cpu 37.932 total (-16.7%)

Benchmark can be found here: https://people.freebsd.org/~mjg/fstree.tgz

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://lore.kernel.org/r/20240611173824.535995-3-mjguzik@gmail.com
Acked-by: David Sterba <dsterba@suse.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
---

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 753db965f7c04..cbb2c92b6c084 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -5587,7 +5587,7 @@ static struct inode *btrfs_iget_locked(struct super_block *s, u64 ino,
 	args.ino = ino;
 	args.root = root;
 
-	inode = iget5_locked(s, hashval, btrfs_find_actor,
+	inode = iget5_locked_rcu(s, hashval, btrfs_find_actor,
 			     btrfs_init_locked_inode,
 			     (void *)&args);
 	return inode;