diff mbox series

[v4,2/2] btrfs: use iget5_locked_rcu

Message ID 20240611173824.535995-3-mjguzik@gmail.com (mailing list archive)
State New, archived
Headers show
Series rcu-based inode lookup for iget* | expand

Commit Message

Mateusz Guzik June 11, 2024, 5:38 p.m. UTC 
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>
---
 fs/btrfs/inode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

David Sterba June 12, 2024, 6:33 p.m. UTC | #1 
On Tue, Jun 11, 2024 at 07:38:23PM +0200, Mateusz Guzik wrote:
> 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>

Acked-by: David Sterba <dsterba@suse.com>
diff mbox series

Patch

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 4883cb512379..457d2c18d071 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -5588,7 +5588,7 @@  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;