From: Andi Kleen <ak@xxxxxxxxxxxxxxx> Based on a suggestion from Josef Bacik. The btrfs inode lookup already does a quick check for xattrs. If it doesn't find any and the file is not sgid set the NOSEC flag. This avoids a xattr lookup on the first write. v2: Use helper Cc: josef@xxxxxxxxxx Cc: chris.mason@xxxxxxxxxx Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx> --- fs/btrfs/inode.c | 8 +++++++- 1 files changed, 7 insertions(+), 1 deletions(-) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 7cd8ab0..20cecb8 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -2544,8 +2544,10 @@ static void btrfs_read_locked_inode(struct inode *inode) * any xattrs or acls */ maybe_acls = acls_after_inode_item(leaf, path->slots[0], inode->i_ino); - if (!maybe_acls) + if (!maybe_acls) { cache_no_acl(inode); + inode_has_no_xattr(inode); + } BTRFS_I(inode)->block_group = btrfs_find_block_group(root, 0, alloc_group_block, 0); @@ -4616,6 +4618,10 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans, (BTRFS_I(dir)->flags & BTRFS_INODE_NODATACOW)) BTRFS_I(inode)->flags |= BTRFS_INODE_NODATACOW; } + /* + * A new inode has no xattrs yet. + */ + inode_has_no_xattr(inode); insert_inode_hash(inode); inode_tree_add(inode); -- 1.7.4.4 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html