From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cantor2.suse.de ([195.135.220.15]:57160 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755029AbaKNKdW (ORCPT ); Fri, 14 Nov 2014 05:33:22 -0500 Received: from relay1.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 5A6E8AD1E for ; Fri, 14 Nov 2014 10:33:21 +0000 (UTC) From: David Sterba To: linux-btrfs@vger.kernel.org Cc: David Sterba Subject: [PATCH 6/6] btrfs: move commit out of sysfs when changing label Date: Fri, 14 Nov 2014 11:33:21 +0100 Message-Id: In-Reply-To: References: Sender: linux-btrfs-owner@vger.kernel.org List-ID: Signed-off-by: David Sterba --- fs/btrfs/sysfs.c | 21 ++++++++------------- 1 file changed, 8 insertions(+), 13 deletions(-) diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index 226f7261533a..92db3f648df4 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -369,9 +369,6 @@ static ssize_t btrfs_label_store(struct kobject *kobj, const char *buf, size_t len) { struct btrfs_fs_info *fs_info = to_fs_info(kobj); - struct btrfs_trans_handle *trans; - struct btrfs_root *root = fs_info->fs_root; - int ret; size_t p_len; if (fs_info->sb->s_flags & MS_RDONLY) @@ -386,20 +383,18 @@ static ssize_t btrfs_label_store(struct kobject *kobj, if (p_len >= BTRFS_LABEL_SIZE) return -EINVAL; - trans = btrfs_start_transaction(root, 0); - if (IS_ERR(trans)) - return PTR_ERR(trans); - - spin_lock(&root->fs_info->super_lock); + spin_lock(&fs_info->super_lock); memset(fs_info->super_copy->label, 0, BTRFS_LABEL_SIZE); memcpy(fs_info->super_copy->label, buf, p_len); - spin_unlock(&root->fs_info->super_lock); - ret = btrfs_commit_transaction(trans, root); + spin_unlock(&fs_info->super_lock); - if (!ret) - return len; + /* + * We don't want to do full transaction commit from inside sysfs + */ + btrfs_set_pending(fs_info, COMMIT); + wake_up_process(fs_info->transaction_kthread); - return ret; + return len; } BTRFS_ATTR_RW(label, btrfs_label_show, btrfs_label_store); -- 1.8.4.5