From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from userp1040.oracle.com ([156.151.31.81]:30629 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1946060AbbGQItw (ORCPT ); Fri, 17 Jul 2015 04:49:52 -0400 Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id t6H8nqsj031797 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Fri, 17 Jul 2015 08:49:52 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userv0022.oracle.com (8.13.8/8.13.8) with ESMTP id t6H8npgH023198 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL) for ; Fri, 17 Jul 2015 08:49:51 GMT Received: from abhmp0019.oracle.com (abhmp0019.oracle.com [141.146.116.25]) by aserv0121.oracle.com (8.13.8/8.13.8) with ESMTP id t6H8ngrr004039 for ; Fri, 17 Jul 2015 08:49:51 GMT From: Liu Bo To: linux-btrfs@vger.kernel.org Subject: [PATCH 1/2] Btrfs: move kobj stuff out of dev_replace lock range Date: Fri, 17 Jul 2015 16:49:18 +0800 Message-Id: <1437122959-23376-1-git-send-email-bo.li.liu@oracle.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: To avoid deadlock described in commit 084b6e7c7607 ("btrfs: Fix a lockdep warning when running xfstest."), we should move kobj stuff out of dev_replace lock range. Signed-off-by: Liu Bo --- fs/btrfs/dev-replace.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c index 862fbc2..9eb1401 100644 --- a/fs/btrfs/dev-replace.c +++ b/fs/btrfs/dev-replace.c @@ -376,10 +376,6 @@ int btrfs_dev_replace_start(struct btrfs_root *root, WARN_ON(!tgt_device); dev_replace->tgtdev = tgt_device; - ret = btrfs_kobj_add_device(tgt_device->fs_devices, tgt_device); - if (ret) - btrfs_error(root->fs_info, ret, "kobj add dev failed"); - printk_in_rcu(KERN_INFO "BTRFS: dev_replace from %s (devid %llu) to %s started\n", src_device->missing ? "" : @@ -402,6 +398,10 @@ int btrfs_dev_replace_start(struct btrfs_root *root, args->result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR; btrfs_dev_replace_unlock(dev_replace); + ret = btrfs_kobj_add_device(tgt_device->fs_devices, tgt_device); + if (ret) + btrfs_error(root->fs_info, ret, "kobj add dev failed"); + btrfs_wait_ordered_roots(root->fs_info, -1); /* force writing the updated state information to disk */ -- 2.1.0