diff options
| author | Chris Mason <chris.mason@oracle.com> | 2008-06-09 09:35:50 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 11:04:03 -0400 |
| commit | 48ec2cf8738b0db53dc8361026cb7a328f7ad386 (patch) | |
| tree | adcb56cf494b67c578a5032b3454203c21171419 | |
| parent | e1b81e6761bd8419146d4bbe0aadd8b2d348a01c (diff) | |
Btrfs: Fix race in running_transaction checks
When a new transaction was started, the code would incorrectly
set the pointer in fs_info before all the data structures were setup.
fsync heavy workloads hit races on the setup of the ordered inode spinlock
Signed-off-by: Chris Mason <chris.mason@oracle.com>
| -rw-r--r-- | fs/btrfs/transaction.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 57746c11eae..1cb084efd6e 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -56,7 +56,6 @@ static noinline int join_transaction(struct btrfs_root *root) total_trans++; BUG_ON(!cur_trans); root->fs_info->generation++; - root->fs_info->running_transaction = cur_trans; root->fs_info->last_alloc = 0; root->fs_info->last_data_alloc = 0; cur_trans->num_writers = 1; @@ -74,6 +73,9 @@ static noinline int join_transaction(struct btrfs_root *root) extent_io_tree_init(&cur_trans->dirty_pages, root->fs_info->btree_inode->i_mapping, GFP_NOFS); + spin_lock(&root->fs_info->new_trans_lock); + root->fs_info->running_transaction = cur_trans; + spin_unlock(&root->fs_info->new_trans_lock); } else { cur_trans->num_writers++; cur_trans->num_joined++; |