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| author | Ingo Molnar <mingo@kernel.org> | 2015-02-04 07:53:17 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-02-04 07:53:17 +0100 |
| commit | 2622e849a1d3d3ef531d1cc33308bb7fd00eee40 (patch) | |
| tree | f2be9d9f08444cb93b3a8f87099fe4ff8ac3cd57 /fs/btrfs/super.c | |
| parent | 996636ddae5cab8883bd76b996cd4f2ea9a152be (diff) | |
| parent | e36f014edff70fc02b3d3d79cead1d58f289332e (diff) | |
| download | kernel_replicant_linux-2622e849a1d3d3ef531d1cc33308bb7fd00eee40.tar.gz kernel_replicant_linux-2622e849a1d3d3ef531d1cc33308bb7fd00eee40.tar.bz2 kernel_replicant_linux-2622e849a1d3d3ef531d1cc33308bb7fd00eee40.zip | |
Merge tag 'v3.19-rc7' into locking/core, to refresh the branch before applying new changes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'fs/btrfs/super.c')
| -rw-r--r-- | fs/btrfs/super.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 60f7cbe815e9..6f49b2872a64 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1000,10 +1000,20 @@ int btrfs_sync_fs(struct super_block *sb, int wait) */ if (fs_info->pending_changes == 0) return 0; + /* + * A non-blocking test if the fs is frozen. We must not + * start a new transaction here otherwise a deadlock + * happens. The pending operations are delayed to the + * next commit after thawing. + */ + if (__sb_start_write(sb, SB_FREEZE_WRITE, false)) + __sb_end_write(sb, SB_FREEZE_WRITE); + else + return 0; trans = btrfs_start_transaction(root, 0); - } else { - return PTR_ERR(trans); } + if (IS_ERR(trans)) + return PTR_ERR(trans); } return btrfs_commit_transaction(trans, root); } |