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| author | Wang Shilong <wangsl.fnst@cn.fujitsu.com> | 2013-12-04 21:16:53 +0800 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2014-01-28 13:19:53 -0800 |
| commit | cb7ab02156e4ba999df90e9fa8e96107683586fd (patch) | |
| tree | 3557996fdee5e02bfd5f921aa1522fa87f54687c /fs/btrfs/transaction.c | |
| parent | 3cb0929ad24c95c5fd8f08eb41a702a65954b4c6 (diff) | |
| download | op-kernel-dev-cb7ab02156e4ba999df90e9fa8e96107683586fd.zip op-kernel-dev-cb7ab02156e4ba999df90e9fa8e96107683586fd.tar.gz | |
Btrfs: wrap repeated code into scrub_blocked_if_needed()
Just wrap same code into one function scrub_blocked_if_needed().
This make a change that we will move waiting (@workers_pending = 0)
before we can wake up commiting transaction(atomic_inc(@scrub_paused)),
we must take carefully to not deadlock here.
Thread 1 Thread 2
|->btrfs_commit_transaction()
|->set trans type(COMMIT_DOING)
|->btrfs_scrub_paused()(blocked)
|->join_transaction(blocked)
Move btrfs_scrub_paused() before setting trans type which means we can
still join a transaction when commiting_transaction is blocked.
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Suggested-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/transaction.c')
| -rw-r--r-- | fs/btrfs/transaction.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 1451637..026f1fe 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -1748,6 +1748,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, goto cleanup_transaction; btrfs_wait_delalloc_flush(root->fs_info); + + btrfs_scrub_pause(root); /* * Ok now we need to make sure to block out any other joins while we * commit the transaction. We could have started a join before setting @@ -1812,7 +1814,6 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, WARN_ON(cur_trans != trans->transaction); - btrfs_scrub_pause(root); /* btrfs_commit_tree_roots is responsible for getting the * various roots consistent with each other. Every pointer * in the tree of tree roots has to point to the most up to date |
