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| author | Chris Mason <chris.mason@oracle.com> | 2008-06-25 16:01:31 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 11:04:03 -0400 |
| commit | 89ce8a63d0c761fbb02089850605360f389477d8 (patch) | |
| tree | a509b1daf6e41f7768eaf49235c573690f12ef9b /fs/btrfs/transaction.h | |
| parent | 333db94cdde9e6dfdedab9290d04d812f83e0922 (diff) | |
| download | lwn-89ce8a63d0c761fbb02089850605360f389477d8.tar.gz lwn-89ce8a63d0c761fbb02089850605360f389477d8.zip | |
Add btrfs_end_transaction_throttle to force writers to wait for pending commits
The existing throttle mechanism was often not sufficient to prevent
new writers from coming in and making a given transaction run forever.
This adds an explicit wait at the end of most operations so they will
allow the current transaction to close.
There is no wait inside file_write, inode updates, or cow filling, all which
have different deadlock possibilities.
This is a temporary measure until better asynchronous commit support is
added. This code leads to stalls as it waits for data=ordered
writeback, and it really needs to be fixed.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/transaction.h')
| -rw-r--r-- | fs/btrfs/transaction.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h index c3172ddb3321..52559b51b181 100644 --- a/fs/btrfs/transaction.h +++ b/fs/btrfs/transaction.h @@ -101,4 +101,6 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, struct btrfs_root *root); int btrfs_write_ordered_inodes(struct btrfs_trans_handle *trans, struct btrfs_root *root); +int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans, + struct btrfs_root *root); #endif |