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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/file.c | |
| parent | 333db94cdde9e6dfdedab9290d04d812f83e0922 (diff) | |
| download | linux-stable-89ce8a63d0c761fbb02089850605360f389477d8.tar.gz linux-stable-89ce8a63d0c761fbb02089850605360f389477d8.tar.bz2 linux-stable-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/file.c')
| -rw-r--r-- | fs/btrfs/file.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index b7f8f92daf8a..ece221cba90c 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -934,7 +934,6 @@ static ssize_t btrfs_file_write(struct file *file, const char __user *buf, balance_dirty_pages_ratelimited_nr(inode->i_mapping, num_pages); if (num_pages < (root->leafsize >> PAGE_CACHE_SHIFT) + 1) btrfs_btree_balance_dirty(root, 1); - btrfs_throttle(root); cond_resched(); } out: |