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Btrfs: check to see if the inode is in the log before fsyncing

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We have this check down in the actual logging code, but this is after we
start a transaction and all that good stuff.  So move the helper
inode_in_log() out so we can call it in fsync() and avoid starting a
transaction altogether and just exit if we've already fsync()'ed this file
recently.  You would notice this issue if you fsync()'ed a file over and
over again until the transaction committed.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
This commit is contained in:
Josef Bacik
2012-05-29 16:57:49 -04:00
parent 018642a1f1
commit 22ee6985de
3 changed files with 16 additions and 17 deletions
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3
fs/btrfs/file.c
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@@ -1552,7 +1552,8 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
* syncing
*/
smp_mb();
if (BTRFS_I(inode)->last_trans <=
if (btrfs_inode_in_log(inode, root->fs_info->generation) ||
BTRFS_I(inode)->last_trans <=
root->fs_info->last_trans_committed) {
BTRFS_I(inode)->last_trans = 0;
mutex_unlock(&inode->i_mutex);