Btrfs: Throttle file_write when data=ordered is flushing the inode
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index 3ee51e1..b474902 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -269,3 +269,16 @@
return ret;
}
+int btrfs_ordered_throttle(struct btrfs_root *root, struct inode *inode)
+{
+ struct btrfs_transaction *cur = root->fs_info->running_transaction;
+ while(cur == root->fs_info->running_transaction &&
+ atomic_read(&BTRFS_I(inode)->ordered_writeback)) {
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18)
+ congestion_wait(WRITE, HZ/20);
+#else
+ blk_congestion_wait(WRITE, HZ/20);
+#endif
+ }
+ return 0;
+}