From: Josef Bacik <josef@redhat.com>
Date: Mon, 29 Aug 2011 18:06:00 +0000 (-0400)
Subject: Btrfs: put the block group cache after we commit the super
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=300e4f8a56f263797568c95b71c949f9f02e4534;p=linux-beck.git

Btrfs: put the block group cache after we commit the super

In moving some enospc stuff around I noticed that when we unmount we are often
evicting the free space cache inodes before we do our last commit.  This isn't
bad, but it makes us constantly have to re-read the inodes back.  So instead
don't evict the cache until after we do our last commit, this will make things a
little less crappy and makes a future enospc change work properly.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
---

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 0b5643a68d57..4965a0179b31 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2543,8 +2543,6 @@ int close_ctree(struct btrfs_root *root)
 	/* clear out the rbtree of defraggable inodes */
 	btrfs_run_defrag_inodes(root->fs_info);
 
-	btrfs_put_block_group_cache(fs_info);
-
 	/*
 	 * Here come 2 situations when btrfs is broken to flip readonly:
 	 *
@@ -2570,6 +2568,8 @@ int close_ctree(struct btrfs_root *root)
 			printk(KERN_ERR "btrfs: commit super ret %d\n", ret);
 	}
 
+	btrfs_put_block_group_cache(fs_info);
+
 	kthread_stop(root->fs_info->transaction_kthread);
 	kthread_stop(root->fs_info->cleaner_kthread);
 
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 701ef5951e3f..1ea10731797a 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -105,7 +105,7 @@ struct inode *lookup_free_space_inode(struct btrfs_root *root,
 		block_group->disk_cache_state = BTRFS_DC_CLEAR;
 	}
 
-	if (!btrfs_fs_closing(root->fs_info)) {
+	if (!block_group->iref) {
 		block_group->inode = igrab(inode);
 		block_group->iref = 1;
 	}