Commit 283bb197 authored Jul 24, 2009 by Chris Mason

Btrfs: clear all space_info->full after removing a block group



Btrfs allocates individual extents from block groups, and each
block group has a specific type.  It may hold metadata, data
mirrored or striped etc.

When we balance space (btrfs-vol -b) or remove a drive (btrfs-vol -r)
we free block groups.  Once a block group is freed, the space it was
using on the device may be available for use by new block groups.

btrfs_remove_block_group was clearing the flag that said
'our devices are full, don't even try to allocate new block groups',
but it was only clearing that flag for a specific type of block group.

This commit clears the full flag for all of the types of block groups,
making it much more likely that we'll be able to balance space when
the drive is close to full.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

parent ebecd3d9

fs/btrfs/extent-tree.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -7486,7 +7486,8 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
		block_group->space_info->total_bytes -= block_group->key.offset;
		block_group->space_info->bytes_readonly -= block_group->key.offset;
		spin_unlock(&block_group->space_info->lock);
		block_group->space_info->full = 0;

		btrfs_clear_space_info_full(root->fs_info);

		btrfs_put_block_group(block_group);
		btrfs_put_block_group(block_group);

Admin message