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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>
This commit is contained in:
Chris Mason 2009-07-24 16:30:55 -04:00
parent ebecd3d9d2
commit 283bb1979f
1 changed files with 2 additions and 1 deletions
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3
fs/btrfs/extent-tree.c
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@ -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);