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btrfs: fix free space calculation in dump_space_info() 

In btrfs, btrfs_space_info's bytes_may_use is treated as fs used
space, as what we do in reserve_metadata_bytes() or
btrfs_alloc_data_chunk_ondemand(), so in dump_space_info(), when
calculating free space, we should also subtract btrfs_space_info's
bytes_may_use.

Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Wang Xiaoguang 2016-07-11 19:30:04 +08:00 committed by David Sterba
parent 751bebbe0a
commit 39581a3a1a
1 changed files with 2 additions and 2 deletions
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4
fs/btrfs/extent-tree.c
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@ -7906,8 +7906,8 @@ static void dump_space_info(struct btrfs_space_info *info, u64 bytes,
printk(KERN_INFO "BTRFS: space_info %llu has %llu free, is %sfull\n",
info->flags,
info->total_bytes - info->bytes_used - info->bytes_pinned -
info->bytes_reserved - info->bytes_readonly,
(info->full) ? "" : "not ");
info->bytes_reserved - info->bytes_readonly -
info->bytes_may_use, (info->full) ? "" : "not ");
printk(KERN_INFO "BTRFS: space_info total=%llu, used=%llu, pinned=%llu, "
"reserved=%llu, may_use=%llu, readonly=%llu\n",
info->total_bytes, info->bytes_used, info->bytes_pinned,