Commit f019f426 authored by Josef Bacik's avatar Josef Bacik Committed by Chris Mason

Btrfs: fix bitmap size tracking

When we first go to add free space, we allocate a new info and set the offset
and bytes to the space we are adding.  This is fine, except we actually set the
size of a bitmap as we set the bits in it, so if we add space to a bitmap, we'd
end up counting the same space twice.  This isn't a huge deal, it just makes
the allocator behave weirdly since it will think that a bitmap entry has more
space than it ends up actually having.  I used a BUG_ON() to catch when this
problem happened, and with this patch I no longer get the BUG_ON().
Signed-off-by: default avatarJosef Bacik <jbacik@redhat.com>
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 0a24325e
...@@ -403,6 +403,7 @@ static void add_new_bitmap(struct btrfs_block_group_cache *block_group, ...@@ -403,6 +403,7 @@ static void add_new_bitmap(struct btrfs_block_group_cache *block_group,
BUG_ON(block_group->total_bitmaps >= max_bitmaps); BUG_ON(block_group->total_bitmaps >= max_bitmaps);
info->offset = offset_to_bitmap(block_group, offset); info->offset = offset_to_bitmap(block_group, offset);
info->bytes = 0;
link_free_space(block_group, info); link_free_space(block_group, info);
block_group->total_bitmaps++; block_group->total_bitmaps++;
......
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