On Mon, Aug 23, 2010 at 09:23:29AM +0800, Li Zefan wrote:
> When allocating extent entry from a cluster, we should update
> the free_space and free_extents fields of the block group.
>
> Signed-off-by: Li Zefan <l...@cn.fujitsu.com>
> ---
> fs/btrfs/free-space-cache.c | 17 ++++++++++++++---
> 1 files changed, 14 insertions(+), 3 deletions(-)
>
> diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
> index 631e14f..20f3141 100644
> --- a/fs/btrfs/free-space-cache.c
> +++ b/fs/btrfs/free-space-cache.c
> @@ -1090,15 +1090,26 @@ u64 btrfs_alloc_from_cluster(struct
> btrfs_block_group_cache *block_group,
> entry->offset += bytes;
> entry->bytes -= bytes;
>
> - if (entry->bytes == 0) {
> + if (entry->bytes == 0)
> rb_erase(&entry->offset_index, &cluster->root);
> - kfree(entry);
> - }
> break;
> }
> out:
> spin_unlock(&cluster->lock);
>
> + if (!ret)
> + return 0;
> +
> + spin_lock(&block_group->tree_lock);
> +
> + block_group->free_space -= bytes;
> + if (entry->bytes == 0) {
> + block_group->free_extents--;
> + kfree(entry);
> + }
> +
> + spin_unlock(&block_group->tree_lock);
> +
Move this part up so we don't drop the spinlock and then re-grab it. Thanks,
Josef
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