On Tuesday, June 21, 2011 01:50:10 PM Li Zefan wrote:
> When the end of an extent exceeds the end of the specified range,
> the extent will be accidentally truncated.
>
> Signed-off-by: Li Zefan <lizf@xxxxxxxxxxxxxx>
> ---
> fs/btrfs/free-space-cache.c | 9 ++++++++-
> 1 files changed, 8 insertions(+), 1 deletions(-)
>
> diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
> index 292c0d9..185cf8e 100644
> --- a/fs/btrfs/free-space-cache.c
> +++ b/fs/btrfs/free-space-cache.c
> @@ -2509,8 +2509,15 @@ int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group,
> bytes = min(entry->bytes, end - start);
> if (bytes < minlen)
> goto next;
> +
> unlink_free_space(ctl, entry);
> - kmem_cache_free(btrfs_free_space_cachep, entry);
> + if (bytes < entry->bytes) {
> + entry->offset = entry->offset + bytes;
> + entry->bytes = entry->bytes - bytes;
> + link_free_space(ctl, entry);
yes, I forgot to link the rest extent to the free space cache.
Thanks for the fix!
> + } else {
> + kmem_cache_free(btrfs_free_space_cachep, entry);
> + }
> }
>
> spin_unlock(&ctl->tree_lock);
> -- 1.7.3.1
>
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