| Message ID | 20171106024319.32584-2-wqu@suse.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index b35ce16b3df3..29a41e6c9e28 100644 --- a/fs/btrfs/compression.c +++ b/fs/btrfs/compression.c @@ -35,6 +35,7 @@ #include <linux/sched/mm.h> #include <linux/sort.h> #include <linux/log2.h> +#include <linux/zlib.h> #include "ctree.h" #include "disk-io.h" #include "transaction.h" @@ -1528,5 +1529,9 @@ unsigned int btrfs_compress_str2level(const char *str) if (str[4] == ':' && '1' <= str[5] && str[5] <= '9' && str[6] == 0) return str[5] - '0'; - return 0; + /* + * NOTE: Default compression level is not 0!! + * 0 means no compression at all + */ + return Z_DEFAULT_COMPRESSION; }
0 means no compression at all for zlib. Z_DEFAULT_COMPRESSION is the correct value, which is -1 and will be converted to 6 at runtime. Signed-off-by: Qu Wenruo <wqu@suse.com> --- fs/btrfs/compression.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)