GZip compression not supported

The gzip compression isn't supported. If you look at the zfs_main command, the 
option for 
enabling gzip compression is missing.

Further, the body of the gzip_compress function has been arbitrarily commented 
out (it's hard-
coded to return -1). 

http://github.com/alblue/mac-zfs/blob/master/usr/src/uts/common/fs/zfs/gzip.c

size_t
gzip_compress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)
{
#ifdef __APPLE__
    return(-1);
#else
...

Would be good to find out why this is the case, and see if we can fix it at all 
so that we can 
enable GZip compression for those that want/need it.

Original issue reported on code.google.com by alex.ble...@gmail.com on 20 Feb 2010 at 1:04

gmzang / maczfs

GZip compression not supported #21