[$] Rethinking fsinfo()

The proposed fsinfo() system call, which returns extendedinformation about mounted filesystems, was first covered here just over one year ago. The formof fsinfo() has not changed much in that year, but the debate overmerging it continues. To some, fsinfo() is needed to efficientlyobtain information about filesystems; to others, it is an unnecessary andover-engineered mechanism. Changes will probably be necessary if thisfeature is ever to make it into the mainline kernel.