						-*- indented-text -*-
Documentation for ext2 compression (``e2compr'') can be found by
typing `info e2compr' at the shell prompt.  If you haven't installed
the e2compr documentation and utilities, then you can find the same
documentation at <http://e2compr.memalpha.cx/e2compr/manual/>.

(If you enable ext2 compression in the kernel, then it is recommended
that you visit <http://e2compr.memalpha.cx/e2compr/> and grab
some software from there.  You certainly require the e2compr version
of e2fsck.)


Release notes
=============

(These are sorted by version so that you don't have to reread things.
However, all of them are still important, or else I'd have removed
them.)


New with 0.4.3
--------------

If you get many many compression error messages in your kernel system
logs, then it is probably an error in the error checking rather than
in the de/compression algorithms.


New with 0.4.0
--------------

Starting with e2compr-0.4, you must reply `y' to CONFIG_EXPERIMENTAL
if you wish to be asked for ext2 compression.  (This is in readiness
for inclusion into the standard kernel.)

Don't rely on `chattr +X' (or the corresponding ioctl).  That
interface is broken.  It doesn't guarantee exclusivity for any kernel
after 2.1.42, so I've mostly removed support for it here.  (I still
keep it partially available for diagnostic purposes.)  A replacement
interface will probably arrive later.  If you wish to implement it
yourself, write to me <pjm@bofh.asn.au> and I'll send you my
plans for how to implement it.  (I don't mind how you implement it,
but I can at least inform you of the various race conditions etc. to
avoid.)
