I'm entering this in response to a slashdot post; someone else mentioned
experiencing the same problem, and bero replied that nobody had
submitted it to bugzilla.redhat.com yet.

I am using a 32 MB Geforce DDR with XFree86-4.0.1-0.43,
/usr/X11R6/lib/modules/drivers/nv_drv.o as provided in that RPM,
glibc-2.1.92-5, and kernel 2.4.0-test7 (hand compiled from kernel.org
sources).

XFree has the dbe, extmod, type1, freetype, and glx modules loaded, and is
running at 1152x864x24bpp resolution/color depth.

I am running 3 tty VTs, Helix Gnome with sawfish configured to use one 3x2
screen sized workspace, netscape-communicator-4.75-0.6.2 (with 3 open
windows, and open long enough to have leaked up to 40-50MB RAM usage
itself), and have 6 gnome-terminal windows open.  My memory usage is as
follows:

From ps auwwx:

USER       PID %CPU %MEM   VSZ  RSS TTY      STAT START   TIME COMMAND
root       765 18.8 23.2 86372 29520 ?       R    Sep19 750:25 /etc/X11/X
-auth /var/gdm/:0.Xauth :0

From top:

  PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME COMMAND
  765 root      13   0 81740  77M  1432 S     0.4 62.2 750:25 X

From free:
             total       used       free     shared    buffers     cached
Mem:        127180     122800       4380          0        588      24052
-/+ buffers/cache:      98160      29020
Swap:       128988       9576     119412

If I run a second X server with no clients, "X :1", I see the following
usage on it:

From "ps auwwx":
USER       PID %CPU %MEM   VSZ  RSS TTY      STAT START   TIME COMMAND
root     10147  0.8  5.1 57548 6504 ?        S    16:40   0:00 /etc/X11/X
:1

From top:
  PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME COMMAND
10147 root       9   0 56092  54M  1544 S     0.0 44.1   0:00 X


I am somewhat confused about how the RSS (resident set size?) can be
reported so differently between top and ps, but those aren't typos.