Memtest86+ works fine on my amd64 system. I think that it could be made stable. Reproducible: Always Steps to Reproduce: 1. 2. 3. Portage 2.0.51.19 (default-linux/amd64/2005.0, gcc-3.4.3, glibc-2.3.4.20041102-r1, 2.6.11-gentoo-r7 x86_64) ================================================================= System uname: 2.6.11-gentoo-r7 x86_64 AMD Athlon(tm) 64 Processor 3800+ Gentoo Base System version 1.6.12 Python: dev-lang/python-2.3.5 [2.3.5 (#1, May 12 2005, 07:56:51)] ccache version 2.3 [enabled] dev-lang/python: 2.3.5 sys-apps/sandbox: [Not Present] sys-devel/autoconf: 2.13, 2.59-r6 sys-devel/automake: 1.5, 1.8.5-r3, 1.7.9-r1, 1.6.3, 1.4_p6, 1.9.5 sys-devel/binutils: 2.15.92.0.2-r10 sys-devel/libtool: 1.5.16 virtual/os-headers: 2.6.8.1-r4 ACCEPT_KEYWORDS="amd64" AUTOCLEAN="yes" CFLAGS="-march=k8 -O3 -pipe -fomit-frame-pointer" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.4/env /usr/kde/3.4/share/config /usr/kde/3.4/shutdown /usr/kde/3/share/config /usr/lib/X11/xkb /usr/share/config /usr/share/texmf/dvipdfm/config/ /usr/share/texmf/dvips/config/ /usr/share/texmf/tex/generic/config/ /usr/share/texmf/tex/platex/config/ /usr/share/texmf/xdvi/ /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-march=k8 -O3 -pipe -fomit-frame-pointer" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs autoconfig ccache distlocks sandbox sfperms strict userpriv usersandbox" GENTOO_MIRRORS="http://www.die.unipd.it/pub/Linux/distributions/gentoo-sources/ http://gentoo.inode.at/" LANG="it_IT.utf-8" LC_ALL="it_IT.utf-8" LINGUAS="it" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage" USE="amd64 X Xaw3d aalib acpi alsa arts avi bash-completion berkdb bitmap-fonts bzip2 bzlib caps cdparanoia cdr crypt cups curl dga dio doc dvd dvdread encode evo exif fam fbcon ffmpeg fftw flac font-server foomaticdb fortran ftp gcj gd ggi gif gphoto2 gpm gtk2 hal java javascript joystick jp2 jpeg kde kdeenablefinal libcaca libwww lm_sensors lzw lzw-tiff mad maildir matroska mbox mng motif mozilla mp3 mpeg ncurses nls nptl offensive ogg oggvorbis openal opengl oss pam perl png posix ppds python qt quicktime readline sasl scanner sdl sockets sox speex spell ssl svg symlink sysvipc tcltk tcpd tetex theora threads tiff truetype truetype-fonts type1-fonts unicode usb userlocales videos vorbis wmf xine xml2 xosd xpm xrandr xv xvid zlib linguas_it userland_GNU kernel_linux elibc_glibc" Unset: ASFLAGS, CBUILD, CTARGET, LDFLAGS, PORTDIR_OVERLAY
Tested and marked stable in line with maintainters arch in cvs, thanks.