> PANIC: early exception 0e rip 10:ffffffff810a029b error 0 cr2 21810

Is that the only info it gave you?  No stack backtrace?

Ok, now this is really strange.  I rebooted to check for additional output, which I don't recall; but it booted fine this time.  I am tending to lean toward a memory problem as the only thing I did different was swap the DIMM's to another slot and turn on ECC scrubbing and patrol.

Odd it failed like 5 times and the other kernel would boot up fine, but after switching memory around it booted up without a problem.

You can probably close this bug.  Thank you for the quick response.

Even more so... Andrew thank you for you involvement with Linux in general!

Hello.
I got the same error on one of our servers (PANIC: early exception 0e rip 10:ffffffff810a029b error 0 cr2 21810) and also did not get a stacktrace. Even after recompiling the kernel and rebooting it does not work. However I did not try to reboot after it hung the first time. Tested kernel was 2.6.30-r5. 

emerge --info is:
Portage 2.1.6.13 (default/linux/amd64/2008.0, gcc-4.1.2, glibc-2.9_p20081201-r2, 2.6.29-gentoo-r5 x86_64)
=================================================================                                        
System uname: Linux-2.6.29-gentoo-r5-x86_64-AMD_Opteron-tm-_Processor_248-with-glibc2.2.5                
Timestamp of tree: Fri, 21 Aug 2009 08:15:01 +0000                                                       
app-shells/bash:     3.2_p39                                                                             
dev-java/java-config: 2.1.8-r1                                                                           
dev-lang/python:     2.4.4-r13, 2.5.4-r3                                                                 
sys-apps/baselayout: 1.12.11.1                                                                           
sys-apps/sandbox:    1.6-r2                                                                              
sys-devel/autoconf:  2.63-r1
sys-devel/automake:  1.9.6-r2, 1.10.2
sys-devel/binutils:  2.18-r3
sys-devel/gcc-config: 1.4.1
sys-devel/libtool:   1.5.26
virtual/os-headers:  2.6.27-r2
ACCEPT_KEYWORDS="amd64"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -pipe -march=athlon64"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /var/lib/tomcat-6/webapps/ROOT"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/php/apache2-php5/ext-active/ /etc/php/cgi-php5/ext-active/ /etc/php/cli-php5/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/udev/rules.d"
CXXFLAGS="-O2 -pipe -march=athlon64"
DISTDIR="/usr/portage/distfiles"
FEATURES="distlocks fixpackages parallel-fetch protect-owned sandbox sfperms strict unmerge-orphans userfetch"
LANG="de_DE.utf8"
LDFLAGS="-Wl,-O1"
MAKEOPTS="-j5"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/usr/local/portage"
SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage"
USE="acl amd64 apache2 authdaemond bacula-console bash-completion berkdb bzip2 caps cli cracklib crypt cups dri fortran ftp gd gdbm gpm iconv ipv6 isdnlog java jpeg jpeg2k json logrotate logwatch maildir mmx mng mpeg mudflap multilib munin-apache mysql mysqli ncurses nls nptl nptlonly openmp pam pcre perl png pop pppd python qmail readline reflection session snmp spl sse sse2 ssl svg sysfs tcpd threads threadsafe truetype unicode ups userlocales vhosts vim vim-syntax xorg zlib" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias asis auth_basic auth_digest authn_alias authn_anon authn_dbd authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache dav deflate dir env expires filter headers include info log_config logio mime negotiation proxy proxy_connect proxy_ftp proxy_http rewrite setenvif speling status unique_id usertrack vhost_alias cern_meta charset_lite dav_fs dav_lock dbd disk_cache dumpio ext_filter file_cache ident imagemap mem_cache mime_magic proxy_ajp proxy_balancer substitute userdir version" ELIBC="glibc" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" USERLAND="GNU" VIDEO_CARDS="fbdev glint intel mach64 mga neomagic nv r128 radeon savage sis tdfx trident vesa vga via vmware voodoo"
Unset:  CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, FFLAGS, INSTALL_MASK, LC_ALL, LINGUAS, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS

If you need additional info me know. 

Testing new patches is not that easy because the server is a headless machine without remote management card and restricted physical access.

Thanks in advance
Phillip

Created attachment 22799 [details]
2.6.30-r5 kernel config

The kernel config was created using 'make oldconfig' from a 2.6.29-gentoo-r5-kernel