On Wed, 2010-04-28 at 11:32 +0200, Peter Kjellstrom wrote: > On Tuesday 27 April 2010, cahit Eyigünlü wrote: > > I saw memtest support only 4gb ram but i have 8gb ; > > Huh? I've run memtest86 on 72G machines it uses slow PAE but gets the job > done. > > ... > > this is the error : > > > > BUG: unable to handle kernel paging request at ffffffffffffffe5 > > IP: [<ffffffff802a97ce>] fput+0x0/0x12 > > PGD 203067 PUD 204067 PMD 0 > > Oops: 0002 [#1] SMP > > last sysfs file: /sys/devices/system/cpu/cpu3/cache/index2/shared_cpu_map > > CPU 1 > > Modules linked in: ipt_REDIRECT xt_owner xt_conntrack iptable_mangle > ... > > Pid: 4243, comm: tar Not tainted 2.6.30 #1 ESPRIMO P5925 > > 2.6.30 is not quite a CentOS kernel (OT warning..) what are you running > exactly? --- A wild guess maybe Ubuntu or Debian. John