Re: RHEL 6/CentOS

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On 05/11/2011 05:46 AM, Johnny Hughes wrote:
On 05/10/2011 05:42 AM, Steve Clark wrote:
On 04/26/2011 08:24 AM, Steve Clark wrote:
Hello,

Anybody know the reason RedHat decided not to support the
VIA Eden Processor?

cat /proc/cpuinfo
processor       : 0
vendor_id       : CentaurHauls
cpu family      : 6
model           : 13
model name      : VIA Eden Processor  500MHz

I am testing, (using ayplus kernel) and get the following during bootup:
Linux version 2.6.32-71.24.1.el6.centos.ayplus.1.i686 (build@6beta32)
(gcc versi
on 4.4.4 20100630 (Red Hat 4.4.4-10) (GCC) ) #1 SMP Fri Apr 8 17:23:21
PDT 2011
KERNEL supported cpus:
  Intel GenuineIntel
  AMD AuthenticAMD
  NSC Geode by NSC
  Cyrix CyrixInstead
  Centaur CentaurHauls
  Transmeta GenuineTMx86
  Transmeta TransmetaCPU
  UMC UMC UMC UMC
UNSUPPORTED HARDWARE DEVICE: Centaur Processor
------------[ cut here ]------------
WARNING: at kernel/unsupported.c:13
mark_hardware_unsupported+0x37/0x40() (Not t
ainted)
Your hardware is unsupported.  Please do not report bugs, panics,
oopses, etc.,
on this hardware.
Modules linked in:
Pid: 0, comm: swapper Not tainted
2.6.32-71.24.1.el6.centos.ayplus.1.i686 #1
Call Trace:
 [<c0450201>] ? warn_slowpath_common+0x81/0xc0
 [<c0477e67>] ? mark_hardware_unsupported+0x37/0x40
 [<c0477e67>] ? mark_hardware_unsupported+0x37/0x40
 [<c0450293>] ? warn_slowpath_fmt_taint+0x33/0x40
 [<c0477e67>] ? mark_hardware_unsupported+0x37/0x40
 [<c08056eb>] ? early_init_centaur+0xd/0x2d
 [<c0a49835>] ? early_cpu_init+0x11a/0x13e
 [<c0a453b3>] ? setup_arch+0x38/0xb90
 [<c0450d3e>] ? vprintk+0x1ae/0x490
 [<c080ba2a>] ? printk+0x17/0x1d
 [<c0a5a4ee>] ? cgroup_init_subsys+0xcf/0xdb
 [<c0a406da>] ? start_kernel+0xca/0x3a4
---[ end trace a7919e7f17c0a725 ]---
Disabling lock debugging due to kernel taint



I traced it down to this code, which is not in the standard kernel.org
kernel-2.6.32.36:
from kernel-2.6.32.36
static void __cpuinit early_init_centaur(struct cpuinfo_x86 *c)
{
    switch (c->x86) {


from 2.6.32-71.24.1.el6.ayplus
arch/x86/kernel/cpu/centaur.c

static void __cpuinit early_init_centaur(struct cpuinfo_x86 *c)
{
        mark_hardware_unsupported("Centaur Processor");   <<<<<<<<<<
        switch (c->x86) {





Thanks,



FYI.
Replying to my own E-Mail after running
2.6.32-71.24.1.el6 from SL. I can report that I have
been having lockups (hangs) on three different via centaur processor boxes.
The hangs require power cycling the boxes.
If you take a look on google for "CentaurHauls i686" you will see that
this CPU/chipset SAYS it fully supports i686 but it really does not.
All of EL6 is i686 and not i586 (which CentaurHauls really fully supports).

I think you are going to have issues with this CPU and EL6 forever.
EL5.x should likely be used with this CPU ...

Hello,

does anyone have updates to this page for 6.0. I would like
to try to build a 2.6.32.xx kernel.org kernel and see if I still gets
hangs on my CentuarHauls boxes.

http://wiki.centos.org/HowTos/Custom_Kernel


--
Stephen Clark
NetWolves
Sr. Software Engineer III
Phone: 813-579-3200
Fax: 813-882-0209
Email: steve.clark@xxxxxxxxxxxxx
http://www.netwolves.com
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