1 |
On Sat, Jun 4, 2011 at 6:23 PM, Magnus Lindholm <linmag7@×××××.com> wrote: |
2 |
> Hi, |
3 |
> |
4 |
> I have a UP2000+ system with dual 21264 @ 667MHz/4MB cache and 2GB RAM. The |
5 |
> system runs fine with RedHat 7.2 Linux (downloaded from hp website) with an |
6 |
> 2.4 SMP kernel. However, running Gentoo with an SMP kernel will eventually |
7 |
> make the system freeze (i.e make -j2 when building a new kernel only lasts |
8 |
> for a 30 seconds or so). I've also tried NetBSD-5.1, FreeBSD-6.4, and a few |
9 |
> other Linux distros with the 2.6 kernel (make -j2 makes the system freeze). |
10 |
> It seems like Linux kernel 2.4 is the only OS that works with SMP on my |
11 |
> system. Has anyone else experienced something similar with an UP2000+ Alpha |
12 |
> system? First I suspected faulty hardware, but RedHat 7.2 seems to work just |
13 |
> fine so... |
14 |
> |
15 |
> I heard somewhere that Linux going from 2.4 to 2.6 made some significant |
16 |
> re-structuring of the SMP code that broke SMP support on some systems? |
17 |
> |
18 |
> The system has a Matrox Millenium and a 3Com 3c509B Ethernet card and a SCSI |
19 |
> disk hooked up to the on-board SCSI. I've tried unplugging the NIC and a |
20 |
> using a DEC PowerStorm 3D30 in stead of the Matrox Millenium, different CPU |
21 |
> modules and different RAM modules. All with the same results. There are no |
22 |
> error messages to be seen anywhere when the system freezes up. |
23 |
> |
24 |
> |
25 |
> Regards |
26 |
> |
27 |
> Magnus |
28 |
|
29 |
It's been my experience that UP2000s are quite fragile. Not entirely |
30 |
sure if it's the Cchips/Dchips on the board or the CPUs themselves. |
31 |
Maybe the SMP scheduler in 2.4 isn't good enough to sufficiently load |
32 |
both CPUs or something. Anyway, this doesn't seem to be an uncommon |
33 |
problem at all. |
34 |
|
35 |
If you're in Europe, I have a bunch of 833 MHz Slot B CPUs living with |
36 |
a friend in Finland. Perhaps you'd like to give a pair of these a try |
37 |
and if they work, buy them? |
38 |
|
39 |
Get on IRC, #alpha and #gentoo-alpha on Freenode and let's talk. |
40 |
|
41 |
Thanks, |
42 |
Matt |