Ultrasparc 2 SMP 2.4.26-pre4 fails

Ultrasparc 2 SMP 2.4.26-pre4 fails

[C.Newport]

I am having problems getting 2.4.x to work in SMP mode on my 
Ultra2 Creator. 2x 300MHz, 384Mb

The story so far :- 
System has 2.2.20-pre2 SMP installed, this works fine.
Built 2.4.25 using default config, boot fails locking up solid at
 Remapping the kernel... done.
 Booting Linux...
 Starting CPU 1...

At this point Stop-A does not work, so the lockup is really tight.
Reboot with maxcpus=1 works fine.

Patch to 2.4.26-pre4, rebuild, same symptoms.
gcc --version
 2.95.3

Am I wasting my time trying to get 2.4.x SMP working ?, checking
back in the list, others seem to have had similar problems but the
fixes seem to refer to 2.6 only.

I could do more testing but this would need the latest SILO, the
above kernels are stripped because the default config is too big.

Thanks,
Chris Newport
 

Re: Ultrasparc 2 SMP 2.4.26-pre4 fails

[David S. Miller]

On Thu, 18 Mar 2004 01:00:54 +0000
"C.Newport" <crn@netunix.com> wrote:

> Am I wasting my time trying to get 2.4.x SMP working ?, checking
> back in the list, others seem to have had similar problems but the
> fixes seem to refer to 2.6 only.

Nope, it should work like a charm.  Boot with "-p" and see if
anymore diags get spit out.

Re: Ultrasparc 2 SMP 2.4.26-pre4 fails

[C.Newport]

On Thursday 18 March 2004 2:30 am, David S. Miller wrote:
> On Thu, 18 Mar 2004 01:00:54 +0000
>
> "C.Newport" <crn@netunix.com> wrote:
> > Am I wasting my time trying to get 2.4.x SMP working ?, checking
> > back in the list, others seem to have had similar problems but the
> > fixes seem to refer to 2.6 only.
>
> Nope, it should work like a charm.  Boot with "-p" and see if
> anymore diags get spit out.

PROMLIB: Sun IEEE Boot Prom 3.11.2 1997/12/05 10:25
<4>Linux version 2.4.26-pre4 (root@ultra2) (gcc version egcs-2.92.11 19980921 
(gcc2 ss-980609 experimental)) #2 SMP Wed Mar 17 22:46:47 GMT 2004
<ARCH>: SUN4U
ARCH: SUN4U
Ethernet address: 08:00:20:9b:f1:8d
Remapping the kernel... done.
On node 0 totalpages: 48539
zone(0) 163745 pages.
zone(1) 0 pages.
zone(2) 0 pages.
Booting Linux...
Found CPU 0 (nodeð0661ac,mid=0)
Found CPU 1 (nodeð066518,mid=1)
Found 2 CPU prom device tree node(s).
Kernel command line: root=/dev/sda1 ro -p
Console: colour dummy device 80x25
Calibrating delay loop... 591.46 BogoMIPS
Memory: 372872k available (2280k kernel code, 576k data,168k init) 
[fffff80000000000,0000000004ff42000]
Dentry cache hash table entries: 65536 (order: 7, 1048576 bytes)
Inode cache hash table entries: 32768 (order: 6, 524288 bytes)
Mount cache hash table entries: 512 (order: 0, 8192 bytes)
Buffer cache hash table entries: 16384 (order: 4, 131072 bytes)
Page-cache hash table entries: 65536 (order: 6, 524288 bytes)
Posix conformance testing by UNIFIX 
Entering UltraSMPenguin mode...
Starting CPU 1... 

Should I try upgrading to the same compiler, libs, and toolset as you
or rip some stuff out of the config so that I do not need to strip the
kernel ?.

Re: Ultrasparc 2 SMP 2.4.26-pre4 fails

[C.Newport]

On Thursday 18 March 2004 10:51 am, C.Newport wrote:
> On Thursday 18 March 2004 2:30 am, David S. Miller wrote:
> > On Thu, 18 Mar 2004 01:00:54 +0000
> >
> > "C.Newport" <crn@netunix.com> wrote:
> > > Am I wasting my time trying to get 2.4.x SMP working ?, checking
> > > back in the list, others seem to have had similar problems but the
> > > fixes seem to refer to 2.6 only.
> >
> > Nope, it should work like a charm.  Boot with "-p" and see if
> > anymore diags get spit out.

Progress :-
I have stripped out all non-esentials from the default config and
SMP now works. Looks like I have a nice time-consuming job of
putting things back until it breaks again.