* Re: Linux 2.4 on 2001 G4
[not found] ` <20010409160621.12920@mailhost.mipsys.com>
@ 2001-04-10 8:29 ` Lars Brinkhoff
2001-04-10 8:54 ` Benjamin Herrenschmidt
0 siblings, 1 reply; 2+ messages in thread
From: Lars Brinkhoff @ 2001-04-10 8:29 UTC (permalink / raw)
To: Benjamin Herrenschmidt; +Cc: linuxppc-dev
Benjamin Herrenschmidt <benh@kernel.crashing.org> writes:
> >How is the SMP support for the Dual 533MHz G4 in your tree?
> It should work but some of my latest stuffs were not tested on SMP
It seems to hang in smp_core99_kick_cpu(), probably when the CPU takes
the exception. I inserted some debug messages around the call to
mdelay() like so:
if (ppc_md.progress) ppc_md.progress("!", 0);
mdelay(1);
if (ppc_md.progress) ppc_md.progress("smp_core99_kick_cpu: after mdelay", 0);
When booting, "!" is printed, but the other message is not.
Is there anything else I can do to diagnose the problem?
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: Linux 2.4 on 2001 G4
2001-04-10 8:29 ` Linux 2.4 on 2001 G4 Lars Brinkhoff
@ 2001-04-10 8:54 ` Benjamin Herrenschmidt
0 siblings, 0 replies; 2+ messages in thread
From: Benjamin Herrenschmidt @ 2001-04-10 8:54 UTC (permalink / raw)
To: Lars Brinkhoff, linuxppc-dev
>It seems to hang in smp_core99_kick_cpu(), probably when the CPU takes
>the exception. I inserted some debug messages around the call to
>mdelay() like so:
>
> if (ppc_md.progress) ppc_md.progress("!", 0);
> mdelay(1);
> if (ppc_md.progress) ppc_md.progress("smp_core99_kick_cpu: after
mdelay", 0);
>
>When booting, "!" is printed, but the other message is not.
>
>Is there anything else I can do to diagnose the problem?
I beleive it hangs in the second CPU entry point in head.S. My new CPU
identification & setup mecanism was not tested on SMP yet, so I beleive
it still has bugs. I'll look into this today or later this week.
Ben.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
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2001-04-10 8:29 ` Linux 2.4 on 2001 G4 Lars Brinkhoff
2001-04-10 8:54 ` Benjamin Herrenschmidt
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