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SMP MIPS and Linux 3.2

To: "" <>
Subject: SMP MIPS and Linux 3.2
From: Mikael Starvik <>
Date: Mon, 20 Feb 2012 10:34:20 +0100
Accept-language: sv-SE
Acceptlanguage: sv-SE
Thread-index: AcznH9lfpXUbAgVmQ5aJnfIX4n0HcAIkubIw
Thread-topic: SMP MIPS and Linux 3.2
I'm running Linux 3.2 on a MIPS 34K with two VPEs (in MT_SMP configuration). It 
works fine in UP but with SMP it deadlocks during bootup (both CPUs gets idle). 
Typically like this:

[    0.090000] CPU revision is: 01019550 (MIPS 34Kc)
[    0.090000] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[    0.090000] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 
[    0.170000] Brought up 2 CPUs
<No more output>

I have tried to enable __ARCH_WANT_INTERRUPTS_ON_CTXSW but that didn't improve 
anything. Anyone else got this running or have any thoughts about what the 
problem may be?

Best Regards

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