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From: Mikael Starvik <mikael.starvik@axis.com>
To: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Date: Mon, 13 Feb 2012 09:49:22 +0100
Subject: SMP MIPS and Linux 3.2
Thread-Topic: SMP MIPS and Linux 3.2
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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 bytes
[    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
/Mikael