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RE: SMP MIPS and Linux 3.2

To: "linux-mips@linux-mips.org" <linux-mips@linux-mips.org>
Subject: RE: SMP MIPS and Linux 3.2
From: Mikael Starvik <mikael.starvik@axis.com>
Date: Wed, 22 Feb 2012 11:57:42 +0100
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Thread-index: AcznH9lfpXUbAgVmQ5aJnfIX4n0HcAIkubIwAGd2VNA=
Thread-topic: SMP MIPS and Linux 3.2
Found it! There are no calls to scheduler_ipi() from the MIPS parts in vanilla 
3.2.

/Mikael

-----Original Message-----
From: Mikael Starvik 
Sent: den 20 februari 2012 10:34
To: 'linux-mips@linux-mips.org'
Subject: 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 
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

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