ARM kexec SMP problem using exynos4210

McClintock Matthew-B29882 B29882 at
Wed Jan 11 12:20:43 EST 2012

On Wed, Jan 11, 2012 at 5:03 AM, Will Deacon <will.deacon at> wrote:
> On Wed, Jan 11, 2012 at 10:23:18AM +0000, Joonyoung Shim wrote:
>> One more question, generally boot cpu is first cpu(cpu0). If current
>> cpu is secondary cpu(cpu1), smp_send_stop of machine_shutdown will stop
>> first cpu and next kernel will try to boot on secondary cpu. Is it
>> possible?
> I added the cpu_logical_map stuff for this, so the kernel can handle it.
> That said, your platform may have restrictions about the boot CPU so if it
> doesn't work, you'll need to taskset the kexec command to CPU 0.

Would this negatively effect kdump though where you might not be able
to switch back to cpu0? I think It's best to be able to boot on any


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