[PATCH v33 00/14] add kdump support

[David Woodhouse]

On Wed, 2017-03-15 at 18:56 +0900, AKASHI Takahiro wrote:
> This patch series adds kdump support on arm64.
> 
> To load a crash-dump kernel to the systems, a series of patches to
> kexec-tools[1] are also needed. Please use the latest one, v6 [2].
> For your convinience, you can pick them up from:
>    https://git.linaro.org/people/takahiro.akashi/linux-aarch64.git arm64/kdump
>    https://git.linaro.org/people/takahiro.akashi/kexec-tools.git arm64/kdump
> 
> To examine vmcore (/proc/vmcore) on a crash-dump kernel, you can use
>   - crash utility (v7.1.8 or later) [3]
> 
> I tested this patchset on fast model and hikey.

Is this one going to be be my fault too?

[   38.947305] SMP: stopping secondary CPUs
[   38.951291] Starting crashdump kernel...
[   38.955207] ------------[ cut here ]------------
[   38.959818] WARNING: CPU: 0 PID: 312 at arch/arm64/kernel/machine_kexec.c:169 machine_kexec+0x220/0x298

That's the cpus_are_stuck_in_kernel() || num_online_cpus() one. Again,
v32 applied to a 4.9 kernel. With the stray __init removed this time ;)

Taking secondary CPUs down for a normal kexec does work via PSCI.

I'll see if I can enable enough hardware support to let me test a newer
kernel...
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