[PATCH v33 00/14] add kdump support

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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