[PATCH v23 0/9] arm64: add kdump support

[Geoff Levand]

Hi,

On Fri, 2016-07-29 at 19:26 +0300, Ruslan Bilovol wrote:

> Also for some reason in case of 'load and kexec the kernel' it
> takes 1-2 minutes to start booting after I do kexec -e, need to
> investigate it further.

You could try my patch ("purgatory: Change default sha256
optimization to -O2") in my master branch:

  https://git.kernel.org/cgit/linux/kernel/git/geoff/kexec-tools.git/log/

Other have said it helped.

-Geoff