[PATCH 2/3] kdumpctl: Use kexec file based mode to unload kdump kernel

[Vivek Goyal]

On Fri, Sep 05, 2014 at 10:57:31AM +0800, Baoquan He wrote:
> On 09/05/14 at 10:45am, Dave Young wrote:
> > On 09/05/14 at 10:16am, Dave Young wrote:
> > > On 09/03/14 at 12:07pm, Vivek Goyal wrote:
> > > > Currently old kexec syscall denies unloading a kernel if secureboot is enabled.
> > > > I think this is not right behavior and should be changed. But for now, use
> > > > new syscall if secureboot is enabled and that allows unloading kernel.
> > > 
> > > We need to make sure the new syscall is in latest Fedora kernel, then we can add
> > > this patch in kexec-tools.
> > 
> > BTW, seems there's a new kconfig option for the syscall, it need a fedora kernel
> > patch if it's not default on.
> 
> Yeah, I was a little surprised when the OS said kexec_file_load is not
> implemented yet. Is there any concern about defaulting CONFIG_KEXEC_FILE
> now?

I think it is perfectly fine. This kexec-tools should be able to run
on kernels which have CONFIG_KEXEC_FILE=n and user space should display
correct error message.

Thanks
Vivek