Does anyone actually use KEXEC_JUMP?

[Eric W. Biederman]

David Woodhouse <dwmw2@xxxxxxxxxxxxx> writes:

> On Mon, 2024-12-16 at 14:39 +0100, Rafael J. Wysocki wrote:
>> From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
>> 
>> The KEXEC_JUMP flow is analogous to hibernation flows occurring
>> before
>> and after creating an image and before and after jumping from the
>> restore kernel to the image one, which is why it uses the same device
>> callbacks as those hibernation flows.
>> 
>> Add comments explaining that to the code in question and update an
>> existing comment in it which appears a bit out of context.
>> 
>> No functional changes.
>> 
>> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
>
> Thanks. I'll round that up into my kexec-debug tree, which Ingo has
> been taking into tip/x86/boot. Once I'm done fighting with
> objtool(qv).

I have no objection to getting kexec jump more in sync with the
rest of the power management code.

I do have a question though.  Does anyone actually use kexec jump?

It is fine if folks do, but I haven't actually heard of anyone using
it.  If folks aren't using it, it might make sense to just use the fact
that it is broken as a nudge to remove that option.

Eric