Re: [PATCH 1/3] kexec: Prevent removal of memory in use by a loaded kexec image

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Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> writes:

> On Mon, 13 Apr 2020 08:15:23 -0500 ebiederm@xxxxxxxxxxxx (Eric W. Biederman) wrote:
>
>> > For 3), people can still use kexec_load and develop/fix for it, if no
>> > kexec_file_load supported. But 32-bit arm should be a different one,
>> > more like i386, we will leave it as is, and fix anything which could
>> > break it. But people really expects to improve or add feature to it? E.g
>> > in this patchset, the mem hotplug issue James raised, I assume James is
>> > focusing on arm64, x86_64, but not 32-bit arm. As DavidH commented in
>> > another reply, people even don't agree to continue supporting memory
>> > hotplug on 32-bit system. We ever took effort to fix a memory hotplug
>> > bug on i386 with a patch, but people would rather set it as BROKEN.
>> 
>> For memory hotplug just reload.  Userspace already gets good events.
>> 
>> We should not expect anything except a panic kernel to be loaded over a
>> memory hotplug event. The kexec on panic code should actually be loaded
>> in a location that we don't reliquish if asked for it.
>
> Is that a nack for James's patchset?

I have just read the end of the thread and I have the sense that the
patchset had already been rejected.  I will see if I can go back and
read the beginning.

I was mostly reacting to the idea that you could stop maintaining an
interface that people are actively using because there is a newer
interface.

Eric


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