linux-kernel - Re: [PATCH] liveupdate: kho: Enable KHO by default

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Message-ID: <aRhK6dBs6ZwEz9Md@kernel.org>
Date: Sat, 15 Nov 2025 11:42:01 +0200
From: Mike Rapoport <rppt@...nel.org>
To: Pasha Tatashin <pasha.tatashin@...een.com>
Cc: akpm@...ux-foundation.org, graf@...zon.com, pratyush@...nel.org,
	linux-kernel@...r.kernel.org, kexec@...ts.infradead.org,
	linux-mm@...ck.org
Subject: Re: [PATCH] liveupdate: kho: Enable KHO by default

On Fri, Nov 14, 2025 at 09:13:01AM -0500, Pasha Tatashin wrote:
> On Fri, Nov 14, 2025 at 2:30 AM Mike Rapoport <rppt@...nel.org> wrote:
> >
> > On Mon, Nov 10, 2025 at 01:07:15PM -0500, Pasha Tatashin wrote:
> > > Upcoming LUO requires KHO for its operations, the requirement to place
> > > both KHO=on and liveupdate=on becomes redundant. Set KHO to be enabled
> > > by default.
> >
> > I though more about this and it seems too much of a change. kho=1 enables
> > scratch areas and that significantly changes how free pages are distributed
> > in the free lists.
> >
> > Let's go with a Kconfig option we discussed of-list:
> > (this is on top of the current mmotm/mm-nonmm-unstable)
> 
> I will include this into the KHO simplification series

Please add Alex's Reviewed-by as well.

-- 
Sincerely yours,
Mike.