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b=JVE7FFfcnStH8/zqhoWCvqwopCxelotqfG4sYk/BiaxyZy1UEJbCr94sYXbNJHav4 Y3x4oN5eUZmh/GhUDL2b28zkgS2SIu05fnQ6STStSprGS+E1o2ohQ4DaRgT9bZ1eg2 oV2Fh+N/VH2TdbPJcobloEaC3F6G4cMn1Feev7xyebN+UmwsMLWWj/Up8lenQsdTFn twFkMiK5B9gfWBoXnKKn8hQcW0k4WwcoqJZV14JAxtpvPKCQKm9iMdmwObnqo5HSV0 991oTRVul8vfpew05xw2F3A5UQbwRWcUrl4F4alp0931iG8fkbF5OnAuro2wJNSzIB Q9J0OECjcwi+g== Date: Sat, 15 Nov 2025 11:42:01 +0200 From: Mike Rapoport To: Pasha Tatashin Cc: akpm@linux-foundation.org, graf@amazon.com, pratyush@kernel.org, linux-kernel@vger.kernel.org, kexec@lists.infradead.org, linux-mm@kvack.org Subject: Re: [PATCH] liveupdate: kho: Enable KHO by default Message-ID: References: <20251110180715.602807-1-pasha.tatashin@soleen.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Rspamd-Server: rspam12 X-Rspam-User: X-Rspamd-Queue-Id: 352E8A0004 X-Stat-Signature: t3c188mcwccbo9fjt4yd7mzxprzb87zn X-HE-Tag: 1763199728-225069 X-HE-Meta: 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 Kmej7FFV Kqk+lRJ6LzwvOihVqhK+CA7J8o9mrerY1un3fgXNb8OfBP+b13E+FC6q1KoNeBFxd/k4yObK5X+13eJqbPwQPioi0iH8H/OggEliZTeW7kxz45JMTyTrUp3RLp1R+euuulGOyPUgRuC5nomnNdF1CRP5tN4mY5Rp4PKWcSR6Jw2GrUYe1P8RWViUHfRUdEGjjsuklBjr00kLrynFjwHRNqgMmeWT9pLgp1ESIda+O6AtvY2jmuTlxfSPeyw1DXNfUc2w9BXJmxKxXZSseIJjAJs1x+z9yNVoV/w4foqEBwokdDiw= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Nov 14, 2025 at 09:13:01AM -0500, Pasha Tatashin wrote: > On Fri, Nov 14, 2025 at 2:30 AM Mike Rapoport 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.