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Sat, 07 Feb 2026 09:21:00 -0800 (PST) MIME-Version: 1.0 References: <20260206021428.3386442-1-jasonmiu@google.com> <20260206021428.3386442-3-jasonmiu@google.com> In-Reply-To: <20260206021428.3386442-3-jasonmiu@google.com> From: Pasha Tatashin Date: Sat, 7 Feb 2026 12:20:24 -0500 X-Gm-Features: AZwV_QgzTl4mNxujoLDaf5mTXNHE3H1Ui7pyjHnr-IJSNXlSQjG622HK-ncLm8o Message-ID: Subject: Re: [PATCH v9 2/2] kho: Remove finalize state and clients To: Jason Miu Cc: Alexander Graf , Andrew Morton , Baoquan He , Changyuan Lyu , David Matlack , David Rientjes , Jason Gunthorpe , Mike Rapoport , Pratyush Yadav , kexec@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 9264B180006 X-Stat-Signature: uabreryxoxg3dut93iqskx93nt8hfzwp X-Rspam-User: X-HE-Tag: 1770484862-309358 X-HE-Meta: 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 ENIceU6d NkIGYXpcf5EDiU+z38bB6e4IVwOhdwWKDvjd2NWd9XeOhixOfT3Cyi0bBVpb+u9KGu9pGRG9OSYYWhVa+IEeOs3ccVtgjWnQS+rb3uiclD0Sj0cIjiITJHjLW5FcWU4Bz/2f6wNGyNfin02FGfsLxPGolRQBr/bMC/gSQ+ywqKLIECwCowbkF+dg3Rnm6Miaim1jmDa5z+5Zma4/qNlAHFewlSBD9KVP+MZCGgd3vWplktgMutGPM1ojIfNWQz9G6SMPANGZcOD6Kp+r8L60O1jdSXq8aEuGRtqgkadxbkLy4W4OuKPWyledKp0K0ipaQp8DHW96PRcsV7cwFdSS2d+h21AZ3q//dHreV5kZeQO52j0sAKhlEmsd/SQmEdr7+vXuU4Q6pGKAVL/b+ZldVdC4jgA== 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 Thu, Feb 5, 2026 at 9:14=E2=80=AFPM Jason Miu wrot= e: > > Eliminate the `kho_finalize()` function and its associated state from > the KHO subsystem. The transition to a radix tree for memory tracking > makes the explicit "finalize" state and its serialization step > obsolete. > > Remove the `kho_finalize()` and `kho_finalized()` APIs and their stub > implementations. Update KHO client code and the debugfs interface to > no longer call or depend on the `kho_finalize()` mechanism. > > Complete the move towards a stateless KHO, simplifying the overall > design by removing unnecessary state management. > > Signed-off-by: Jason Miu > --- > Documentation/admin-guide/mm/kho.rst | 53 +++++---------------- > Documentation/core-api/kho/index.rst | 12 ----- > kernel/liveupdate/kexec_handover.c | 21 +------- > kernel/liveupdate/kexec_handover_debugfs.c | 23 --------- > kernel/liveupdate/kexec_handover_internal.h | 3 -- > kernel/liveupdate/luo_core.c | 12 +---- > tools/testing/selftests/kho/init.c | 20 -------- > 7 files changed, 13 insertions(+), 131 deletions(-) Reviewed-by: Pasha Tatashin A comment in FLB patch would also need to be updated: 633 * Context: Called from liveupdate_reboot() just before kho_finalize(). 634 */ 635 void luo_flb_serialize(void) But, given that patch has not yet landed, it should be updated separately, as it is likely this work lands first. Pasha