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[85.23.51.1]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-5a15602e692sm3263397e87.30.2026.03.15.23.24.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 15 Mar 2026 23:24:27 -0700 (PDT) From: mpenttil@redhat.com To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, =?UTF-8?q?Mika=20Penttil=C3=A4?= , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko Subject: [PATCH v6 1/6] mm:/Kconfig changes for migrate on fault for device pages Date: Mon, 16 Mar 2026 08:24:02 +0200 Message-ID: <20260316062407.3354636-2-mpenttil@redhat.com> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20260316062407.3354636-1-mpenttil@redhat.com> References: <20260316062407.3354636-1-mpenttil@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable From: Mika Penttil=C3=A4 With the unified HMM/migrate_device page table walk migrate_device needs HMM enabled and HMM needs MMU notifiers. Enable them explicitly to avoid breaking random configs. Cc: Andrew Morton Cc: David Hildenbrand Cc: Lorenzo Stoakes Cc: "Liam R. Howlett" Cc: Vlastimil Babka Cc: Mike Rapoport Cc: Suren Baghdasaryan Cc: Michal Hocko Signed-off-by: Mika Penttil=C3=A4 --- mm/Kconfig | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/Kconfig b/mm/Kconfig index ebd8ea353687..583d92bba2e8 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -647,6 +647,7 @@ config MIGRATION =20 config DEVICE_MIGRATION def_bool MIGRATION && ZONE_DEVICE + select HMM_MIRROR =20 config ARCH_ENABLE_HUGEPAGE_MIGRATION bool @@ -1222,6 +1223,7 @@ config ZONE_DEVICE config HMM_MIRROR bool depends on MMU + select MMU_NOTIFIER =20 config GET_FREE_REGION bool --=20 2.50.0