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[89.27.86.246]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-3a62f4f10b0sm3956141fa.8.2026.09.22.22.42.27 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 22 Sep 2026 22:42:28 -0700 (PDT) Message-ID: <8523ee92-04c1-4e52-a418-a3ab110bca38@redhat.com> Date: Wed, 23 Sep 2026 08:42:27 +0300 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v14 01/12] mm/Kconfig: changes for migrate on fault for device pages To: Balbir Singh , linux-mm@kvack.org Cc: dri-devel@lists.freedesktop.org, intel-xe@lists.freedesktop.org, linux-kernel@vger.kernel.org, David Hildenbrand , Jason Gunthorpe , Leon Romanovsky , Alistair Popple , Zi Yan , Matthew Brost , Andrew Morton , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko References: <20260922053421.4092027-1-mpenttil@redhat.com> <20260922053421.4092027-2-mpenttil@redhat.com> Content-Language: en-US From: =?UTF-8?Q?Mika_Penttil=C3=A4?= In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 9/23/26 01:27, Balbir Singh wrote: > On 9/22/26 3:34 PM, mpenttil@redhat.com wrote: >> From: Mika Penttilä >> >> HMM depends on MMU notifiers. With the unified HMM/migrate_device >> page table walk migrate_device needs HMM enabled. >> 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 Penttilä >> Acked-by: David Hildenbrand (Arm) >> --- >> mm/Kconfig | 1 + >> 1 file changed, 1 insertion(+) >> >> diff --git a/mm/Kconfig b/mm/Kconfig >> index 604c58199acb..b7a485beb9a7 100644 >> --- a/mm/Kconfig >> +++ b/mm/Kconfig >> @@ -687,6 +687,7 @@ config MIGRATION >> >> config DEVICE_MIGRATION >> def_bool MIGRATION && ZONE_DEVICE >> + select HMM_MIRROR >> >> config ARCH_ENABLE_HUGEPAGE_MIGRATION >> bool > > Acked-by: Balbir Singh Thanks Balbir!