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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 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> From: =?UTF-8?Q?Mika_Penttil=C3=A4?= In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: pl6GnJpD3vAza6KW7ccKmD1Q1sTrrHSm-svlIvDzkus_1790142150 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Stat-Signature: uaj7j5hwzta5b138si6nf3zystfmktjh X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: ECAA820006 X-HE-Tag: 1790142155-680247 X-HE-Meta: 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 Q7qw4Qe4 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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!