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[2003:d8:2f1a:f500:4346:f17c:2bde:808c]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-454cd49cee7sm22397085e9.29.2025.07.08.06.41.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 08 Jul 2025 06:41:02 -0700 (PDT) Message-ID: <59a5d9ed-36db-4799-849b-7bbd885465d1@redhat.com> Date: Tue, 8 Jul 2025 15:41:00 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC 02/11] mm/migrate_device: flags for selecting device private THP pages To: Balbir Singh , linux-mm@kvack.org, akpm@linux-foundation.org Cc: dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org, Karol Herbst , Lyude Paul , Danilo Krummrich , David Airlie , Simona Vetter , =?UTF-8?B?SsOpcsO0bWUgR2xpc3Nl?= , Shuah Khan , Barry Song , Baolin Wang , Ryan Roberts , Matthew Wilcox , Peter Xu , Zi Yan , Kefeng Wang , Jane Chu , Alistair Popple , Donet Tom References: <20250306044239.3874247-1-balbirs@nvidia.com> <20250306044239.3874247-3-balbirs@nvidia.com> From: David Hildenbrand Autocrypt: addr=david@redhat.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Stat-Signature: p4o1cnstnbfw1ai7cm7zrhaf86e4p1d6 X-Rspamd-Queue-Id: 8A85B40009 X-Rspamd-Server: rspam11 X-Rspam-User: X-HE-Tag: 1751982066-718491 X-HE-Meta: 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 XNp0z1lC x0a/NKczubQjYXX/asl1XglJmdUojGpruWDRfbifyzCxH9VwxLi6mGkPJtTqGrG2ktHLd23WU1WOZvEs4IBJuCenDjS03gf6KRyM6GtlsjZnCPZGTnM1Uxt6CiBG1BFvLPCTpV/TrkNFdWIEkb2o9TvxMN/GMEju0RhQj 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 06.03.25 05:42, Balbir Singh wrote: > Add flags to mark zone device migration pages. > > MIGRATE_VMA_SELECT_COMPOUND will be used to select THP pages during > migrate_vma_setup() and MIGRATE_PFN_COMPOUND will make migrating > device pages as compound pages during device pfn migration. > > Signed-off-by: Balbir Singh > --- > include/linux/migrate.h | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/include/linux/migrate.h b/include/linux/migrate.h > index 61899ec7a9a3..b5e4f51e64c7 100644 > --- a/include/linux/migrate.h > +++ b/include/linux/migrate.h > @@ -167,6 +167,7 @@ static inline int migrate_misplaced_folio(struct folio *folio, int node) > #define MIGRATE_PFN_VALID (1UL << 0) > #define MIGRATE_PFN_MIGRATE (1UL << 1) > #define MIGRATE_PFN_WRITE (1UL << 3) > +#define MIGRATE_PFN_COMPOUND (1UL << 4) > #define MIGRATE_PFN_SHIFT 6 > > static inline struct page *migrate_pfn_to_page(unsigned long mpfn) > @@ -185,6 +186,7 @@ enum migrate_vma_direction { > MIGRATE_VMA_SELECT_SYSTEM = 1 << 0, > MIGRATE_VMA_SELECT_DEVICE_PRIVATE = 1 << 1, > MIGRATE_VMA_SELECT_DEVICE_COHERENT = 1 << 2, > + MIGRATE_VMA_SELECT_COMPOUND = 1 << 3, > }; > > struct migrate_vma { Squash that into the patch where it is actually used. -- Cheers, David / dhildenb