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Mon, 13 Sep 2021 16:16:19 +0000 From: Alex Sierra To: akpm@linux-foundation.org, Felix.Kuehling@amd.com, linux-mm@kvack.org, rcampbell@nvidia.com, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, hch@lst.de, jgg@nvidia.com, jglisse@redhat.com Subject: [PATCH v2 04/12] mm: add device public vma selection for memory migration Date: Mon, 13 Sep 2021 11:15:56 -0500 Message-Id: <20210913161604.31981-5-alex.sierra@amd.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210913161604.31981-1-alex.sierra@amd.com> References: <20210913161604.31981-1-alex.sierra@amd.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: SA9P223CA0015.NAMP223.PROD.OUTLOOK.COM (2603:10b6:806:26::20) To SA0PR12MB4430.namprd12.prod.outlook.com (2603:10b6:806:70::20) MIME-Version: 1.0 Received: from alex-MS-7B09.amd.com (165.204.78.1) by SA9P223CA0015.NAMP223.PROD.OUTLOOK.COM (2603:10b6:806:26::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4500.14 via Frontend Transport; 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Device public type memory is cache coherent from device and CPU point of view. Signed-off-by: Alex Sierra --- v2: condition added when migrations from device public pages. --- include/linux/migrate.h | 1 + mm/migrate.c | 9 +++++++-- 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/include/linux/migrate.h b/include/linux/migrate.h index 4bb4e519e3f5..2fe22596e02c 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -156,6 +156,7 @@ static inline unsigned long migrate_pfn(unsigned long pfn) enum migrate_vma_direction { MIGRATE_VMA_SELECT_SYSTEM = 1 << 0, MIGRATE_VMA_SELECT_DEVICE_PRIVATE = 1 << 1, + MIGRATE_VMA_SELECT_DEVICE_PUBLIC = 1 << 2, }; struct migrate_vma { diff --git a/mm/migrate.c b/mm/migrate.c index 7392648966d2..036baf24b58b 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2406,8 +2406,6 @@ static int migrate_vma_collect_pmd(pmd_t *pmdp, if (is_write_device_private_entry(entry)) mpfn |= MIGRATE_PFN_WRITE; } else { - if (!(migrate->flags & MIGRATE_VMA_SELECT_SYSTEM)) - goto next; pfn = pte_pfn(pte); if (is_zero_pfn(pfn)) { mpfn = MIGRATE_PFN_MIGRATE; @@ -2415,6 +2413,13 @@ static int migrate_vma_collect_pmd(pmd_t *pmdp, goto next; } page = vm_normal_page(migrate->vma, addr, pte); + if (!is_zone_device_page(page) && + !(migrate->flags & MIGRATE_VMA_SELECT_SYSTEM)) + goto next; + if (is_zone_device_page(page) && + (!(migrate->flags & MIGRATE_VMA_SELECT_DEVICE_PUBLIC) || + page->pgmap->owner != migrate->pgmap_owner)) + goto next; mpfn = migrate_pfn(pfn) | MIGRATE_PFN_MIGRATE; mpfn |= pte_write(pte) ? MIGRATE_PFN_WRITE : 0; } -- 2.32.0