diff options
| author | Christoph Hellwig <hch@lst.de> | 2022-02-16 07:31:37 +0300 |
|---|---|---|
| committer | Matthew Wilcox (Oracle) <willy@infradead.org> | 2022-03-03 20:47:33 +0300 |
| commit | 1776c0d102482d4aeccd56e404285bc47a481be8 (patch) | |
| tree | b39590a978d033b93811018e58d1b535c5574438 | |
| parent | f9f38f78c5d5eef3717b48d84263b4b46ee0110a (diff) | |
mm: refactor the ZONE_DEVICE handling in migrate_vma_insert_page
Make the flow a little more clear and prepare for adding a new
ZONE_DEVICE memory type.
Link: https://lkml.kernel.org/r/20220210072828.2930359-12-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alistair Popple <apopple@nvidia.com>
Tested-by: "Sierra Guiza, Alejandro (Alex)" <alex.sierra@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Chaitanya Kulkarni <kch@nvidia.com>
Cc: Christian Knig <christian.koenig@amd.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Felix Kuehling <Felix.Kuehling@amd.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Karol Herbst <kherbst@redhat.com>
Cc: Logan Gunthorpe <logang@deltatee.com>
Cc: Lyude Paul <lyude@redhat.com>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: "Pan, Xinhui" <Xinhui.Pan@amd.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
| -rw-r--r-- | mm/migrate.c | 31 |
1 files changed, 15 insertions, 16 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index af0534de618a..4246dca6c469 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2674,26 +2674,25 @@ static void migrate_vma_insert_page(struct migrate_vma *migrate, */ __SetPageUptodate(page); - if (is_zone_device_page(page)) { - if (is_device_private_page(page)) { - swp_entry_t swp_entry; + if (is_device_private_page(page)) { + swp_entry_t swp_entry; - if (vma->vm_flags & VM_WRITE) - swp_entry = make_writable_device_private_entry( - page_to_pfn(page)); - else - swp_entry = make_readable_device_private_entry( - page_to_pfn(page)); - entry = swp_entry_to_pte(swp_entry); - } else { - /* - * For now we only support migrating to un-addressable - * device memory. - */ + if (vma->vm_flags & VM_WRITE) + swp_entry = make_writable_device_private_entry( + page_to_pfn(page)); + else + swp_entry = make_readable_device_private_entry( + page_to_pfn(page)); + entry = swp_entry_to_pte(swp_entry); + } else { + /* + * For now we only support migrating to un-addressable device + * memory. + */ + if (is_zone_device_page(page)) { pr_warn_once("Unsupported ZONE_DEVICE page type.\n"); goto abort; } - } else { entry = mk_pte(page, vma->vm_page_prot); if (vma->vm_flags & VM_WRITE) entry = pte_mkwrite(pte_mkdirty(entry)); |