The patch titled
Subject: mm: refactor the ZONE_DEVICE handling in migrate_vma_pages
has been added to the -mm tree. Its filename is
mm-refactor-the-zone_device-handling-in-migrate_vma_pages.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-refactor-the-zone_device-handling-in-migrate_vma_pages.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-refactor-the-zone_device-handling-in-migrate_vma_pages.patch
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------------------------------------------------------
From: Christoph Hellwig <hch@xxxxxx>
Subject: mm: refactor the ZONE_DEVICE handling in migrate_vma_pages
Make the flow a little more clear and prepare for adding a new
ZONE_DEVICE memory type.
Link: https://lkml.kernel.org/r/20220210072828.2930359-13-hch@xxxxxx
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Alistair Popple <apopple@xxxxxxxxxx>
Tested-by: "Sierra Guiza, Alejandro (Alex)" <alex.sierra@xxxxxxx>
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: Ben Skeggs <bskeggs@xxxxxxxxxx>
Cc: Chaitanya Kulkarni <kch@xxxxxxxxxx>
Cc: Christian Knig <christian.koenig@xxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Felix Kuehling <Felix.Kuehling@xxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxxxx>
Cc: Karol Herbst <kherbst@xxxxxxxxxx>
Cc: Logan Gunthorpe <logang@xxxxxxxxxxxx>
Cc: Lyude Paul <lyude@xxxxxxxxxx>
Cc: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Cc: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Cc: "Pan, Xinhui" <Xinhui.Pan@xxxxxxx>
Cc: Ralph Campbell <rcampbell@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/mm/migrate.c~mm-refactor-the-zone_device-handling-in-migrate_vma_pages
+++ a/mm/migrate.c
@@ -2822,24 +2822,21 @@ void migrate_vma_pages(struct migrate_vm
mapping = page_mapping(page);
- if (is_zone_device_page(newpage)) {
- if (is_device_private_page(newpage)) {
- /*
- * For now only support private anonymous when
- * migrating to un-addressable device memory.
- */
- if (mapping) {
- migrate->src[i] &= ~MIGRATE_PFN_MIGRATE;
- continue;
- }
- } else {
- /*
- * Other types of ZONE_DEVICE page are not
- * supported.
- */
+ if (is_device_private_page(newpage)) {
+ /*
+ * For now only support private anonymous when migrating
+ * to un-addressable device memory.
+ */
+ if (mapping) {
migrate->src[i] &= ~MIGRATE_PFN_MIGRATE;
continue;
}
+ } else if (is_zone_device_page(newpage)) {
+ /*
+ * Other types of ZONE_DEVICE page are not supported.
+ */
+ migrate->src[i] &= ~MIGRATE_PFN_MIGRATE;
+ continue;
}
r = migrate_page(mapping, newpage, page, MIGRATE_SYNC_NO_COPY);
_
Patches currently in -mm which might be from hch@xxxxxx are
mm-unexport-page_init_poison.patch
mm-remove-a-pointless-config_zone_device-check-in-memremap_pages.patch
mm-remove-the-__kernel__-guard-from-linux-mmh.patch
mm-remove-pointless-includes-from-linux-hmmh.patch
mm-move-free_devmap_managed_page-to-memremapc.patch
mm-simplify-freeing-of-devmap-managed-pages.patch
mm-dont-include-linux-memremaph-in-linux-mmh.patch
mm-remove-the-extra-zone_device-struct-page-refcount.patch
fsdax-depend-on-zone_device-fs_dax_limited.patch
mm-generalize-the-pgmap-based-page_free-infrastructure.patch
mm-refactor-check_and_migrate_movable_pages.patch
mm-refactor-the-zone_device-handling-in-migrate_vma_insert_page.patch
mm-refactor-the-zone_device-handling-in-migrate_vma_pages.patch
mm-move-the-migrate_vma_-device-migration-code-into-its-own-file.patch
mm-build-migrate_vma_-for-all-configs-with-zone_device-support.patch
mm-add-zone-device-coherent-type-memory-support.patch
mm-add-device-coherent-vma-selection-for-memory-migration.patch
