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authorRalph Campbell <rcampbell@nvidia.com>2020-07-23 15:30:00 -0700
committerJason Gunthorpe <jgg@nvidia.com>2020-07-28 16:20:33 -0300
commit5143192cd410c4fc83be09a2e73423765aee072b (patch)
treee6943dd73d6cad7a9afc3fdeeb90542d5bef4a50 /lib
parent1a77decd0caed0bc5b6f5e474981d574076f0841 (diff)
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mm/migrate: add a flags parameter to migrate_vma
The src_owner field in struct migrate_vma is being used for two purposes, it acts as a selection filter for which types of pages are to be migrated and it identifies device private pages owned by the caller. Split this into separate parameters so the src_owner field can be used just to identify device private pages owned by the caller of migrate_vma_setup(). Rename the src_owner field to pgmap_owner to reflect it is now used only to identify which device private pages to migrate. Link: https://lore.kernel.org/r/20200723223004.9586-3-rcampbell@nvidia.com Signed-off-by: Ralph Campbell <rcampbell@nvidia.com> Reviewed-by: Bharata B Rao <bharata@linux.ibm.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'lib')
-rw-r--r--lib/test_hmm.c15
1 files changed, 4 insertions, 11 deletions
diff --git a/lib/test_hmm.c b/lib/test_hmm.c
index 9aa577afc269..e78a1414f58e 100644
--- a/lib/test_hmm.c
+++ b/lib/test_hmm.c
@@ -585,15 +585,6 @@ static void dmirror_migrate_alloc_and_copy(struct migrate_vma *args,
*/
spage = migrate_pfn_to_page(*src);
- /*
- * Don't migrate device private pages from our own driver or
- * others. For our own we would do a device private memory copy
- * not a migration and for others, we would need to fault the
- * other device's page into system memory first.
- */
- if (spage && is_zone_device_page(spage))
- continue;
-
dpage = dmirror_devmem_alloc_page(mdevice);
if (!dpage)
continue;
@@ -702,7 +693,8 @@ static int dmirror_migrate(struct dmirror *dmirror,
args.dst = dst_pfns;
args.start = addr;
args.end = next;
- args.src_owner = NULL;
+ args.pgmap_owner = NULL;
+ args.flags = MIGRATE_VMA_SELECT_SYSTEM;
ret = migrate_vma_setup(&args);
if (ret)
goto out;
@@ -1053,7 +1045,8 @@ static vm_fault_t dmirror_devmem_fault(struct vm_fault *vmf)
args.end = args.start + PAGE_SIZE;
args.src = &src_pfns;
args.dst = &dst_pfns;
- args.src_owner = dmirror->mdevice;
+ args.pgmap_owner = dmirror->mdevice;
+ args.flags = MIGRATE_VMA_SELECT_DEVICE_PRIVATE;
if (migrate_vma_setup(&args))
return VM_FAULT_SIGBUS;