ich777/linux_media
1
0
Fork 0
mirror of https://github.com/tbsdtv/linux_media.git synced 2025-07-23 12:43:29 +02:00
Code Issues Packages Projects Releases Wiki Activity

mm/migrate: add a flags parameter to migrate_vma

Browse Source 
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>
This commit is contained in:
Ralph Campbell
2020-07-23 15:30:00 -07:00
committed by Jason Gunthorpe
parent 1a77decd0c
commit 5143192cd4
5 changed files with 23 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
lib/test_hmm.c
View File

@@ -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;