{
ttm_tt_unpopulate(bdev, ttm);
- if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTENT_SWAP) &&
- ttm->swap_storage)
+ if (ttm->swap_storage)
fput(ttm->swap_storage);
ttm->swap_storage = NULL;
struct file *swap_storage;
struct page *from_page;
struct page *to_page;
- int i;
- int ret = -ENOMEM;
+ gfp_t gfp_mask;
+ int i, ret;
swap_storage = ttm->swap_storage;
BUG_ON(swap_storage == NULL);
swap_space = swap_storage->f_mapping;
+ gfp_mask = mapping_gfp_mask(swap_space);
+ if (ttm->page_flags & TTM_PAGE_FLAG_NO_RETRY)
+ gfp_mask |= __GFP_RETRY_MAYFAIL;
for (i = 0; i < ttm->num_pages; ++i) {
- gfp_t gfp_mask = mapping_gfp_mask(swap_space);
-
- gfp_mask |= (ttm->page_flags & TTM_PAGE_FLAG_NO_RETRY ? __GFP_RETRY_MAYFAIL : 0);
- from_page = shmem_read_mapping_page_gfp(swap_space, i, gfp_mask);
-
+ from_page = shmem_read_mapping_page_gfp(swap_space, i,
+ gfp_mask);
if (IS_ERR(from_page)) {
ret = PTR_ERR(from_page);
goto out_err;
}
to_page = ttm->pages[i];
- if (unlikely(to_page == NULL))
+ if (unlikely(to_page == NULL)) {
+ ret = -ENOMEM;
goto out_err;
+ }
copy_highpage(to_page, from_page);
put_page(from_page);
}
- if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTENT_SWAP))
- fput(swap_storage);
+ fput(swap_storage);
ttm->swap_storage = NULL;
ttm->page_flags &= ~TTM_PAGE_FLAG_SWAPPED;
return 0;
+
out_err:
return ret;
}
-int ttm_tt_swapout(struct ttm_bo_device *bdev,
- struct ttm_tt *ttm, struct file *persistent_swap_storage)
+int ttm_tt_swapout(struct ttm_bo_device *bdev, struct ttm_tt *ttm)
{
struct address_space *swap_space;
struct file *swap_storage;
struct page *from_page;
struct page *to_page;
- int i;
- int ret = -ENOMEM;
-
- if (!persistent_swap_storage) {
- swap_storage = shmem_file_setup("ttm swap",
- ttm->num_pages << PAGE_SHIFT,
- 0);
- if (IS_ERR(swap_storage)) {
- pr_err("Failed allocating swap storage\n");
- return PTR_ERR(swap_storage);
- }
- } else {
- swap_storage = persistent_swap_storage;
+ gfp_t gfp_mask;
+ int i, ret;
+
+ swap_storage = shmem_file_setup("ttm swap",
+ ttm->num_pages << PAGE_SHIFT,
+ 0);
+ if (IS_ERR(swap_storage)) {
+ pr_err("Failed allocating swap storage\n");
+ return PTR_ERR(swap_storage);
}
swap_space = swap_storage->f_mapping;
+ gfp_mask = mapping_gfp_mask(swap_space);
+ if (ttm->page_flags & TTM_PAGE_FLAG_NO_RETRY)
+ gfp_mask |= __GFP_RETRY_MAYFAIL;
for (i = 0; i < ttm->num_pages; ++i) {
- gfp_t gfp_mask = mapping_gfp_mask(swap_space);
-
- gfp_mask |= (ttm->page_flags & TTM_PAGE_FLAG_NO_RETRY ? __GFP_RETRY_MAYFAIL : 0);
-
from_page = ttm->pages[i];
if (unlikely(from_page == NULL))
continue;
ttm_tt_unpopulate(bdev, ttm);
ttm->swap_storage = swap_storage;
ttm->page_flags |= TTM_PAGE_FLAG_SWAPPED;
- if (persistent_swap_storage)
- ttm->page_flags |= TTM_PAGE_FLAG_PERSISTENT_SWAP;
return 0;
+
out_err:
- if (!persistent_swap_storage)
- fput(swap_storage);
+ fput(swap_storage);
return ret;
}
* @kref: Reference count of this buffer object. When this refcount reaches
* zero, the object is destroyed or put on the delayed delete list.
* @mem: structure describing current placement.
- * @persistent_swap_storage: Usually the swap storage is deleted for buffers
- * pinned in physical memory. If this behaviour is not desired, this member
- * holds a pointer to a persistent shmem object.
* @ttm: TTM structure holding system pages.
* @evicted: Whether the object was evicted without user-space knowing.
* @deleted: True if the object is only a zombie and already deleted.
*/
struct ttm_resource mem;
- struct file *persistent_swap_storage;
struct ttm_tt *ttm;
bool deleted;
#define TTM_PAGE_FLAG_WRITE (1 << 3)
#define TTM_PAGE_FLAG_SWAPPED (1 << 4)
-#define TTM_PAGE_FLAG_PERSISTENT_SWAP (1 << 5)
#define TTM_PAGE_FLAG_ZERO_ALLOC (1 << 6)
#define TTM_PAGE_FLAG_DMA32 (1 << 7)
#define TTM_PAGE_FLAG_SG (1 << 8)
* and cache flushes and potential page splitting / combining.
*/
int ttm_tt_set_placement_caching(struct ttm_tt *ttm, uint32_t placement);
-int ttm_tt_swapout(struct ttm_bo_device *bdev, struct ttm_tt *ttm, struct file *persistent_swap_storage);
+int ttm_tt_swapout(struct ttm_bo_device *bdev, struct ttm_tt *ttm);
/**
* ttm_tt_populate - allocate pages for a ttm