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drm/amdgpu: move VM page tables to the LRU end on CS v2

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This makes it less likely to run into an ENOMEM because
VM page tables are evicted last.

v2: move the BOs in the LRU tail after validation

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2016-01-11 15:35:21 +01:00 committed by Alex Deucher
parent ab74961810
commit eceb8a1562
3 changed files with 35 additions and 1 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu.h
View file

@ -987,6 +987,8 @@ void amdgpu_vm_get_pd_bo(struct amdgpu_vm *vm,
struct list_head *validated,
struct amdgpu_bo_list_entry *entry);
void amdgpu_vm_get_pt_bos(struct amdgpu_vm *vm, struct list_head *duplicates);
void amdgpu_vm_move_pt_bos_in_lru(struct amdgpu_device *adev,
struct amdgpu_vm *vm);
int amdgpu_vm_grab_id(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
struct amdgpu_sync *sync);
void amdgpu_vm_flush(struct amdgpu_ring *ring,

7
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
View file

@ -428,8 +428,10 @@ static int amdgpu_cs_parser_relocs(struct amdgpu_cs_parser *p)
r = amdgpu_cs_list_validate(p->adev, &fpriv->vm, &duplicates);
error_validate:
if (r)
if (r) {
amdgpu_vm_move_pt_bos_in_lru(p->adev, &fpriv->vm);
ttm_eu_backoff_reservation(&p->ticket, &p->validated);
}
error_reserve:
if (need_mmap_lock)
@ -473,8 +475,11 @@ static int cmp_size_smaller_first(void *priv, struct list_head *a,
**/
static void amdgpu_cs_parser_fini(struct amdgpu_cs_parser *parser, int error, bool backoff)
{
struct amdgpu_fpriv *fpriv = parser->filp->driver_priv;
unsigned i;
amdgpu_vm_move_pt_bos_in_lru(parser->adev, &fpriv->vm);
if (!error) {
/* Sort the buffer list from the smallest to largest buffer,
* which affects the order of buffers in the LRU list.

27
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
View file

@ -119,6 +119,33 @@ void amdgpu_vm_get_pt_bos(struct amdgpu_vm *vm, struct list_head *duplicates)
list_add(&entry->tv.head, duplicates);
}
}
/**
* amdgpu_vm_move_pt_bos_in_lru - move the PT BOs to the LRU tail
*
* @adev: amdgpu device instance
* @vm: vm providing the BOs
*
* Move the PT BOs to the tail of the LRU.
*/
void amdgpu_vm_move_pt_bos_in_lru(struct amdgpu_device *adev,
struct amdgpu_vm *vm)
{
struct ttm_bo_global *glob = adev->mman.bdev.glob;
unsigned i;
spin_lock(&glob->lru_lock);
for (i = 0; i <= vm->max_pde_used; ++i) {
struct amdgpu_bo_list_entry *entry = &vm->page_tables[i].entry;
if (!entry->robj)
continue;
ttm_bo_move_to_lru_tail(&entry->robj->tbo);
}
spin_unlock(&glob->lru_lock);
}
/**