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drm/ttm: add bit flag TTM_OPT_FLAG_FORCE_ALLOC 

set TTM_OPT_FLAG_FORCE_ALLOC when we are servicing for page
fault routine.

for ttm_mem_global_reserve if in page fault routine, allow the gtt
pages reservation always. because page fault routing already grabbed
system memory and the allowance of this exception is harmless.
Otherwise, it will trigger OOM killer.

will be used later.

v2: set the FORCE_ALLOC always
v3: minor refine

Signed-off-by: Roger He <Hongbo.He@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Roger He 2018-01-17 15:07:23 +08:00 committed by Alex Deucher
parent d330fca115
commit aa7662b67b
2 changed files with 6 additions and 2 deletions
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4
drivers/gpu/drm/ttm/ttm_bo_vm.c
View File

@ -226,7 +226,9 @@ static int ttm_bo_vm_fault(struct vm_fault *vmf)
} else {
struct ttm_operation_ctx ctx = {
.interruptible = false,
.no_wait_gpu = false
.no_wait_gpu = false,
.flags = TTM_OPT_FLAG_FORCE_ALLOC
};
ttm = bo->ttm;

4
include/drm/ttm/ttm_bo_api.h
View File

@ -278,7 +278,9 @@ struct ttm_operation_ctx {
};
/* Allow eviction of reserved BOs */
#define TTM_OPT_FLAG_ALLOW_RES_EVICT 0x1
#define TTM_OPT_FLAG_ALLOW_RES_EVICT 0x1
/* when serving page fault or suspend, allow alloc anyway */
#define TTM_OPT_FLAG_FORCE_ALLOC 0x2
/**
* ttm_bo_reference - reference a struct ttm_buffer_object