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drm/amdgpu: Avoid reclaim fs while eviction lock

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[Why]
Avoid reclaim filesystem while eviction lock is held called from
MMU notifier.

[How]
Setting PF_MEMALLOC_NOFS flags while eviction mutex is locked.
Using memalloc_nofs_save / memalloc_nofs_restore API.

Signed-off-by: Alex Sierra <alex.sierra@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Sierra
2019-12-17 16:57:30 -06:00
committed by Alex Deucher
parent a9ffe2a983
commit a269e44989
2 changed files with 38 additions and 8 deletions
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6
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
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@@ -30,6 +30,7 @@
#include <drm/gpu_scheduler.h>
#include <drm/drm_file.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <linux/sched/mm.h>
#include "amdgpu_sync.h"
#include "amdgpu_ring.h"
@@ -239,9 +240,12 @@ struct amdgpu_vm {
/* tree of virtual addresses mapped */
struct rb_root_cached va;
/* Lock to prevent eviction while we are updating page tables */
/* Lock to prevent eviction while we are updating page tables
* use vm_eviction_lock/unlock(vm)
*/
struct mutex eviction_lock;
bool evicting;
unsigned int saved_flags;
/* BOs who needs a validation */
struct list_head evicted;