[Intel-xe] [PATCH 4/7] drm/xe: Record each drm client with its VM

[Ghimiray, Himal Prasad]

On 07-09-2023 14:19, Upadhyay, Tejas wrote:
>
> *From:*Ghimiray, Himal Prasad <himal.prasad.ghimiray at intel.com>
> *Sent:* Wednesday, September 6, 2023 3:18 PM
> *To:* Upadhyay, Tejas <tejas.upadhyay at intel.com>; 
> intel-xe at lists.freedesktop.org
> *Cc:* Iddamsetty, Aravind <aravind.iddamsetty at intel.com>
> *Subject:* Re: [PATCH 4/7] drm/xe: Record each drm client with its VM
>
> On 31-08-2023 14:35, Tejas Upadhyay wrote:
>
>     Enable accounting of indirect client memory usage.
>
>     Signed-off-by: Tejas Upadhyay<tejas.upadhyay at intel.com>  <mailto:tejas.upadhyay at intel.com>
>
>     ---
>
>       drivers/gpu/drm/xe/xe_vm.c       | 1 +
>
>       drivers/gpu/drm/xe/xe_vm_types.h | 2 ++
>
>       2 files changed, 3 insertions(+)
>
>     diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
>
>     index 9cbf2f63d641..f5f832c8ed42 100644
>
>     --- a/drivers/gpu/drm/xe/xe_vm.c
>
>     +++ b/drivers/gpu/drm/xe/xe_vm.c
>
>     @@ -2057,6 +2057,7 @@ int xe_vm_create_ioctl(struct drm_device *dev, void *data,
>
>              }
>
>       
>
>              args->vm_id = id;
>
>     +       vm->xef = xef;
>
> shouldn't it be applicable only if |CONFIG_PROC_FS is enabled ? |
>
> Tracking VM is not dependent on proc fs so it does not give relation. 
>  Adding bo and FDINFO read/parse is only dependent on procfs otherwise 
> dummy calls. So I do not think it is necessary. Please let me know if 
> you think otherwise.
>
> Thanks,
>
> Tejas
>
Do we have any other use case in mind for vm tracking ? If yes let it be 
as it is, otherwise making it procfs config dependent is better.

BR

Himal Ghimiray

>       
>
>       #if IS_ENABLED(CONFIG_DRM_XE_DEBUG_MEM)
>
>              /* Warning: Security issue - never enable by default */
>
>     diff --git a/drivers/gpu/drm/xe/xe_vm_types.h b/drivers/gpu/drm/xe/xe_vm_types.h
>
>     index fd2178dbde3a..db8523d81d0f 100644
>
>     --- a/drivers/gpu/drm/xe/xe_vm_types.h
>
>     +++ b/drivers/gpu/drm/xe/xe_vm_types.h
>
>     @@ -336,6 +336,8 @@ struct xe_vm {
>
>       
>
>              /** @batch_invalidate_tlb: Always invalidate TLB before batch start */
>
>              bool batch_invalidate_tlb;
>
>     +       /** @xef: XE file handle for tracking this VM's drm client */
>
>     +       struct xe_file *xef;
>
> Same comment as above.
>
>       };
>
>       
>
>       /** struct xe_vma_op_map - VMA map operation */
>
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