[Intel-gfx] [PATCH 3/3] drm/i915/gtt: ignore min_page_size for paging structures

[Thomas Hellström]

On 6/23/21 1:26 PM, Matthew Auld wrote:
> The min_page_size is only needed for pages inserted into the GTT, and
> for our paging structures we only need at most 4K bytes, so simply
> ignore the min_page_size restrictions here, otherwise we might see some
> severe overallocation on some devices.
>
> Signed-off-by: Matthew Auld <matthew.auld at intel.com>
> Cc: Thomas Hellström <thomas.hellstrom at linux.intel.com>
> ---
>   drivers/gpu/drm/i915/gt/intel_gtt.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.c b/drivers/gpu/drm/i915/gt/intel_gtt.c
> index 084ea65d59c0..61e8a8c25374 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gtt.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gtt.c
> @@ -16,7 +16,7 @@ struct drm_i915_gem_object *alloc_pt_lmem(struct i915_address_space *vm, int sz)
>   {
>   	struct drm_i915_gem_object *obj;
>   
> -	obj = i915_gem_object_create_lmem(vm->i915, sz, 0);
> +	obj = __i915_gem_object_create_lmem_with_ps(vm->i915, sz, sz, 0);

So is this memory always required to be size aligned? or should it say 
sz, PAGE_SIZE?

/Thomas