VkMemoryOverallocationBehaviorAMD(3)

# VkMemoryOverallocationBehaviorAMD(3) Manual Page

## Name

VkMemoryOverallocationBehaviorAMD - Specify memory overallocation behavior

## C Specification

Possible values for VkDeviceMemoryOverallocationCreateInfoAMD::`overallocationBehavior` include:

    // Provided by VK_AMD_memory_overallocation_behavior
    typedef enum VkMemoryOverallocationBehaviorAMD {
        VK_MEMORY_OVERALLOCATION_BEHAVIOR_DEFAULT_AMD = 0,
        VK_MEMORY_OVERALLOCATION_BEHAVIOR_ALLOWED_AMD = 1,
        VK_MEMORY_OVERALLOCATION_BEHAVIOR_DISALLOWED_AMD = 2,
    } VkMemoryOverallocationBehaviorAMD;

## Description

- VK_MEMORY_OVERALLOCATION_BEHAVIOR_DEFAULT_AMD lets the implementation decide if overallocation is allowed.

- VK_MEMORY_OVERALLOCATION_BEHAVIOR_ALLOWED_AMD specifies overallocation is allowed if platform permits.

- VK_MEMORY_OVERALLOCATION_BEHAVIOR_DISALLOWED_AMD specifies the application is not allowed to allocate device memory beyond the heap sizes reported by VkPhysicalDeviceMemoryProperties. Allocations that are not explicitly made by the application within the scope of the Vulkan instance are not accounted for.

## See Also

VK_AMD_memory_overallocation_behavior, VkDeviceMemoryOverallocationCreateInfoAMD

## Document Notes

For more information, see the Vulkan Specification.

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

## Copyright

Copyright 2014-2026 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0