[d3d11] Remove d3d11.maxImplicitDiscardSize option

dxvk.conf

@@ -276,14 +276,6 @@
 # dxvk.zeroMappedMemory = False
 
 
-# Resource size limit for implicit discards, in kilobytes. For small staging
-# resources mapped with MAP_WRITE, DXVK will sometimes allocate new backing
-# storage in order to avoid GPU synchronization, so setting this too high
-# may cause memory issues, setting it to -1 disables the feature.
-
-# d3d11.maxImplicitDiscardSize = 256
-
-
 # Resource size limit for buffer-mapped dynamic images, in kilobytes.
 # A higher threshold may reduce memory usage and PCI-E bandwidth in
 # some games, but may also increase GPU synchronizations. Setting it

src/d3d11/d3d11_context_imm.cpp

@@ -17,7 +17,6 @@ namespace dxvk {
     const Rc<DxvkDevice>& Device)
   : D3D11CommonContext<D3D11ImmediateContext>(pParent, Device, 0, DxvkCsChunkFlag::SingleUse),
     m_csThread(Device, Device->createContext()),
-    m_maxImplicitDiscardSize(pParent->GetOptions()->maxImplicitDiscardSize),
     m_submissionFence(new sync::CallbackFence()),
     m_flushTracker(pParent->GetOptions()->reproducibleCommandStream),
     m_stagingBufferFence(new sync::Fence(0)),

src/d3d11/d3d11_context_imm.h

@@ -117,8 +117,6 @@ namespace dxvk {
 
     uint32_t                m_mappedImageCount = 0u;
 
-    VkDeviceSize            m_maxImplicitDiscardSize = 0ull;
-
     Rc<sync::CallbackFence> m_submissionFence;
     uint64_t                m_submissionId = 0ull;
     DxvkSubmitStatus        m_submitStatus;

src/d3d11/d3d11_options.cpp

@@ -36,11 +36,6 @@ namespace dxvk {
     // Clamp LOD bias so that people don't abuse this in unintended ways
     this->samplerLodBias = dxvk::fclamp(this->samplerLodBias, -2.0f, 1.0f);
 
-    int32_t maxImplicitDiscardSize = config.getOption<int32_t>("d3d11.maxImplicitDiscardSize", 256);
-    this->maxImplicitDiscardSize = maxImplicitDiscardSize >= 0
-      ? VkDeviceSize(maxImplicitDiscardSize) << 10
-      : VkDeviceSize(~0ull);
-
     int32_t maxDynamicImageBufferSize = config.getOption<int32_t>("d3d11.maxDynamicImageBufferSize", -1);
     this->maxDynamicImageBufferSize = maxDynamicImageBufferSize >= 0
       ? VkDeviceSize(maxDynamicImageBufferSize) << 10

src/d3d11/d3d11_options.h

@@ -80,9 +80,6 @@ namespace dxvk {
     /// a higher value. May help with frame timing issues.
     int32_t maxFrameLatency;
 
-    /// Limit discardable resource size
-    VkDeviceSize maxImplicitDiscardSize;
-
     /// Limit size of buffer-mapped images
     VkDeviceSize maxDynamicImageBufferSize;
 

src/util/config/config.cpp

@@ -101,7 +101,6 @@ namespace dxvk {
      * set of resources multiple times per frame. */
     { R"(\\QuantumBreak\.exe$)", {{
       { "d3d11.zeroInitWorkgroupMemory",    "True" },
-      { "d3d11.maxImplicitDiscardSize",     "-1"   },
     }} },
     /* Anno 2205: Random crashes with state cache */
     { R"(\\anno2205\.exe$)", {{