diff --git a/comfy/memory_management.py b/comfy/memory_management.py
index 66df35244..df23e4497 100644
--- a/comfy/memory_management.py
+++ b/comfy/memory_management.py
@@ -38,7 +38,10 @@ def read_tensor_file_slice_into(tensor, destination):
         file_obj.seek(info.offset)
         done = 0
         while done < info.size:
-            n = file_obj.readinto(view[done:])
+            try:
+                n = file_obj.readinto(view[done:])
+            except OSError:
+                return False
             if n <= 0:
                 return False
             done += n
diff --git a/comfy/pinned_memory.py b/comfy/pinned_memory.py
index 8acc327a7..f6fb806c4 100644
--- a/comfy/pinned_memory.py
+++ b/comfy/pinned_memory.py
@@ -1,6 +1,7 @@
-import torch
 import comfy.model_management
 import comfy.memory_management
+import comfy_aimdo.host_buffer
+import comfy_aimdo.torch
 
 from comfy.cli_args import args
 
@@ -12,18 +13,31 @@ def pin_memory(module):
         return
     #FIXME: This is a RAM cache trigger event
     size = comfy.memory_management.vram_aligned_size([ module.weight, module.bias ])
-    pin = torch.empty((size,), dtype=torch.uint8)
-    if comfy.model_management.pin_memory(pin):
-        module._pin = pin
-    else:
+
+    if comfy.model_management.MAX_PINNED_MEMORY <= 0 or (comfy.model_management.TOTAL_PINNED_MEMORY + size) > comfy.model_management.MAX_PINNED_MEMORY:
         module.pin_failed = True
         return False
+
+    try:
+        hostbuf = comfy_aimdo.host_buffer.HostBuffer(size)
+    except RuntimeError:
+        module.pin_failed = True
+        return False
+
+    module._pin = comfy_aimdo.torch.hostbuf_to_tensor(hostbuf)
+    module._pin_hostbuf = hostbuf
+    comfy.model_management.TOTAL_PINNED_MEMORY += size
     return True
 
 def unpin_memory(module):
     if get_pin(module) is None:
         return 0
     size = module._pin.numel() * module._pin.element_size()
-    comfy.model_management.unpin_memory(module._pin)
+
+    comfy.model_management.TOTAL_PINNED_MEMORY -= size
+    if comfy.model_management.TOTAL_PINNED_MEMORY < 0:
+        comfy.model_management.TOTAL_PINNED_MEMORY = 0
+
     del module._pin
+    del module._pin_hostbuf
     return size