Add comments to describe PlatformDriOverrideDxe is used for test purpose.

[mirror_edk2.git] / MdeModulePkg / MdeModulePkg.dec

diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index a557466cd0ea1c32a16282c8919222e2e0571772..9084af7b84e4f83a97718fd7e51215b6b3494790 100644 (file)
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -882,6 +882,11 @@
   ## This PCD specifies whether full PCI enumeration is disabled.\r
   gEfiMdeModulePkgTokenSpaceGuid.PcdPciDisableBusEnumeration|FALSE|BOOLEAN|0x10000048\r
 \r
+  ## Disk I/O - Number of Data Buffer block\r
+  # Define the size in block of the pre-allocated buffer. It provide better\r
+  # performance for large Disk I/O requests\r
+  gEfiMdeModulePkgTokenSpaceGuid.PcdDiskIoDataBufferBlockNum|64|UINT32|0x30001039\r
+\r
 [PcdsPatchableInModule]\r
   ## Specify  memory size with page number for PEI code when \r
   #  the feature of Loading Module at Fixed Address is enabled\r