Direct Cache Access (DCA) Support

configname: CONFIG_IGB_DCA

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Ethernet driver support
└─>Direct Cache Access (DCA) Support
In linux kernel since version 2.6.28 (release Date: 2008-12-24)  
Say Y here if you want to use Direct Cache Access (DCA) in the
driver. DCA is a method for warming the CPU cache before data
is used, with the intent of lessening the impact of cache misses.