CONFIG_CPU_HAS_WB is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
Writeback Buffer available
modulename: wbflush.ko
configname: CONFIG_CPU_HAS_WB
Linux/MIPS Kernel Configuration
└─>CPU selection
└─>Writeback Buffer available
In linux kernel since version 2.6.12
Say N here for slightly better performance. You must say Y here for
machines which require flushing of write buffers in software. Saying
Y is the safe option; N may result in kernel malfunction and crashes.
machines which require flushing of write buffers in software. Saying
Y is the safe option; N may result in kernel malfunction and crashes.