CONFIG_DEBUG_BFIN_HWTRACE_EXPAND is not available for thedefaultarchitecture x86.
Result is shown for architecture blackfin
Expand Trace Buffer greater than 16 entries
configname: CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
Linux Kernel Configuration
└─>Kernel hacking
└─>Expand Trace Buffer greater than 16 entries
In linux kernel since version 2.6.24 (release Date: 2008-01-24)
By selecting this option, every time the 16 hardware entries in
the Blackfin's HW Trace buffer are full, the kernel will move them
into a software buffer, for dumping when there is an issue. This
has a great impact on performance, (an interrupt every 16 change of
flows) and should normally be turned off, except in those nasty
debugging sessions
the Blackfin's HW Trace buffer are full, the kernel will move them
into a software buffer, for dumping when there is an issue. This
has a great impact on performance, (an interrupt every 16 change of
flows) and should normally be turned off, except in those nasty
debugging sessions