Record functions that recurse in the ring buffer
configname: CONFIG_RING_BUFFER_RECORD_RECURSION
Linux Kernel Configuration
└─>Kernel hacking
└─>Tracers
└─>Record functions that recurse in the ring buffer
In linux kernel since version 5.2 (release Date: 2019-07-07)
The ring buffer has its own internal recursion. Although when
recursion happens it wont cause harm because of the protection,
but it does cause an unwanted overhead. Enabling this option will
place where recursion was detected into the ftrace "recursed_functions"
file.
This will add more overhead to cases that have recursion.
recursion happens it wont cause harm because of the protection,
but it does cause an unwanted overhead. Enabling this option will
place where recursion was detected into the ftrace "recursed_functions"
file.
This will add more overhead to cases that have recursion.