[LinuxKernel] Tip: How to disable CONFIG_SCHED_INFO

<v5.4>

 

By default kernel is configured with CONFIG_SCHED_INFO=y.

Looking into .config we can notice the followings;

 

# Scheduler Debugging

#

# CONFIG_SCHED_DEBUG is not set

CONFIG_SCHED_INFO=y

# CONFIG_SCHEDSTATS is not set

# end of Scheduler Debugging

 

With below patch, CONFIG_SCHED_INFO can be disabled

 

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug

index ee00c6c..dd70401 100644

--- a/lib/Kconfig.debug

+++ b/lib/Kconfig.debug

@@ -1007,7 +1007,6 @@ config SCHED_INFO

 config SCHEDSTATS

        bool "Collect scheduler statistics"

        depends on DEBUG_KERNEL && PROC_FS

-       select SCHED_INFO

        help

          If you say Y here, additional code will be inserted into the

          scheduler and related routines to collect statistics about

diff --git a/init/Kconfig b/init/Kconfig

index fc4c9f4..4f4fe52 100644

--- a/init/Kconfig

+++ b/init/Kconfig

@@ -569,7 +569,6 @@ config TASKSTATS

 config TASK_DELAY_ACCT

        bool "Enable per-task delay accounting"

        depends on TASKSTATS

-       select SCHED_INFO

        help

          Collect information on time spent by a task waiting for system

          resources like cpu, synchronous block I/O completion and swapping

 

As above patch indicates, CONFIG_SCHED_DEBUG depends on CONGIF_SCHEDSTATS.