13 => 8 KB
12 => 4 KB
+config CONSOLE_FLUSH_ON_HOTPLUG
+ bool "Enable console flush configurable in hot plug code path"
+ depends on HOTPLUG_CPU
+ def_bool n
+ help
+ In cpu hot plug path console lock acquire and release causes the
+ console to flush. If console lock is not free hot plug latency
+ increases. So make console flush configurable in hot plug path
+ and default disabled to help in cpu hot plug latencies.
+
config LOG_CPU_MAX_BUF_SHIFT
int "CPU kernel log buffer size contribution (13 => 8 KB, 17 => 128KB)"
depends on SMP
config PAGE_COUNTER
bool
+config CGROUP_SCHEDTUNE
+ bool "CFS tasks boosting cgroup subsystem (EXPERIMENTAL)"
+ depends on SCHED_TUNE
+ help
+ This option provides the "schedtune" controller which improves the
+ flexibility of the task boosting mechanism by introducing the support
+ to define "per task" boost values.
+
+ This new controller:
+ 1. allows only a two layers hierarchy, where the root defines the
+ system-wide boost value and its direct childrens define each one a
+ different "class of tasks" to be boosted with a different value
+ 2. supports up to 16 different task classes, each one which could be
+ configured with a different boost value
+
+ Say N if unsure.
+
config MEMCG
bool "Memory Resource Controller for Control Groups"
select PAGE_COUNTER
config CFS_BANDWIDTH
bool "CPU bandwidth provisioning for FAIR_GROUP_SCHED"
depends on FAIR_GROUP_SCHED
+ depends on !SCHED_WALT
default n
help
This option allows users to define CPU bandwidth rates (limits) for
endif # CGROUPS
+config SCHED_HMP
+ bool "Scheduler support for heterogenous multi-processor systems"
+ depends on SMP && FAIR_GROUP_SCHED
+ help
+ This feature will let the scheduler optimize task placement on
+ systems made of heterogeneous cpus i.e cpus that differ either
+ in their instructions per-cycle capability or the maximum
+ frequency they can attain.
+
+config SCHED_HMP_CSTATE_AWARE
+ bool "CPU C-state aware scheduler"
+ depends on SCHED_HMP
+ help
+ This feature will let the HMP scheduler optimize task placement
+ with CPUs C-state. If this is enabled, scheduler places tasks
+ onto the shallowest C-state CPU among the most power efficient CPUs.
+
+config SCHED_CORE_CTL
+ bool "QTI Core Control"
+ depends on SMP
+ help
+ This options enables the core control functionality in
+ the scheduler. Core control automatically offline and
+ online cores based on cpu load and utilization.
+
+ If unsure, say N here.
+
config CHECKPOINT_RESTORE
bool "Checkpoint/restore support" if EXPERT
select PROC_CHILDREN
endchoice
+config HAVE_LD_DEAD_CODE_DATA_ELIMINATION
+ bool
+ help
+ This requires that the arch annotates or otherwise protects
+ its external entry points from being discarded. Linker scripts
+ must also merge .text.*, .data.*, and .bss.* correctly into
+ output sections. Care must be taken not to pull in unrelated
+ sections (e.g., '.text.init'). Typically '.' in section names
+ is used to distinguish them from label names / C identifiers.
+
+config LD_DEAD_CODE_DATA_ELIMINATION
+ bool "Dead code and data elimination (EXPERIMENTAL)"
+ depends on HAVE_LD_DEAD_CODE_DATA_ELIMINATION
+ depends on EXPERT
+ help
+ Enable this if you want to do dead code and data elimination with
+ the linker by compiling with -ffunction-sections -fdata-sections,
+ and linking with --gc-sections.
+
+ This can reduce on disk and in-memory size of the kernel
+ code and static data, particularly for small configs and
+ on small systems. This has the possibility of introducing
+ silently broken kernel if the required annotations are not
+ present. This option is not well tested yet, so use at your
+ own risk.
+
config SYSCTL
bool
menuconfig EXPERT
bool "Configure standard kernel features (expert users)"
- # Unhide debug options, to make the on-by-default options visible
- select DEBUG_KERNEL
help
This option allows certain base kernel options and settings
to be disabled or tweaked. This is for specialized
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