diff options
Diffstat (limited to 'init/Kconfig')
| -rw-r--r-- | init/Kconfig | 71 |
1 files changed, 30 insertions, 41 deletions
diff --git a/init/Kconfig b/init/Kconfig index 65c521f05..f7e8c274a 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -28,29 +28,6 @@ config BUILDTIME_EXTABLE_SORT menu "General setup" -config SCHED_BFS - bool "BFS cpu scheduler" - default n - help - The Brain Fuck CPU Scheduler for excellent interactivity and - responsiveness on the desktop and solid scalability on normal - hardware and commodity servers. Not recommended for 4096 CPUs. - - Currently incompatible with the Group CPU scheduler, and RCU TORTURE - TEST so these options are disabled. - -config SCHED_BFS_AUTOISO - bool "Automatically use SCHED_ISO policy for X" - depends on SCHED_BFS - default n - help - Selecting this option will automatically use the SCHED_ISO scheduling - policy for X, resulting in an interactivity boost. This *may* cause - things like skipping sound on audio applications that are not run - as SCHED_ISO. - - Tasks (including X) can be run as sched_iso manually using schedtool. - config PCK_INTERACTIVE bool "Tune kernel for interactivity" default y @@ -61,17 +38,13 @@ config PCK_INTERACTIVE Mem dirty before bg writeback..: 10 % -> 128 MiB Mem dirty before sync writeback: 20 % -> 256 MiB - --- CPU Scheduler (CFS) --- + --- CPU Scheduler --- Scheduling latency.............: 6 -> 3 ms Minimal granularity............: 0.75 -> 0.3 ms Wakeup granularity.............: 1 -> 0.5 ms CPU migration cost.............: 0.5 -> 0.25 ms Bandwidth slice size...........: 5 -> 3 ms - --- CPU Scheduler (BFS) --- - Scheduling interval............: 6 -> 3 ms - ISO task max realtime use......: 70 % -> 25 % - --- CPU Frequency Scaling --- Ondemand down scaling factor...: 1 -> 10 @@ -400,7 +373,7 @@ choice # Kind of a stub config for the pure tick based cputime accounting config TICK_CPU_ACCOUNTING bool "Simple tick based cputime accounting" - depends on !S390 && !NO_HZ_FULL && !SCHED_BFS + depends on !S390 && !NO_HZ_FULL help This is the basic tick based cputime accounting that maintains statistics about user, system and idle time spent on per jiffies @@ -425,7 +398,6 @@ config VIRT_CPU_ACCOUNTING_GEN bool "Full dynticks CPU time accounting" depends on HAVE_CONTEXT_TRACKING depends on HAVE_VIRT_CPU_ACCOUNTING_GEN - depends on !SCHED_BFS select VIRT_CPU_ACCOUNTING select CONTEXT_TRACKING help @@ -760,7 +732,6 @@ config RCU_NOCB_CPU bool "Offload RCU callback processing from boot-selected CPUs" depends on TREE_RCU || PREEMPT_RCU depends on RCU_EXPERT || NO_HZ_FULL - depends on !SCHED_BFS default n help Use this option to reduce OS jitter for aggressive HPC or @@ -971,7 +942,6 @@ config NUMA_BALANCING depends on ARCH_SUPPORTS_NUMA_BALANCING depends on !ARCH_WANT_NUMA_VARIABLE_LOCALITY depends on SMP && NUMA && MIGRATION - depends on !SCHED_BFS help This option adds support for automatic NUMA aware memory/task placement. The mechanism is quite primitive and is based on migrating memory when @@ -1058,7 +1028,6 @@ config PROC_PID_CPUSET config CGROUP_CPUACCT bool "Simple CPU accounting cgroup subsystem" - depends on !SCHED_BFS help Provides a simple Resource Controller for monitoring the total CPU consumed by the tasks in a cgroup. @@ -1144,7 +1113,6 @@ config CGROUP_PERF menuconfig CGROUP_SCHED bool "Group CPU scheduler" - depends on !SCHED_BFS default n help This feature lets CPU scheduler recognize task groups and control CPU @@ -1219,7 +1187,7 @@ config CGROUP_WRITEBACK endif # CGROUPS config CHECKPOINT_RESTORE - bool "Checkpoint/restore support" + bool "Checkpoint/restore support" if EXPERT select PROC_CHILDREN default n help @@ -1292,7 +1260,6 @@ endif # NAMESPACES config SCHED_AUTOGROUP bool "Automatic process group scheduling" - depends on !SCHED_BFS select CGROUPS select CGROUP_SCHED select FAIR_GROUP_SCHED @@ -1374,13 +1341,36 @@ source "usr/Kconfig" endif +choice + prompt "Code optimization level" + default CC_OPTIMIZE_DEFAULT + help + Select the optimization flag to pass to the compiler, + affecting kernel size, speed and compilation time. + + If in doubt, choose the default optimization level. + +config CC_OPTIMIZE_DEFAULT + bool "Default optimization" + help + This option will pass "-O2" to your compiler. This is + the recommended level and the most tested. + +config CC_OPTIMIZE_HARDER + bool "Optimize harder" + help + This option will pass "-O3" to your compiler resulting + in a larger and faster kernel. The more complex + optimizations also increase compilation time and may + affect stability. + config CC_OPTIMIZE_FOR_SIZE bool "Optimize for size" help - Enabling this option will pass "-Os" instead of "-O2" to - your compiler resulting in a smaller kernel. + This option will pass "-Os" to your compiler resulting + in a smaller kernel. - If unsure, say N. +endchoice config SYSCTL bool @@ -1784,7 +1774,6 @@ choice This option allows to select a slab allocator. config SLAB - depends on !SCHED_BFS bool "SLAB" help The regular slab allocator that is established and known to work @@ -1802,7 +1791,7 @@ config SLUB a slab allocator. config SLOB - depends on EXPERT && !SCHED_BFS + depends on EXPERT bool "SLOB (Simple Allocator)" help SLOB replaces the stock allocator with a drastically simpler |