x86: Deactivate kernel options with extra overhead

Deactivate CONFIG_CONTEXT_TRACKING_USER_FORCE: Force user context
tracking: This is a testing feature which should not be activate in
production environments according to the Kconfig help. It adds an extra
overhead.

Deactivate CONFIG_RCU_NOCB_CPU_DEFAULT_ALL: Offload RCU callback
processing from all CPUs by default: This option should only be used in
aggressive HPC or real-time workloads which we do not have in OpenWrt.
For normal workloads it increases the number of context switches.

In the default Arch Linux kernel both options are not activated.

Fixes: 31111680f6fc ("x86: switch config to a tickless kernel")
Link: https://github.com/openwrt/openwrt/pull/17057
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
(cherry picked from commit ed523454454965da07c9c7a009ae0a3995aa7c33)
Link: https://github.com/openwrt/openwrt/pull/17097
Signed-off-by: Petr Štetiar <ynezz@true.cz>

diff --git a/target/linux/x86/config-6.6 b/target/linux/x86/config-6.6
index b3d15bc1047494ede36a3beab1a82d39eb4609f3..c416bb6a08dd7b02ad362de3bd9981eecb2f367e 100644 (file)
--- a/target/linux/x86/config-6.6
+++ b/target/linux/x86/config-6.6
@@ -46,7 +46,7 @@ CONFIG_COMPAT_32=y
 CONFIG_COMPAT_32BIT_TIME=y
 # CONFIG_COMPAT_VDSO is not set
 CONFIG_CONSOLE_TRANSLATIONS=y
-CONFIG_CONTEXT_TRACKING_USER_FORCE=y
+# CONFIG_CONTEXT_TRACKING_USER_FORCE is not set
 # CONFIG_CPU5_WDT is not set
 CONFIG_CPU_FREQ=y
 CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
@@ -334,7 +334,7 @@ CONFIG_PTP_1588_CLOCK_OPTIONAL=y
 CONFIG_RANDSTRUCT_NONE=y
 CONFIG_RATIONAL=y
 CONFIG_RCU_LAZY=y
-CONFIG_RCU_NOCB_CPU_DEFAULT_ALL=y
+# CONFIG_RCU_NOCB_CPU_DEFAULT_ALL is not set
 CONFIG_RD_BZIP2=y
 CONFIG_RD_GZIP=y
 CONFIG_RETHUNK=y