[openwrt/openwrt] x86: Deactivate kernel options with extra overhead

[LEDE Commits]

ynezz pushed a commit to openwrt/openwrt.git, branch openwrt-24.10:
https://git.openwrt.org/005f0867524ff26e62167b1c71208dd05f33cfb5

commit 005f0867524ff26e62167b1c71208dd05f33cfb5
Author: Hauke Mehrtens <hauke at hauke-m.de>
AuthorDate: Sun Nov 24 14:39:57 2024 +0100

    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 at hauke-m.de>
    (cherry picked from commit ed523454454965da07c9c7a009ae0a3995aa7c33)
    Link: https://github.com/openwrt/openwrt/pull/17097
    Signed-off-by: Petr Štetiar <ynezz at true.cz>
---
 target/linux/x86/config-6.6 | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/target/linux/x86/config-6.6 b/target/linux/x86/config-6.6
index b3d15bc104..c416bb6a08 100644
--- 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