[OpenWrt-Devel] [PATCH 1/2] config: kernel: add KERNEL_X86_VSYSCALL_EMULATION
yszhou4tech at gmail.com
Tue Sep 10 06:39:23 EDT 2019
Binaries in container images may need this. E.g. nginx:1.7.9 used in
k8s default deployment manifest file for demostration 
Signed-off-by: Yousong Zhou <yszhou4tech at gmail.com>
config/Config-kernel.in | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/config/Config-kernel.in b/config/Config-kernel.in
index eeda3e1b6f..d9a9fe687f 100644
@@ -54,6 +54,24 @@ config KERNEL_ARM_PMU
depends on (arm || aarch64)
+ bool "Enable vsyscall emulation"
+ default n
+ depends on x86_64
+ This enables emulation of the legacy vsyscall page. Disabling
+ it is roughly equivalent to booting with vsyscall=none, except
+ that it will also disable the helpful warning if a program
+ tries to use a vsyscall. With this option set to N, offending
+ programs will just segfault, citing addresses of the form
+ This option is required by many programs built before 2013, and
+ care should be used even with newer programs if set to N.
+ Disabling this option saves about 7K of kernel size and
+ possibly 4K of additional runtime pagetable memory.
bool "Compile the kernel with performance events and counters"
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