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Subject[RFC PATCH 4/4] x86/Kconfig: Add a Kconfig option to sort ORC tables at build time
Date
From: Shile Zhang <shile.zhang@linux.alibaba.com>

Add a new Kconfig BUILDTIME_ORCTABLE_SORT to control the ORC unwind
tables at build time. Select for ORC unwinder on x86_64 by default.

Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com>
---
arch/x86/Kconfig.debug | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index bf9cd83de777..320ff2af4837 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -335,6 +335,15 @@ config UNWINDER_GUESS

endchoice

+config BUILDTIME_ORCTABLE_SORT
+ bool "Sort ORC unwind tables at build time"
+ depends on X86_64
+ depends on UNWINDER_ORC
+ default y
+ help
+ This option enables the build-time sorting for ORC unwind tables. It
+ can help to speed up kernel boot by skip the runtime sorting.
+
config FRAME_POINTER
depends on !UNWINDER_ORC && !UNWINDER_GUESS
bool
--
2.24.0.rc2
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