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| author | Yinan Liu <yinan@linux.alibaba.com> | 2021-12-12 19:33:58 +0800 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2022-01-13 16:23:04 -0500 |
| commit | 72b3942a173c387b27860ba1069636726e208777 (patch) | |
| tree | f5c9e5f29af4aeae0dbaf9d7232dd985cc5cf4b3 /scripts/Makefile | |
| parent | 1c1857d400355e96f0fe8b32adc6fa7594d03b52 (diff) | |
| download | lwn-72b3942a173c387b27860ba1069636726e208777.tar.gz lwn-72b3942a173c387b27860ba1069636726e208777.zip | |
scripts: ftrace - move the sort-processing in ftrace_init
When the kernel starts, the initialization of ftrace takes
up a portion of the time (approximately 6~8ms) to sort mcount
addresses. We can save this time by moving mcount-sorting to
compile time.
Link: https://lkml.kernel.org/r/20211212113358.34208-2-yinan@linux.alibaba.com
Signed-off-by: Yinan Liu <yinan@linux.alibaba.com>
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: kernel test robot <oliver.sang@intel.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'scripts/Makefile')
| -rw-r--r-- | scripts/Makefile | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/scripts/Makefile b/scripts/Makefile index 9adb6d247818..b082d2f93357 100644 --- a/scripts/Makefile +++ b/scripts/Makefile @@ -17,6 +17,7 @@ hostprogs-always-$(CONFIG_SYSTEM_EXTRA_CERTIFICATE) += insert-sys-cert hostprogs-always-$(CONFIG_SYSTEM_REVOCATION_LIST) += extract-cert HOSTCFLAGS_sorttable.o = -I$(srctree)/tools/include +HOSTLDLIBS_sorttable = -lpthread HOSTCFLAGS_asn1_compiler.o = -I$(srctree)/include HOSTCFLAGS_sign-file.o = $(CRYPTO_CFLAGS) HOSTLDLIBS_sign-file = $(CRYPTO_LIBS) @@ -29,7 +30,10 @@ ARCH := x86 endif HOSTCFLAGS_sorttable.o += -I$(srctree)/tools/arch/x86/include HOSTCFLAGS_sorttable.o += -DUNWINDER_ORC_ENABLED -HOSTLDLIBS_sorttable = -lpthread +endif + +ifdef CONFIG_DYNAMIC_FTRACE +HOSTCFLAGS_sorttable.o += -DMCOUNT_SORT_ENABLED endif # The following programs are only built on demand |