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| author | Shile Zhang <shile.zhang@linux.alibaba.com> | 2019-12-04 08:46:32 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-12-13 10:47:58 +0100 |
| commit | 57fa1899428538e314a7e0d52a5b617af082389a (patch) | |
| tree | 37d89c675d2f149bbf51961f45c68752c7929c34 /scripts/Makefile | |
| parent | 1091670637be8bd34a39dd1ddcc0a10a7c88d4e2 (diff) | |
| download | linux-57fa1899428538e314a7e0d52a5b617af082389a.tar.bz2 | |
scripts/sorttable: Implement build-time ORC unwind table sorting
The ORC unwinder has two tables: .orc_unwind_ip and .orc_unwind, which
need to be sorted for binary search. Previously this sorting was done
during bootup.
Sort them at build time to speed up booting.
Add the ORC tables sorting in a parallel build process to speed up the build.
[ mingo: Rewrote the changelog and fixed some comments. ]
Suggested-by: Andy Lutomirski <luto@amacapital.net>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Michal Marek <michal.lkml@markovi.net>
Cc: linux-kbuild@vger.kernel.org
Link: https://lkml.kernel.org/r/20191204004633.88660-7-shile.zhang@linux.alibaba.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'scripts/Makefile')
| -rw-r--r-- | scripts/Makefile | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/scripts/Makefile b/scripts/Makefile index 7491241e3a0d..b0e962611d50 100644 --- a/scripts/Makefile +++ b/scripts/Makefile @@ -24,6 +24,15 @@ HOSTCFLAGS_asn1_compiler.o = -I$(srctree)/include HOSTLDLIBS_sign-file = -lcrypto HOSTLDLIBS_extract-cert = -lcrypto +ifdef CONFIG_UNWINDER_ORC +ifeq ($(ARCH),x86_64) +ARCH := x86 +endif +HOSTCFLAGS_sorttable.o += -I$(srctree)/tools/arch/x86/include +HOSTCFLAGS_sorttable.o += -DUNWINDER_ORC_ENABLED +HOSTLDLIBS_sorttable = -lpthread +endif + always := $(hostprogs-y) $(hostprogs-m) # The following hostprogs-y programs are only build on demand |