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[v2,0/3] Build ORC fast lookup table in scripts/sorttable tool

Message ID 20200603143123.57364-1-changhuaixin@linux.alibaba.com (mailing list archive)
Headers show
Series Build ORC fast lookup table in scripts/sorttable tool | expand

Message

changhuaixin June 3, 2020, 2:31 p.m. UTC 
Move building of fast lookup table from boot to sorttable tool. This saves us
6380us boot time on Intel(R) Xeon(R) CPU E5-2682 v4 @ 2.50GHz with cores.

Changelog v2:
1. Type of section orc_lookup needs to be SHT_PROGBITS.
2. unwind_init() cannot be removed totally as setting lookup_num_blocks is needed.

Huaixin Chang (3):
  scripts/sorttable: Change section type of orc_lookup to SHT_PROGBITS
  scripts/sorttable: Build orc fast lookup table via sorttable tool
  x86/unwind/orc: Simplify unwind_init() for x86 boot

 arch/x86/kernel/unwind_orc.c      | 40 ----------------
 include/asm-generic/vmlinux.lds.h |  2 +
 scripts/sorttable.h               | 99 ++++++++++++++++++++++++++++++++++++---
 3 files changed, 94 insertions(+), 47 deletions(-)