[RFC PATCH v2 0/3] Speed booting by sorting ORC unwind tables at build time

[shile . zhang]

From: Shile Zhang <shile.zhang@xxxxxxxxxxxxxxxxx>

This series tries to sort the ORC unwind tables in vmlinux link phase at
build time, help to speed up kernel boot. It's significant for boot time
sensitive products, such as embedded device in IoT, or serverless in
cloud.

Thanks!

Changes from RFC v2:
- removed new added Kconfig and runtime sort code, advised by Josh Poimboeuf.
- some minor refactoring.

v1:
https://www.lkml.org/lkml/2019/11/7/611

Shile Zhang (3):
  scripts: Add sortorctable to sort ORC unwind tables
  kbuild: Sort ORC unwind tables in vmlinux link phase
  x86/unwind/orc: remove run-time ORC unwind tables sort

 arch/x86/kernel/unwind_orc.c |   7 +-
 scripts/.gitignore           |   1 +
 scripts/Makefile             |   2 +
 scripts/link-vmlinux.sh      |  14 ++
 scripts/sortorctable.c       | 251 +++++++++++++++++++++++++++++++++++
 scripts/sortorctable.h       |  26 ++++
 6 files changed, 298 insertions(+), 3 deletions(-)
 create mode 100644 scripts/sortorctable.c
 create mode 100644 scripts/sortorctable.h

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2.24.0.rc2