Re: [PATCH 00/14] x86/unwind/orc: ORC fixes

[Miroslav Benes]

On Thu, 12 Mar 2020, Josh Poimboeuf wrote:

> Several ORC unwinder cleanups, fixes, and debug improvements.
> 
> Jann Horn (1):
>   x86/entry/64: Fix unwind hints in rewind_stack_do_exit()
> 
> Josh Poimboeuf (12):
>   x86/dumpstack: Add SHOW_REGS_IRET mode
>   objtool: Fix stack offset tracking for indirect CFAs
>   x86/entry/64: Fix unwind hints in register clearing code
>   x86/entry/64: Fix unwind hints in kernel exit path
>   x86/entry/64: Fix unwind hints in __switch_to_asm()
>   x86/unwind/orc: Convert global variables to static
>   x86/unwind: Prevent false warnings for non-current tasks
>   x86/unwind/orc: Prevent unwinding before ORC initialization
>   x86/unwind/orc: Fix error path for bad ORC entry type
>   x86/unwind/orc: Fix premature unwind stoppage due to IRET frames
>   x86/unwind/orc: Add more unwinder warnings
>   x86/unwind/orc: Add 'unwind_debug' cmdline option
> 
> Miroslav Benes (1):
>   x86/unwind/orc: Don't skip the first frame for inactive tasks
> 
>  .../admin-guide/kernel-parameters.txt         |   6 +
>  arch/x86/entry/calling.h                      |  40 ++--
>  arch/x86/entry/entry_64.S                     |  14 +-
>  arch/x86/include/asm/kdebug.h                 |   1 +
>  arch/x86/include/asm/unwind.h                 |   2 +-
>  arch/x86/kernel/dumpstack.c                   |  27 +--
>  arch/x86/kernel/dumpstack_64.c                |   3 +-
>  arch/x86/kernel/process_64.c                  |   7 +-
>  arch/x86/kernel/unwind_frame.c                |   3 +
>  arch/x86/kernel/unwind_orc.c                  | 185 ++++++++++++++----
>  tools/objtool/check.c                         |   2 +-
>  11 files changed, 201 insertions(+), 89 deletions(-)

Apart from the two nits I mentioned and Jann's comment on comment, it 
looks good to me.

Reviewed-by: Miroslav Benes <mbenes@xxxxxxx>

M