Re: [PATCH 0/6 v3] [GIT PULL] x86: Workaround for NMI iret woes

[Ingo Molnar <mingo@elte.hu>]

* Steven Rostedt <rostedt@goodmis.org> wrote:

> 
> Ingo,
> 
> I updated the patches to reflect your comments and ran them through
> all my tests again. Below is the full diff between v2 and v3.
> 
> I renamed nmi_preprocess() and nmi_postprocess() to
> nmi_nesting_preprocess() and nmi_nesting_postprocess() to at least
> note that this has to do with nmi nesting. I also commented the
> fact that i386 may loop back to the preprocess.
> 
> I had to move the debug_usage functions to debugreg.h, because
> smp.h includes processor.h where making the inc/dec inline
> caused include header issues.
> 
> -- Steve
> 
> Please pull the latest tip/x86/core-3 tree, which can be found at:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
> tip/x86/core-3
> 
> Head SHA1: 42181186ad4db986fcaa40ca95c6e407e9e79372
> 
> 
> Linus Torvalds (1):
>       x86: Do not schedule while still in NMI context
> 
> Steven Rostedt (5):
>       x86: Document the NMI handler about not using paranoid_exit
>       x86: Add workaround to NMI iret woes
>       x86: Keep current stack in NMI breakpoints
>       x86: Allow NMIs to hit breakpoints in i386
>       x86: Add counter when debug stack is used with interrupts enabled
> 
> ----
>  arch/x86/include/asm/debugreg.h |   22 ++++
>  arch/x86/include/asm/desc.h     |   12 ++
>  arch/x86/kernel/cpu/common.c    |   24 +++++
>  arch/x86/kernel/entry_64.S      |  218 +++++++++++++++++++++++++++++++++------
>  arch/x86/kernel/head_64.S       |    4 +
>  arch/x86/kernel/nmi.c           |  102 ++++++++++++++++++
>  arch/x86/kernel/traps.c         |   20 ++++
>  7 files changed, 369 insertions(+), 33 deletions(-)

Pulled, thanks a lot Steve! I've ran 500 randconfig iterations 
and these bits seem fine.

Thanks,

	Ingo