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

* 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


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