linux-kernel - [PATCH 0/2] x86/nmi: Optimize address compares with better jump algorithm

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Date:   Thu, 09 Mar 2017 17:42:04 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     linux-kernel@...r.kernel.org
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Andy Lutomirski <luto@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH 0/2] x86/nmi: Optimize address compares with better jump algorithm

I started working on the x86-32 fentry code and I noticed that I had some
old patches in my local tip/x86/core branch. Looking at them, they still
seem relevant.

They are from 2014 when I was working at Red Hat. I kept the author having
(Red Hat) and since I forward ported them now that I work for VMware,
I used (VMware) in my Signed-off-by.

Both these patches are basically doing the same thing but to different
parts. One is making a better test of the RIP the other is a better
test of the RSP. Each patch describe what they are doing.

Steven Rostedt (Red Hat) (2):
      x86/nmi: Optimize the check for being in the repeat_nmi code
      x86/nmi: Fix and optimize the NMI stack check code

----
 arch/x86/entry/entry_64.S | 32 +++++++++++++++-----------------
 1 file changed, 15 insertions(+), 17 deletions(-)