linux-kernel - Re: [patch 0/2] x86: Prevent Split-Lock-Detection wreckage on VMX hypervisors

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Message-ID: <20200402144618.GC20730@hirez.programming.kicks-ass.net>
Date:   Thu, 2 Apr 2020 16:46:18 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     "Kenneth R. Crudup" <kenny@...ix.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Jessica Yu <jeyu@...nel.org>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Xiaoyao Li <xiaoyao.li@...el.com>,
        Nadav Amit <namit@...are.com>,
        Thomas Hellstrom <thellstrom@...are.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Tony Luck <tony.luck@...el.com>,
        Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [patch 0/2] x86: Prevent Split-Lock-Detection wreckage on VMX
 hypervisors

On Thu, Apr 02, 2020 at 07:41:41AM -0700, Kenneth R. Crudup wrote:
> 
> On Thu, 2 Apr 2020, Peter Zijlstra wrote:
> 
> > Hmm, you're not seeing this:
> >   +       pr_warn("disabled due to VMLAUNCH in module: %s\n", me->name);
> > fire when you load the vmware kernel module?
> 
> I just looked back at the syslog's copy of the kernel messages at the time
> I'd tried it, and no, I don't see that message.

Dang!

> > Could you slip me a copy of that thing by private mail?
> 
> OK, gimme a couple of days though, I've gotta get a little work done.
> (Also, what "thing" exactly did you want?)

All the .ko files that come with vmware. I want to dig through them to
see why the VMLAUNCH detection thing isn't working.