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Date: Wed, 10 Dec 2014 16:22:15 -0800
Message-ID: <CA+8MBb+iw3KJz5EgX-DLBHGWANUSVFP2bQe2_U4kqCfM-wzH8Q@mail.gmail.com>
Subject: Re: [PATCH v4 2/5] x86, traps: Track entry into and exit from IST context
From: Tony Luck <tony.luck@gmail.com>
To: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@amacapital.net>,
        Paul McKenney <paulmck@linux.vnet.ibm.com>, X86 ML <x86@kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Peter Zijlstra <peterz@infradead.org>, Oleg Nesterov <oleg@redhat.com>,
        Andi Kleen <andi@firstfloor.org>,
        Josh Triplett <josh@joshtriplett.org>,
        =?UTF-8?B?RnLDqWTDqXJpYyBXZWlzYmVja2Vy?= <fweisbec@gmail.com>
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On Tue, Nov 25, 2014 at 10:58 AM, Borislav Petkov <bp@alien8.de> wrote:
> On Mon, Nov 24, 2014 at 03:52:10PM -0800, Andy Lutomirski wrote:
>> Dunno. Tony and Borislav -- when do you want the IST stack switching
>> stuff?
>
> I'd leave that up to Tony and his testbench. I mean, we can hammer on
> it as much as we can and it can pass all testing locally but the real
> fun starts once it hits upstream and for that it doesn't matter which
> release... IMHO.

So what was the net result of all the mode/RCU discussions?

Do I need some extra magic incantations in the final version
of do_machine_check() beyond what was in this patch:

  https://lkml.kernel.org/r/546d169211835aded@agluck-desk.sc.intel.com

to make everything happy?

-Tony