linux-kernel - RE: [PATCH v10 6/6] x86/split_lock: Enable split lock detection by kernel parameter

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Message-ID: <3908561D78D1C84285E8C5FCA982C28F7F4DD20D@ORSMSX115.amr.corp.intel.com>
Date:   Fri, 22 Nov 2019 18:02:04 +0000
From:   "Luck, Tony" <tony.luck@...el.com>
To:     Peter Zijlstra <peterz@...radead.org>
CC:     Ingo Molnar <mingo@...nel.org>,
        "Yu, Fenghua" <fenghua.yu@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        H Peter Anvin <hpa@...or.com>,
        "Raj, Ashok" <ashok.raj@...el.com>,
        "Shankar, Ravi V" <ravi.v.shankar@...el.com>,
        linux-kernel <linux-kernel@...r.kernel.org>, x86 <x86@...nel.org>
Subject: RE: [PATCH v10 6/6] x86/split_lock: Enable split lock detection by
 kernel parameter

> it requires we get the kernel and firmware clean, but only warns about
> dodgy userspace, which I really don't think there is much of.
>
> getting the kernel clean should be pretty simple.

Fenghua has a half dozen additional patches (I think they were
all posted in previous iterations of the patch) that were found by
code inspection, rather than by actually hitting them.

Those should go in ahead of this.

-Tony