linux-kernel - Re: [tip:x86/pti] x86/speculation: Use Indirect Branch Prediction Barrier in context switch

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Message-ID: <1517840309.31953.153.camel@infradead.org>
Date:   Mon, 05 Feb 2018 14:18:29 +0000
From:   David Woodhouse <dwmw2@...radead.org>
To:     mingo@...nel.org, hpa@...or.com, tim.c.chen@...ux.intel.com,
        linux-kernel@...r.kernel.org, tglx@...utronix.de, luto@...nel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-mm <linux-mm@...ck.org>
Subject: Re: [tip:x86/pti] x86/speculation: Use Indirect Branch Prediction
 Barrier in context switch

On Tue, 2018-01-30 at 14:39 -0800, tip-bot for Tim Chen wrote:
> Thanks to the reviewers and Andy Lutomirski for the suggestion of
> using ctx_id which got rid of the problem of mm pointer recycling.

That one doesn't backport well to 4.9. Suggestions welcome.
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