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Date:   Sun, 3 Feb 2019 20:05:53 +0100 (CET)
From:   Jiri Kosina <jikos@kernel.org>
To:     Ben Hutchings <ben@decadent.org.uk>
cc:     linux-kernel@vger.kernel.org, stable@vger.kernel.org,
        akpm@linux-foundation.org, Denis Kirjanov <kda@linux-powerpc.org>,
        WoodhouseDavid <dwmw@amazon.co.uk>,
        Josh Poimboeuf <jpoimboe@redhat.com>,
        Andi Kleen <ak@linux.intel.com>,
        SchauflerCasey <casey.schaufler@intel.com>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Peter Zijlstra <peterz@infradead.org>
Subject: Re: [PATCH 3.16 045/305] x86/speculation: Apply IBPB more strictly
 to avoid cross-process data leak
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On Sun, 3 Feb 2019, Ben Hutchings wrote:

> 3.16.63-rc1 review patch.  If anyone has any objections, please let me know.
> 
> ------------------
> 
> From: Jiri Kosina <jkosina@suse.cz>
> 
> commit dbfe2953f63c640463c630746cd5d9de8b2f63ae upstream.

You really want the whole IBPB+STIBP revamp from upstream, otherwise 
you're going to get noticeable performance penalties on some workloads 
with some microcodes.

-- 
Jiri Kosina
SUSE Labs