linux-kernel - Re: [PATCH 00/12] x86/crypto: Fix RBP usage in several crypto .S files

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Message-ID: <20170907071534.ztbxvyfoo7m7esmw@gmail.com>
Date:   Thu, 7 Sep 2017 09:15:34 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     Eric Biggers <ebiggers3@...il.com>
Cc:     Josh Poimboeuf <jpoimboe@...hat.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Mathias Krause <minipli@...glemail.com>,
        Chandramouli Narayanan <mouli@...ux.intel.com>,
        Jussi Kivilinna <jussi.kivilinna@....fi>,
        Peter Zijlstra <peterz@...radead.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        linux-crypto@...r.kernel.org, Eric Biggers <ebiggers@...gle.com>,
        Andy Lutomirski <luto@...nel.org>, Jiri Slaby <jslaby@...e.cz>
Subject: Re: [PATCH 00/12] x86/crypto: Fix RBP usage in several crypto .S
 files


* Eric Biggers <ebiggers3@...il.com> wrote:

> Thanks for fixing these!  I don't have time to review these in detail, but I ran
> the crypto self-tests on the affected algorithms, and they all pass.  I also
> benchmarked them before and after; the only noticable performance difference was
> that sha256-avx2 and sha512-avx2 became a few percent slower.  I don't suppose
> there is a way around that?  Otherwise it's probably not a big deal.

Which CPU model did you use for the test?

Thanks,

	Ingo