linux-kernel - Re: [PATCH v6] x86: load FPU registers on return to userland

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Message-ID: <20190130122713.GG18383@zn.tnic>
Date:   Wed, 30 Jan 2019 13:27:13 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org,
        Andy Lutomirski <luto@...nel.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        kvm@...r.kernel.org, "Jason A. Donenfeld" <Jason@...c4.com>,
        Rik van Riel <riel@...riel.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>
Subject: Re: [PATCH v6] x86: load FPU registers on return to userland

On Wed, Jan 30, 2019 at 01:06:47PM +0100, Sebastian Andrzej Siewior wrote:
> I don't know if hackbench would show anything besides noise.

Yeah, if a sensible benchmark (dunno if hackbench is among them :))
shows no difference, is also saying something.

-- 
Regards/Gruss,
    Boris.

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