linux-kernel - Re: [PATCH 07/11] x86/pkeys: Drop the preempt-disable section

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Message-ID: <20181012202633.xj5jkg753b6uf6s7@linutronix.de>
Date:   Fri, 12 Oct 2018 22:26:34 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     Dave Hansen <dave.hansen@...ux.intel.com>,
        LKML <linux-kernel@...r.kernel.org>, X86 ML <x86@...nel.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krcmar <rkrcmar@...hat.com>,
        kvm list <kvm@...r.kernel.org>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        Rik van Riel <riel@...riel.com>
Subject: Re: [PATCH 07/11] x86/pkeys: Drop the preempt-disable section

On 2018-10-12 11:07:28 [-0700], Andy Lutomirski wrote:
> All these "if" statements in the FPU code are messy and make
> understanding and reviewing this code hard.
> 
> Can you prepare a patch for the beginning of your series that removes
> fpu->initialized and just ensures that the fpu is always initialized?
> This will regress performance, but you should get all that performance
> back with TIF_LOAD_FPU.

okay, will do.

Sebastian