linux-kernel - Re: [PATCH RT v2] crypto: limit more FPU-enabled sections

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Message-ID: <20171201134959.GG1612@linutronix.de>
Date:   Fri, 1 Dec 2017 14:50:00 +0100
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Steven Rostedt <rostedt@...dmis.org>,
        linux-rt-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        tglx@...utronix.de
Subject: Re: [PATCH RT v2] crypto: limit more FPU-enabled sections

On 2017-12-01 14:44:54 [+0100], Peter Zijlstra wrote:
> !PREEMPT kernels. The above should work for everyone and would allow
> using 'long' kernel_fpu loops:
> 
> 	kernel_fpu_begin();
> 	while (work) {
> 		do_work();
> 		kernel_fpu_resched();
> 	}
> 	kernel_fpu_end();
> 
> regardless of preempt setting.

Ach, wasn't aware that you wanted that explicit for !PREEMPT kernels,
too. Okay, so let me pick this hunk up as-is for RT and before I throw
it mainline I will add some numbers.

Sebastian