linux-kernel - Re: [PATCH 3/3] LoongArch: Allow to enable PREEMPT

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Message-ID: <20241118073659.MGircGsm@linutronix.de>
Date: Mon, 18 Nov 2024 08:36:59 +0100
From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To: Clark Williams <clrkwllms@...nel.org>
Cc: Huacai Chen <chenhuacai@...nel.org>,
	Huacai Chen <chenhuacai@...ngson.cn>,
	Xuerui Wang <kernel@...0n.name>, loongarch@...ts.linux.dev,
	Steven Rostedt <rostedt@...dmis.org>,
	linux-rt-devel@...ts.linux.dev, Guo Ren <guoren@...nel.org>,
	Jiaxun Yang <jiaxun.yang@...goat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] LoongArch: Allow to enable PREEMPT_RT

On 2024-11-14 08:43:21 [-0600], Clark Williams wrote:
> We see similar problems with chronyd accessing the RTC on aarch64
> systems that use UEFI. Accessing anything via the EFI Runtime is very
> slow. Probably going to turn off 'rtcsync' in chronyd when running
> low-latency workloads. 

But isn't "we call into EFI and have no clue what happens" exactly the
reason why we disable EFI runtime services?

> Clark

Sebastian