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To: Konstantin Belousov <kostikbel@gmail.com>
cc: John Baldwin <jhb@freebsd.org>, arch@freebsd.org
Subject: Re: Starting APs earlier during boot
In-reply-to: <20160217094241.GF91220@kib.kiev.ua>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
References: <1730061.8Ii36ORVKt@ralph.baldwin.cx>
 <20160217094241.GF91220@kib.kiev.ua>
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Date: Wed, 17 Feb 2016 09:45:43 +0000
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--------
In message <20160217094241.GF91220@kib.kiev.ua>, Konstantin Belousov writes:

>E.g. there might be no interrupts set up yet, and idle thread on UP
>gets on CPU, then the whole boot process could deadlock.

idle_thread:

	while (!interrupts_setup_done())
		yield();

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.