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To: "Tony Luck" <tony.luck@gmail.com>
Cc: "David Miller" <davem@davemloft.net>, mingo@elte.hu,
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Subject: Re: Strange hang on ia64 with CONFIG_PRINTK_TIME=y
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From: Roland Dreier <rdreier@cisco.com>
Date: Wed, 20 Feb 2008 15:35:58 -0800
In-Reply-To: <12c511ca0802191440q6a2f5604xe6b563c32c3a90b2@mail.gmail.com> (Tony Luck's message of "Tue, 19 Feb 2008 14:40:35 -0800")
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 > I just tried Ingo's patch[1] on a 2.6.25-rc2 kernel with printk timestamps
 > turned on ... and it booted just fine on my tiger4.  The default path
 > for non-boot cpus is from head.S to start_secondary(), and that
 > calls cpu_init() pretty quickly.  There shouldn't normally[2] be any
 > printk() calls on the non-boot cpu before it is safe to do so.

Hmm, current git + Ingo's patch still hangs on boot on my system
("Hitachi Cold Fusion-3e 2S4U" according to DMI).

 - R.