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From: "Luck, Tony" <tony.luck@intel.com>
To: "Roland Dreier" <rdreier@cisco.com>
Cc: "David Miller" <davem@davemloft.net>, <mingo@elte.hu>,
	<linux-kernel@vger.kernel.org>
Subject: RE: Strange hang on ia64 with CONFIG_PRINTK_TIME=y
Date: Thu, 14 Feb 2008 14:23:59 -0800	[thread overview]
Message-ID: <1FE6DD409037234FAB833C420AA843EC97C8B0@orsmsx424.amr.corp.intel.com> (raw)
In-Reply-To: <ada7ih7qjoq.fsf@cisco.com>

> I guess sched_init() is too early... it does seem really strange to
> me, but I just double checked with Ingo's patch and it does indeed
> hang.  The slow way to make progress is just to go through
> start_kernel() line-by-line and enable cpu_clock() at each stage, and
> see where it stops hanging.  I'll give that a shot as a background
> process (my ia64 box takes quite a while to boot, so each test takes a
> long time but requires very little of my attention).

We *ought* to be safe after cpu_init() ... which is called from setup_arch(),
which is several calls before sched_init().

Thanks for looking at this though ... my ability to test just went
away for a while ... some lab re-organization means all my systems
just got powered off and removed from their rack so the rack can be
moved to a new location.

-Tony

  reply	other threads:[~2008-02-14 22:25 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-13  6:24 Roland Dreier
2008-02-13  7:01 ` David Miller
2008-02-13 12:57   ` Ingo Molnar
2008-02-13 13:02     ` Ingo Molnar
2008-02-14  0:26       ` Roland Dreier
2008-02-13 13:03     ` David Miller
2008-02-13 13:06       ` Ingo Molnar
2008-02-14  0:59       ` Tony Luck
2008-02-14  1:04         ` David Miller
2008-02-14  3:33           ` Tony Luck
2008-02-14  3:47             ` Roland Dreier
2008-02-14 18:24               ` Luck, Tony
2008-02-14 21:27               ` Tony Luck
2008-02-14 22:04                 ` Roland Dreier
2008-02-14 22:23                   ` Luck, Tony [this message]
2008-02-15  2:17                     ` Tony Luck
2008-02-19 22:40                       ` Tony Luck
2008-02-20  8:12                         ` Ingo Molnar
2008-02-20  8:15                           ` David Miller
2008-02-20 23:35                         ` Roland Dreier
2008-02-20 23:36                         ` Roland Dreier

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