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Message-ID: <4935C03A.7030603@gmail.com>
Date: Wed, 03 Dec 2008 00:09:46 +0100
From: Jiri Slaby <jirislaby@gmail.com>
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To: Andrew Morton <akpm@linux-foundation.org>
CC: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Arjan van de Ven <arjan@linux.intel.com>,
       Matt Mackall <mpm@selenic.com>, "Theodore Ts'o" <tytso@mit.edu>
Subject: mmotm 2008-12-01-19-41: early exception (page fault -- deref of 0x20)
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Hi,

while writing out warning about empty mtrr (or any other in the early stage),
I'm getting this:
PANIC: early exception 0e rip 10:ffffffff8025be26 error 0 cr2 20
Pid: 0, comm: swapper Not tainted 2.6.28-rc6-mm1_64 #484
Call Trace:
 [<ffffffff80770195>] early_idt_handler+0x55/0x69
 [<ffffffff8025be26>] ? getnstimeofday+0x46/0xc0
 [<ffffffff80258a81>] ktime_get_real+0x11/0x50
 [<ffffffff803aa8d1>] seed_std_data+0x11/0x30
 [<ffffffff8020ff60>] ? show_trace+0x10/0x20
 [<ffffffff803aa900>] seed_random_pools+0x10/0x30
 [<ffffffff8023dda9>] init_oops_id+0x9/0x40
 [<ffffffff8023dde9>] print_oops_end_marker+0x9/0x20
 [<ffffffff8023dfed>] warn_slowpath+0x9d/0xd0
 [<ffffffff802595e4>] ? up+0x34/0x50
 [<ffffffff8023e77d>] ? release_console_sem+0x1bd/0x210
 [<ffffffff80592c38>] ? printk+0x3c/0x44
 [<ffffffff80776e67>] mtrr_trim_uncached_memory+0x166/0x390
 [<ffffffff8077fca0>] ? early_gart_iommu_check+0xaf/0x2a7
 [<ffffffff80772574>] setup_arch+0x3ec/0x6a8
 [<ffffffff80770adf>] start_kernel+0x65/0x3c6
 [<ffffffff8077027d>] x86_64_start_reservations+0x7d/0x89
 [<ffffffff80770384>] x86_64_start_kernel+0xd8/0xdf
RIP 0x10

The clock is still null in kernel/time/timekeeping.c.

This one is to blame:
random-add-a-way-to-get-some-random-bits-into-the-entropy-pools-early-on.patch
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