With CONFIG_NUMA_BALANCING=y and booting with numa_balancing=enable
there is a crash very early in the lifetime of the system. By setting
earlyprintk=ttyS0,115200 the error is visible and looks something like
this
[ 0.000000] Kernel command line: BOOT_IMAGE=/vmlinuz-3.11.0-vanilla+
root=/dev/sda5 reboot=pci console=tty0 console=ttyS0,115200
numa_balancing=enable earlyprintk=ttyS0,115200
[ 0.000000] Unexpected op at task_numa_fault+0x1d/0xa0 [ffffffff81085ded]
(0f 1f 44 00 00) arch/x86/kernel/jump_label.c:53
PANIC: early exception 06 rip 10:ffffffff815b2663 error 0 cr2 ffff88107ffff000
[ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 3.11.0-vanilla+ #23
[ 0.000000] Hardware name: Dell Inc. PowerEdge R810/0TT6JF, BIOS 2.7.4
04/26/2012
[ 0.000000] ffffffff81009220 ffffffff81a01e10 ffffffff815b7e7b
00000000000003f8
[ 0.000000] ffffffff81085ded ffffffff81a01ec8 ffffffff81ad4197
6a2f6c656e72656b
[ 0.000000] 2f3638782f686372 000000000000012b 6562616c5f706d75
ffffffff81c68444
[ 0.000000] Call Trace:
[ 0.000000] [<ffffffff81009220>] ? alternatives_text_reserved+0x80/0x80
[ 0.000000] [<ffffffff815b7e7b>] dump_stack+0x55/0x86
[ 0.000000] [<ffffffff81085ded>] ? task_numa_fault+0x1d/0xa0
[ 0.000000] [<ffffffff81ad4197>] early_idt_handler+0x77/0xa4
[ 0.000000] [<ffffffff815b2663>] ? bug_at+0x45/0x47
[ 0.000000] [<ffffffff815b2663>] ? bug_at+0x45/0x47
[ 0.000000] [<ffffffff81006db6>] __jump_label_transform.isra.0+0x136/0x150
[ 0.000000] [<ffffffff81006ea7>] arch_jump_label_transform_static+0x77/0xc0
[ 0.000000] [<ffffffff81af8596>] jump_label_init+0x81/0xaf
[ 0.000000] [<ffffffff81ad4c02>] start_kernel+0x161/0x3ce
[ 0.000000] [<ffffffff81ad48a0>] ? repair_env_string+0x5e/0x5e
[ 0.000000] [<ffffffff81ad45a5>] x86_64_start_reservations+0x2a/0x2c
[ 0.000000] [<ffffffff81ad469f>] x86_64_start_kernel+0xf8/0xfc
[ 0.000000] RIP 0x46
Bisection identified this as the problem commit.
9c85f3bdf400665eecf62658a9106501f6a77a13 is the first bad commit
commit 9c85f3bdf400665eecf62658a9106501f6a77a13
Author: Steven Rostedt <srost...@redhat.com>
Date: Thu Jan 26 18:38:07 2012 -0500
x86/jump-label: Add safety checks to jump label conversions
I did no further investigation yet in case this is already a known
problem.
--
Mel Gorman
SUSE Labs
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