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Subject2.6.29-rc1: BUG: unable to handle kernel paging request at 000077fed87bb6bf
This bug occurs in 2.6.29-rc1 as well as the latest linux-2.6 git tree.
I've tried bisecting but there are at least 3 unrelated oopses on my
system since 2.6.28 that prevented me from isolating the problem.

[ 23.339994] BUG: unable to handle kernel paging request at 000077fed87bb6bf
[ 23.340983] IP: [<ffffffff8024e021>] wq_per_cpu+0x1e/0x24
[ 23.340983] PGD 0
[ 23.340983] Oops: 0000 [#1] SMP
[ 23.340983] last sysfs file: /sys/devices/pci0000:00/0000:00:02.0/0000:01:00.0/0000:02:00.0/0000:03:00.0/0000:04:01.0/host1/target1:0:5/1:0:5:0/rev
[ 23.340983] CPU 0
[ 23.340983] Modules linked in: sg sd_mod crc_t10dif mptspi mptscsih mptbase scsi_transport_spi qla2xxx scsi_transport_fc floppy scsi_mod button parport_pc serio_raw parport rtc_cmos rtc_core rtc_lib i2c_i801 i2c_core ehci_hcd uhci_hcd pcspkr shpchp e1000e nfs lockd nfs_acl auth_rpcgss sunrpc
[ 23.340983] Pid: 0, comm: swapper Not tainted 2.6.29-rc1 #1
[ 23.340983] RIP: 0010:[<ffffffff8024e021>] [<ffffffff8024e021>] wq_per_cpu+0x1e/0x24
[ 23.340983] RSP: 0018:ffffffff808bbe78 EFLAGS: 00010246
[ 23.340983] RAX: 000077fed87bb6bf RBX: ffff88013dd32810 RCX: ffff88013dd32830
[ 23.340983] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff880128d7ff80
[ 23.340983] RBP: ffffffff808bbe78 R08: 0000000000000010 R09: ffffffff808bbf20
[ 23.340983] R10: 0000000000000000 R11: ffffffff808bbf50 R12: 0000000000000100
[ 23.340983] R13: ffffffff8024e99a R14: ffffffff808bbec8 R15: ffffffff808ff398
[ 23.340983] FS: 0000000000000000(0000) GS:ffffffff808c4080(0000) knlGS:0000000000000000
[ 23.340983] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
[ 23.340983] CR2: 000077fed87bb6bf CR3: 0000000000201000 CR4: 00000000000006e0
[ 23.340983] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 23.340983] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 23.340983] Process swapper (pid: 0, threadinfo ffffffff80842000, task ffffffff8066a360)
[ 23.340983] Stack:
[ 23.340983] ffffffff808bbe98 ffffffff8024e9c3 ffffffff80242ba0 ffffffff808fd780
[ 23.340983] ffffffff808bbf08 ffffffff80247862 ffffffff808b6d80 ffffffff808fef98
[ 23.340983] ffffffff808feb98 ffffffff808fe798 ffffffff808bbec8 ffffffff808bbec8
[ 23.340983] Call Trace:
[ 23.340983] <IRQ> <0> [<ffffffff8024e9c3>] delayed_work_timer_fn+0x29/0x38
[ 23.340983] [<ffffffff80242ba0>] ? set_normalized_timespec+0x9/0x38
[ 23.340983] [<ffffffff80247862>] run_timer_softirq+0x15c/0x1cb
[ 23.340983] [<ffffffff8024374e>] __do_softirq+0x86/0x145
[ 23.340983] [<ffffffff8020d3bc>] call_softirq+0x1c/0x28
[ 23.340983] [<ffffffff8020e3a1>] do_softirq+0x39/0x7b
[ 23.340983] [<ffffffff802436c6>] irq_exit+0x44/0x46
[ 23.340983] [<ffffffff805350c0>] smp_apic_timer_interrupt+0x99/0xb2
[ 23.340983] [<ffffffff8020cdf3>] apic_timer_interrupt+0x13/0x20
[ 23.340983] <EOI> <0>Code: d0 48 3b 48 40 c9 0f 94 c0 0f b6 c0 c3 55 48 89 e5 e8 f4 de fb ff 83 7f 20 00 74 06 8b 35 e8 fd 5e 00 48 8b 07 48 63 d6 48 f7 d0 <48> 8b 04 d0 c9 c3 55 48 89 e5 41 54 53 48 83 ec 10 e8 c9 de fb
[ 23.340983] RIP [<ffffffff8024e021>] wq_per_cpu+0x1e/0x24
[ 23.340983] RSP <ffffffff808bbe78>
[ 23.340983] CR2: 000077fed87bb6bf
[ 23.614640] ---[ end trace 59b682ce1b8e5668 ]---
[ 23.619417] Kernel panic - not syncing: Fatal exception in interrupt
.config is at
http://downloads.lustre.org/people/scjody/lkml/config_2009-01-13

Bisect log is at
http://downloads.lustre.org/people/scjody/lkml/bisect_2009-01-13-2

I marked anything that got further than 'Starting udev:' (where the
above problem happened) as "good" but I'm now left with changes to ARM,
regulator, and documentation, so something's wrong with my approach.

Suggestions?

Thanks,
Jody


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