On Mon, 2007-04-02 at 22:47 -0700, Andrew Morton wrote:
quoted text
> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.21-rc5/2.6.21-rc5-mm4/
> 
> - The oops in git-net.patch has been fixed, so that tree has been restored. 
>   It is huge.
> 
> - Added the device-mapper development tree to the -mm lineup (Alasdair
>   Kergon).  It is a quilt tree, living at
>   ftp://ftp.kernel.org/pub/linux/kernel/people/agk/patches/2.6/editing/.
> 
> - Added davidel's signalfd stuff.
> 
> 
> 

I'm getting a kernel panic intermittently, approximately 50% of boots.
The tracing is not always the same, but it always dies on an
atomic_bitop operation.  Here are two hand-copied tracings (for the life
of me, I can't make netconsole work).


/---------------------------First Tracing----------------------/
Oops: 0000 [#1]
last sysfs file: class/firmware/microcode
Modules linked in: ...
....
...
CPU: 0
EIP: ...
EFLAGS:...
EIP is at find_next_zero_bit
...
...
...
Process set_disk_settin
Call Trace:
show_trace_log
show_stack_log
show_register
die
do_page_fault
error_code
recalc_task_prio
activate_task
try_to_wake_up
deault_wake_function
__wake_up_common
__wake_up
sock_def_readable
soc_queue_rev_skb
udp_queue_rcv_skb
__udp4_libr_rcv
udp_rcv
ip_local_delivery
ip_rcv
netif_receive_skb
rtl8139_poll
net_rx_action
__do_soft_irq
do_softirq
irq_exit
do_IRQ
common_interrupt

/---------------------- Second Tracing --------------------------/
CPU: 0
EIP: ...
EFLAGS:...
EIP is at find_next_zero_bit
...
...
...
Process sshd
Call Trace:
show_trace_log
show_stack_log
show_register
die
do_page_fault
error_code
recalc_task_prio
enqueue_task
activate_task
try_to_wake_up
wake_up_state
signal_wake_up
__group_complete_signal
__group_send_signal
group_send_sig_info
send_group_sig_info
it_real_fn
run_hrtimer_softirq
__do_softirq
irq_exit
smp_apic_timer_interrupt
apic_timer_interrupt
error_code

EIP: [<c01bfa1c>. find_next_zero_bit+...

Tony

PS: I might try use a serial console and bisection, but this might take
me a few days.

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