Oops with 2.6.29-rc7 on POWER5

[Josh Boyer]

On Tue, Mar 10, 2009 at 11:36:15AM +1100, Benjamin Herrenschmidt wrote:
>On Mon, 2009-03-09 at 20:05 -0400, Josh Boyer wrote:
>> [c00000000fffb830] [c0000000005fe504] .mutex_lock_nested+0x78/0x4b0
>> (unreliable)
>> [c00000000fffb950] [c00000000039d520] .echo_char_raw+0x40/0x98
>> [c00000000fffb9f0] [c00000000039fd68] .n_tty_receive_buf+0xb48/0x1104
>> [c00000000fffbbb0] [c0000000003a3a08] .flush_to_ldisc+0x160/0x244
>> [c00000000fffbc80] [c0000000003a3b5c] .tty_flip_buffer_push+0x70/0x9c
>> [c00000000fffbd10] [c0000000003b9e94] .hvsi_interrupt+0x464/0x590
>> [c00000000fffbe50] [c000000000119168] .handle_IRQ_event+0x60/0xdc
>> [c00000000fffbef0] [c00000000011baf0] .handle_fasteoi_irq+0x108/0x1a8
>> 
>Do that patch help ?

Yes.  No more oopses on the hvc console when I hit 'enter'.

>Alan, any comment about the races talked about in those comments ? Are
>they still something I should worry about ?

If not, we should look at getting this into 2.6.29.  I know it's getting
very late, but having kernels oops whenever someone hits enter on the
console probably isn't very good either.

josh