On Mon, 2010-02-15 at 23:55 +0100, Christian Borntraeger wrote:
> Am Montag 15 Februar 2010 10:53:48 schrieb Christian Borntraeger:
> I think this regression is triggered by
> 
> commit 39c9bfb453b748ce220ceefacbe2a5c19fabf67b
> Author: Ben Skeggs <bske...@redhat.com>
> Date:   Tue Feb 9 10:22:29 2010 +1000
> 
>     drm/nv50: prevent multiple init tables being parsed at the same time
> 
> One possible solution is to replace the spinlock bios->lock with a mutex, 
> but there are others ways of fixing this BUG.
> 
> CCing Ben.
Ah, it appears the vbios delay opcodes got changed to use sleeps rather
than delays at some point without me noticing.  Sent a patch to Dave
changing the code to use a mutex instead for now.

Thanks,
Ben.
> 
> 
> 
> > [    2.175437] BUG: scheduling while atomic: nouveau/0/753/0x00000002       
> >                                                                             
> >                     
> > [    2.175439] Modules linked in:                                           
> >                                                                             
> >                     
> > [    2.175442] Pid: 753, comm: nouveau/0 Not tainted 2.6.33-rc8-prerelease 
> > #27                                                                         
> >                      
> > [    2.175443] Call Trace:                                                  
> >                                                                             
> >                     
> > [    2.175451]  [<ffffffff815dcdea>] ? schedule+0x86a/0x880                 
> >                                                                             
> >                     
> > [    2.175454]  [<ffffffff8120a420>] ? vsnprintf+0xe0/0x9a0                 
> >                                                                             
> >                     
> > [    2.175456]  [<ffffffff815dd18c>] ? schedule_timeout+0x15c/0x250         
> >                                                                             
> >                     
> > [    2.175460]  [<ffffffff81068570>] ? process_timeout+0x0/0x10             
> >                                                                             
> >                     
> > [    2.175462]  [<ffffffff81069068>] ? msleep+0x18/0x30                     
> >                                                                             
> >                     
> > [    2.175466]  [<ffffffff812d48d1>] ? init_time+0x51/0x90                  
> >                                                                             
> >                     
> > [    2.175468]  [<ffffffff812d3ffb>] ? parse_init_table+0xcb/0x1a0          
> >                                                                             
> >                     
> > [    2.175470]  [<ffffffff812d424a>] ? init_sub_direct+0x4a/0xd0            
> >                                                                             
> >                     
> > [    2.175472]  [<ffffffff812d3ffb>] ? parse_init_table+0xcb/0x1a0          
> >                                                                             
> >                     
> > [    2.175474]  [<ffffffff812d496f>] ? 
> > nouveau_bios_run_init_table+0x5f/0xa0                                       
> >                                                          
> > [    2.175476]  [<ffffffff812d4c0c>] ? 
> > nouveau_bios_run_display_table+0x25c/0x500                                  
> >                                                          
> > [    2.175480]  [<ffffffff812fd220>] ? 
> > nv50_display_irq_handler_bh+0x0/0x410                                       
> >                                                          
> > [    2.175483]  [<ffffffff812fd4cc>] ? 
> > nv50_display_irq_handler_bh+0x2ac/0x410                                     
> >                                                          
> > [    2.175485]  [<ffffffff812fd220>] ? 
> > nv50_display_irq_handler_bh+0x0/0x410                                       
> >                                                          
> > [    2.175487]  [<ffffffff8107047b>] ? worker_thread+0x16b/0x250            
> >                                                                             
> >                     
> > [    2.175490]  [<ffffffff81074240>] ? autoremove_wake_function+0x0/0x30    
> >                                                                             
> >                     
> > [    2.175492]  [<ffffffff81070310>] ? worker_thread+0x0/0x250              
> >                                                                             
> >                     
> > [    2.175494]  [<ffffffff81070310>] ? worker_thread+0x0/0x250              
> >                                                                             
> >                     
> > [    2.175496]  [<ffffffff81073dbe>] ? kthread+0x8e/0xa0                    
> >                                                                             
> >                     
> > [    2.175499]  [<ffffffff81027554>] ? kernel_thread_helper+0x4/0x10        
> >                                                                             
> >                     
> > [    2.175501]  [<ffffffff81073d30>] ? kthread+0x0/0xa0                     
> >                                                                             
> >                     
> > [    2.175503]  [<ffffffff81027550>] ? kernel_thread_helper+0x0/0x10        
> >                                                                             
> >                     
> > [    2.182407] Console: switching to colour frame buffer device 240x75      
> >                                                                             
> >                     
> > [    2.186632] fb0: nouveaufb frame buffer device                           
> >                                                                             
> >                     
> > [    2.186633] registered panic notifier                                    
> >                                                                             
> >                     
> > [    2.186636] [drm] Initialized nouveau 0.0.15 20090420 for 0000:01:00.0 
> > on minor 0  
> > ...
> > 



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