[Openchrome-users] [openChrome] #417: Unable to map mmio BAR. Argument list too long (7)

[Xavier Bachelot]

On 10/24/2011 03:18 PM, Luc Verhaegen wrote:
> On Mon, Oct 24, 2011 at 12:18:20PM -0000, OpenChrome Trac wrote:
>> #417: Unable to map mmio BAR. Argument list too long (7)
>> -----------------------+----------------------------------------------------
>>   Reporter:  brian     |       Owner:  somebody
>>       Type:  defect    |      Status:  closed  
>>   Priority:  critical  |   Milestone:          
>>  Component:  xdriver   |     Version:  0.2.904 
>> Resolution:  wontfix   |    Keywords:          
>>   Blocking:            |   Blockedby:          
>> -----------------------+----------------------------------------------------
>> Changes (by brian):
>>
>>  * cc: brian@? (added)
>>
>>
>> Comment:
>>
>>  Replying to [comment:3 schlobinux]:
>>  >
>>  > No, it was not a known issue.
>>
>>  Perhaps adding a hint in the Xorg log where the reported error is printed
>>  that lowering memory might help would be useful to future victims.
>>
>>  > This is a limitation of PCI, and it will need TTM support to work
>>  properly. There's nothing that can be done about that currently.
>>
>>  OK.  Fair enough.  But shouldn't that mean leaving this ticket open until
>>  that work is done and this issue is properly resolved?
>>
>>  > You shouldn't notice any performance regression.
>>
>>  Great news, thanx!
>>
>> -- 
>> Ticket URL: <http://www.openchrome.org/trac/ticket/417#comment:4>
>> openChrome <http://www.openchrome.org/>
>> The openChrome project
> 
> Here's an idea.. Why doesn't openchrome try to only map 256MB?
> 
> if (size > (256 << 10)) {
> 	xf86DrvMsg(..., "Only mapping the accessible first 256MB of %dMB 
> available videoram.\n", size >> 10);
> 	size = 256 << 10;
> }
> 
> This worked fine for radeonhd late july 2007, where i for the first time 
> dealt with 1GB cards.
> 
> You'd think that users would be happier with a working X, and a small 
> note stating "we can only use 256MB", over a failing X, and someone 
> stating: "somewhere, over the rainbow, we might have some infrastructure 
> implemented which can actually use that much memory".
> 
> Luc Verhaegen.
> 
This probably could have been written more gently, but after all this
years, I can't say I'm surprised ;-) Thanks for the suggestion.

Regards,
Xavier