drm, irqs, etc.

[John Baldwin]

On 06-Nov-2003 Eric Anholt wrote:
> On Wed, 2003-11-05 at 21:24, Mike Hoskins wrote:
>> first, i apologize...  i didn't think i'd get real answers on -questions
>> so i'm posting this here.  i realize 5.x isn't really "stable" yet, but i
>> hope it's close enough to be relevant.  ;)
>> 
>> i've got XFree86 4.3.0 installed, from the "X-4" meta port.  that went
>> smoothly.  using the mga driver with a matrox g450 (dual head).  no dri on
>> head 2 as expected, but again no obvious problems.
>> 
>> what i've noticed (this is 5.1-p8) is that after X has been running for
>> awhile, trying to exit X causes a hang.  at first i thought it was some
>> program under X not exiting properly (that's what it looks like), but i've
>> reproduced the same behavior with nothing but X running.  if i start X and
>> then exit immediately, everything is fine.  this seems to only happen
>> after X runs for a week or more.
>> 
>> the one thing i noticed, was some "interesting" behavior wrt drm and it's
>> claimed IRQ.  before starting X (after a reboot), `ps ax|grep irq` shows:
>> 
>>    19  ??  WL     0:00.00  (irq9: pcm0 acpi0)
>>    20  ??  WL     0:00.10  (irq14: ata0)
>>    21  ??  WL     0:00.00  (irq15: ata1)
>>    22  ??  WL     0:00.00  (irq10: fxp0)
>>    23  ??  WL     0:00.00  (irq6: fdc0)
>>    24  ??  WL     0:00.01  (irq1: atkbd0)
>> 
>> the same from within X shows,
>> 
>>    19  ??  WL     0:00.00  (irq9: pcm0 acpi0)
>>    20  ??  WL     0:01.05  (irq14: ata0)
>>    21  ??  WL     0:00.00  (irq15: ata1)
>>    22  ??  WL     0:00.02  (irq10: fxp0)
>>    23  ??  WL     0:00.00  (irq6: fdc0)
>>    24  ??  WL     0:00.08  (irq1: atkbd0)
>>    25  ??  WL     0:00.09  (irq12: psm0)
>>   690  ??  WL     0:00.12  (irq11: drm0)
>> 
>> and once exiting X (immediately, when it exits without hanging),
>> 
>>    19  ??  WL     0:00.00  (irq9: pcm0 acpi0)
>>    20  ??  WL     0:01.04  (irq14: ata0)
>>    21  ??  WL     0:00.00  (irq15: ata1)
>>    22  ??  WL     0:00.02  (irq10: fxp0)
>>    23  ??  WL     0:00.00  (irq6: fdc0)
>>    24  ??  WL     0:00.07  (irq1: atkbd0)
>>    25  ??  WL     0:00.06  (irq12: psm0)
>>   690  ??  WL     0:00.08  (irq11:)
>> 
>> is irq11 not being freed?  or is that normal behavior?  i've double
>> checked by X config, but i may have something wrong.  i've read various
>> web pages and XFree's suggestions about configuring the g450...  but,
>> again, i may have overlooked something.

This is correct.  Current currently doesn't try to destroy ithreads
when they lose all their handlers.

-- 

John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/