Re: panic: resource_list_alloc: resource entry is busy

On Wed, 10 Sep 2014, John Baldwin wrote:

> On Wednesday, September 10, 2014 12:45:08 PM Marcin Cieslak wrote:
>> On my CURRENT as of 6 Sep (r271197):
>>
>> What I did was that:
>>
>> - kldload i915
>>
>> - startx
>>
>> During X server start I get the following:
>>
>> #10 0xffffffff808c2947 in resource_list_alloc (rl=<value optimized out>,
>> bus=<value optimized out>, child=<value optimized out>, type=<value
>> optimized out>,
>>      rid=<value optimized out>, start=<value optimized out>, end=<value
>> optimized out>, count=<value optimized out>, flags=<value optimized out>)
>>      at /usr/src/sys/kern/subr_bus.c:3304
>> #11 0xffffffff8061ddae in pci_alloc_resource (dev=<value optimized out>,
>> child=<value optimized out>, type=<value optimized out>, rid=<value
>> optimized out>,
>>      start=<value optimized out>, end=<value optimized out>, count=<value
>> optimized out>, flags=<value optimized out>) at
>> /usr/src/sys/dev/pci/pci.c:4604 #12 0xffffffff808c4420 in
>> bus_alloc_resource (dev=0xfffff800026d8800, type=1, rid=0xffffffff811effc8,
>> start=632, end=18446744071580876744, count=464, flags=100707968) at
>> bus_if.h:284
>> #13 0xffffffff80626092 in vga_pci_alloc_resource (dev=0xfffff800026d8800,
>> child=<value optimized out>, type=1, rid=0xfffff80008c0b2d4, start=0,
>>      end=<value optimized out>, count=18446744071580876744, flags=<value
>> optimized out>) at /usr/src/sys/dev/pci/vga_pci.c:318
>
> Can you load the core dump in kgdb and run 'f 13' and 'p *rid'?

Sure, here it goes:

(kgdb) f 13
#13 0xffffffff80626092 in vga_pci_alloc_resource (
     dev=0xfffff800026d8800, child=<value optimized out>, type=1,
     rid=0xfffff80008c0b2d4, start=0, end=<value optimized out>,
     count=18446744071580876744, flags=<value optimized out>)
     at /usr/src/sys/dev/pci/vga_pci.c:318
318		return (bus_alloc_resource(dev, type, rid, start, end, count, flags));
Current language:  auto; currently minimal
(kgdb) p *rid
$1 = 0

//Marcin