[PANIC] recent 7.2-STABLE when probing drm

[Kostik Belousov]

On Tue, May 05, 2009 at 12:12:31PM +0100, Gavin Atkinson wrote:
> On Tue, 2009-05-05 at 13:06 +0200, Guido Falsi wrote:
> > Hi!
> > 
> > I'm using FreeBSD/i386 stable on a HP DC7800 PC.
> > 
> > It has an Intel Q35 graphic chip.
> > 
> > After upgrading to a recent stable I experienced a pani on boot, just
> > after probing drm.
> > 
> > I investigated a little and found out that reverting the file
> > 
> > src/sys/dev/pci/pci.c
> > 
> > to rev. 1.355.2.9 (SVN Rev 190092) solves the crash.
> > 
> > I could not investigatte urther right away, but some regression was
> > introduced with this rev.
> > 
> > Is any more information needed?
> 
> When it panics, can you please type "bt" (assuming you have the debugger
> compiled in) and show the output?

I have this too. I have dump too.

drm0: <Intel i945GM> on vgapci0
panic: resource_list_alloc: resource entry is busy
KDB: stack backtrace:
db_trace_self_wrapper(c07214ff,c2b46764,c04c928f,c071f823,c078b080,...) at 0xc044df46 = db_trace_self_wrapper+0x26
kdb_backtrace(c071f823,c078b080,c07211b1,c2b46770,c2b46770,...) at 0xc04f41f9 = kdb_backtrace+0x29
panic(c07211b1,3,10,c04e9484,c2e37000,...) at 0xc04c928f = panic+0xaf
resource_list_alloc(c2cffb04,c2d00a80,c2d00c80,3,c2d2a1fc,...) at 0xc04f0c06 = resource_list_alloc+0xd6
pci_alloc_resource(c2d00a80,c2d00c80,3,c2d2a1fc,0,ffffffff,1,4) at 0xc045a2d1 = pci_alloc_resource+0x581
bus_alloc_resource(c2d00c80,3,c2d2a1fc,0,ffffffff,...) at 0xc04f0a8c = bus_alloc_resource+0x7c
vga_pci_alloc_resource(c2d00c80,c2cfa080,3,c2d2a1fc,0,ffffffff,1,4) at 0xc04600ab = vga_pci_alloc_resource+0x3b
bus_alloc_resource(c2cfa080,3,c2d2a1fc,0,ffffffff,...) at 0xc04f0a8c = bus_alloc_resource+0x7c
drm_alloc_resource(fffffff4,c2d2a000,c2b468fc,c36a0b9b,c2d2a000,...) at 0xc36b7726 = drm_alloc_resource+0xf6
drm_get_resource_start(c2d2a000,0,1,4,c04d2010,...) at 0xc36b780c = drm_get_resource_start+0x1c
i915_driver_load(c2d2a000,6,c36bfe5c,1c2,ffffffff,...) at 0xc36a0b9b = i915_driver_load+0x13b
drm_attach(c2cfa080,c36a59a0,102,c2d00c80,c2cfa0cc,...) at 0xc36bb0e1 = drm_attach+0x4b1
i915_attach(c2cfa080,c32a9054,c0748368,c0721002,80000000,...) at 0xc36a0f41 = i915_attach+0x111
device_attach(c2cfa080,c2cfa080,c2d00c80,c2cfa080,c2d00c80,...) at 0xc04ef707 = device_attach+0x387
device_probe_and_attach(c2cfa080,c2d00c80,c0748358,c2d00c80,0,...) at 0xc04f0702 = device_probe_and_attach+0xe2
bus_generic_driver_added(c2d00c80,c36a5b7c,101,0,c36a5b68,...) at 0xc04f07d5 = bus_generic_driver_added+0x75
devclass_add_driver(c2ca4480,c36a5b7c,c2b46a2c,2d,c36a5b7c,...) at 0xc04ee4c8 = devclass_add_driver+0xc8
driver_module_handler(c2e420c0,0,c36a5b68,0,0,...) at 0xc04ef2a9 = driver_module_handler+0x79
module_register_init(c36a5b5c,c071dad9,c2b46c10,c2b46c0c,0,...) at 0xc04b9d25 = module_register_init+0x105
linker_load_module(0,c2b46c40,2,c2b46c58,c04b7b99,...) at 0xc04b2462 = linker_load_module+0xa02
kern_kldload(c2e79af0,c2d12000,c2b46c70,0,0,...) at 0xc04b294c = kern_kldload+0xec
kldload(c2e79af0,c2b46cfc,4,c2b46d38,c2b46d2c,...) at 0xc04b2ae4 = kldload+0x74
syscall(c2b46d38) at 0xc06f6eb5 = syscall+0x3a5
Xint0x80_syscall() at 0xc06de760 = Xint0x80_syscall+0x20
--- syscall (304, FreeBSD ELF32, kldload), eip = 0x28566d57, esp = 0xbfbfe89c, ebp = 0xbfbfe8a8 ---
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