xorg 7.2 locks system in current

Hi,

I have todays CURRENT. My machine is Dell Latitude D620 with 945GM 
graphics card.
When I try to run xorg 7.2, my machine hangs and on serial console it 
showed:

uma_zalloc_arg: zone "64" with the following non-sleepable locks held:
exclusive sleep mutex drm device r = 0 (0xc3c06cd8) locked _at_ 
/usr/src/sys/modules/drm/drm/../../../dev/drm/drm_drv.c:907
KDB: enter: witness_warn
[thread pid 739 tid 100092 ]
Stopped at      kdb_enter+0x32: leave
db> bt
Tracing pid 739 tid 100092 td 0xc3fe2220
kdb_enter(c086100b,e63ea9fc,4,1,0,...) at kdb_enter+0x32
witness_warn(5,0,c08bd9fe,c08a71b1,66666666,...) at witness_warn+0x1b9
uma_zalloc_arg(c1072d20,0,102,2,c09d9d64,...) at uma_zalloc_arg+0x34
malloc(2c,c093d0c0,102,12,c4325db0,...) at malloc+0xd2
sysctl_add_oid(c4325dcc,c09d9d64,ffffffff,c4325db0,80000001,...) at 
sysctl_add_oid+0x95
alloc_bounce_zone(44,c09399e0,101,1000,c3c8ec80,...) at 
alloc_bounce_zone+0x16d
bus_dma_tag_create(0,1000,0,ffffffff,ffffffff,...) at 
bus_dma_tag_create+0x1a9
drm_pci_alloc(c3c06c00,1000,1000,ffffffff,20000,...) at drm_pci_alloc+0xe1
i915_dma_init(c3bf3800,80446440,c4325e80,3,c3fe2220,...) at 
i915_dma_init+0x2b8
drm_ioctl(c3bf3800,80446440,c4325e80,3,c3fe2220,...) at drm_ioctl+0x357
giant_ioctl(c3bf3800,80446440,c4325e80,3,c3fe2220,...) at giant_ioctl+0x56
devfs_ioctl_f(c3e70048,80446440,c4325e80,c405c500,c3fe2220,...) at 
devfs_ioctl_f+0xc9
kern_ioctl(c3fe2220,8,80446440,c4325e80,0,...) at kern_ioctl+0x243
ioctl(c3fe2220,e63eacfc,c,c089e511,c0935830,...) at ioctl+0x134
syscall(e63ead38) at syscall+0x2b3
Xint0x80_syscall() at Xint0x80_syscall+0x20
--- syscall (54, FreeBSD ELF32, ioctl), eip = 0x483decc3, esp = 
0xbfbfea5c, ebp = 0xbfbfea78 ---
db>
db> c
uma_zalloc_arg: zone "16" with the following non-sleepable locks held:
exclusive sleep mutex drm device r = 0 (0xc3c06cd8) locked _at_ 
/usr/src/sys/modules/drm/drm/../../../dev/drm/drm_drv.c:907
KDB: enter: witness_warn
[thread pid 739 tid 100092 ]
Stopped at      kdb_enter+0x32: leave
db>

thanks,

Ganbold

-- 
Inspiration without perspiration is usually sterile.