http://bugzilla.kernel.org/show_bug.cgi?id=12771
--- Comment #1 from ka...@colleduc.ee 2009-03-04 12:00 ---
The oops still occurs with 2.6.29-rc7. An additional thing to note is that it
only happens with EXA turned on, but not with UXA.
I compiled my kernel with CONFIG_DEBUG_INFO and examined vmlinux with gdb:
(gdb) list *i915_gem_flush+0x131
0xc02be421 is in i915_gem_flush (drivers/gpu/drm/i915/i915_gem.c:1203).
1198
1199#if WATCH_EXEC
1200DRM_INFO(%s: queue flush %08x to ring\n, __func__,
cmd);
1201#endif
1202BEGIN_LP_RING(2);
1203OUT_RING(cmd);
1204OUT_RING(0); /* noop */
1205ADVANCE_LP_RING();
1206}
1207}
And the oops itself with WATCH_EXEC defined in i915_drv.h:
[drm:i915_mem_init_heap] *ERROR* heap already initialized?6[drm] buffers_ptr
136692264 buffer_count 1 len 01d8
[drm] i915_gem_execbuffer: invalidate_domains 0008 flush_domains 0001
[drm] i915_gem_flush: invalidate 0008 flush 0001
[drm] i915_gem_flush: queue flush 0204 to ring
BUG: unable to handle kernel paging request at 34c8
IP: [c02be421] i915_gem_flush+0x131/0x170
*pde =
Oops: 0002 [#1] PREEMPT
last sysfs file: /sys/devices/pci:00/:00:1e.0/:02:08.0/resource
Modules linked in: ipv6 snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq
snd_seq_device snd_pcm_oss snd_mixer_oss snd_intel8x0 irtty_sir snd_ac97_codec
ac97_bus sir_dev snd_pcm irda ipw2200 snd_timer snd libipw thinkpad_acpi
soundcore yenta_socket e100 rfkill sr_mod rsrc_nonstatic snd_page_alloc
ehci_hcd 8250_pnp 8250_pci lib80211 mii video crc_ccitt led_class uhci_hcd
pcmcia_core sg cdrom 8250 serial_core output
Pid: 2733, comm: X Not tainted (2.6.29-rc7 #2) 2887AVG
EIP: 0060:[c02be421] EFLAGS: 00213212 CPU: 0
EIP is at i915_gem_flush+0x131/0x170
EAX: 34c8 EBX: 0001 ECX: 34cc EDX: 34d0
ESI: 0204 EDI: f7134400 EBP: f5e07dfc ESP: f5e07dd8
DS: 007b ES: 007b FS: GS: 0033 SS: 0068
Process X (pid: 2733, ti=f5e06000 task=f5efb840 task.ti=f5e06000)
Stack:
c043f548 c03d113d 0204 0001 f703b000 0204 0009 0008
0001 f5e07eb8 c02c15b2 c043ffd0 c03d1237 0008 0001 b7999000
c178c600 c0152640 f5e07e6c f5d10ec0 f68aedc0 f7134400
Call Trace:
[c02c15b2] ? i915_gem_execbuffer+0xda2/0xdd0
[c0152640] ? filemap_fault+0x0/0x4c0
[c0113f26] ? do_page_fault+0x2d6/0x750
[c02aabc2] ? drm_gem_object_lookup+0x32/0x70
[c02a9290] ? drm_ioctl+0xe0/0x2f0
[c017a121] ? do_sync_write+0xd1/0x110
[c02c0810] ? i915_gem_execbuffer+0x0/0xdd0
[c01874a1] ? vfs_ioctl+0x81/0x90
[c0187632] ? do_vfs_ioctl+0x72/0x5c0
[c0125d97] ? _local_bh_enable+0x27/0xa0
[c017ab10] ? vfs_write+0x100/0x140
[c017a050] ? do_sync_write+0x0/0x110
[c0187bb9] ? sys_ioctl+0x39/0x70
[c0103431] ? sysenter_do_call+0x12/0x25
[c03a] ? unix_stream_connect+0x3a0/0x490
Code: 04 e8 39 db 0e 00 8b 75 ec 83 7e 20 07 7e 42 8b 45 ec 8b 75 f0 8b 50 1c
8b 48 14 8b 58 0c 8d 04 11 83 c2 04 21 da 01 d1 83 c2 04 8930 21 da c7 01 00
00 00 00 8b 45 ec 83 68 20 08 89 50 1c 8b
EIP: [c02be421] i915_gem_flush+0x131/0x170 SS:ESP 0068:f5e07dd8
---[ end trace 832e8b45814ff199 ]---
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