I915 DRI_PRIME Bug

[Daniel Vetter]

On Sat, Aug 17, 2013 at 9:46 PM, Tobias Klausmann
<tobias.johannes.klausmann at mni.thm.de> wrote:
> Hello there,
> while testing my "Optimus" Notebook i saw a stack trace in my logs, maybe
> someone is interested!
> I can easily reproduce this any time. It happens when offloading a GL app,
> here Unigine Heaven 3.0 to the nvidia card. To be more exactly: When
> starting Unigine the window stays black. To get something useful i have to
> minimize and maximize the window. Exactly when maximizing the window the
> trace happens.
>
> Hope this helps anyway!

Fixed with

commit 4db9434c65e2bc838c3e24f4ae55ae517b45c3e3
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Thu Aug 8 09:10:37 2013 +0200

    drm/i915: unpin backing storage in dmabuf_unmap

which is queued for -next.

Thanks, Daniel
>
> ------------[ cut here ]------------
> WARNING: CPU: 7 PID: 718 at drivers/gpu/drm/i915/i915_gem.c:3967
> i915_gem_free_object+0x124/0x150 [i915]()
> Modules linked in: af_packet bnep fuse snd_hda_codec_hdmi
> snd_hda_codec_realtek snd_hda_intel snd_hda_codec ath3k btusb bluetooth
> uvcvideo snd_hwdep videobuf2_core videodev videobuf2_vmalloc
> videobuf2_memops snd_pcm snd_seq snd_timer arc4 ath9k snd_seq_device
> mac80211 ath9k_common ath9k_hw ath snd iTCO_wdt sdhci_pci sdhci mmc_core
> sr_mod sg tg3 ptp pps_core iTCO_vendor_support cfg80211 lpc_ich i2c_i801
> pcspkr joydev acer_wmi sparse_keymap rfkill cdrom soundcore snd_page_alloc
> mperf battery ac autofs4 i915 xhci_hcd processor scsi_dh_alua scsi_dh_hp_sw
> scsi_dh_emc scsi_dh_rdac scsi_dh nouveau ttm drm_kms_helper drm i2c_algo_bit
> mxm_wmi video thermal_sys wmi button
> CPU: 7 PID: 718 Comm: Xorg Not tainted 3.11.0-rc5-desktop+ #27
> Hardware name: Acer Aspire V3-571G/VA50_HC_CR, BIOS V1.13 10/09/2012
>  0000000000000000 0000000000000009 ffffffff81568703 0000000000000000
>  ffffffff81047f81 ffff88021cf1ab00 ffff88024f1d0000 ffff88025e421930
>  ffff88021c7bcd40 ffff8802540f2da0 ffffffffa0210a44 ffff88021cf1ab00
> Call Trace:
>  [<ffffffff81568703>] ? dump_stack+0x50/0x80
>  [<ffffffff81047f81>] ? warn_slowpath_common+0x81/0xb0
>  [<ffffffffa0210a44>] ? i915_gem_free_object+0x124/0x150 [i915]
>  [<ffffffffa02574d0>] ? i915_gem_dmabuf_release+0x80/0x90 [i915]
>  [<ffffffff813761c3>] ? dma_buf_release+0x23/0x80
>  [<ffffffff8113e4dd>] ? __fput+0xcd/0x230
>  [<ffffffff81063167>] ? task_work_run+0x97/0xd0
>  [<ffffffff81002ab9>] ? do_notify_resume+0x79/0xa0
>  [<ffffffff8156f92a>] ? int_signal+0x12/0x17
> ---[ end trace 99a0c147e69ddcd1 ]---
>
> Thanks,
> Tobias Klausmann
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> dri-devel at lists.freedesktop.org
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch