<html>
    <head>
      <base href="https://bugs.freedesktop.org/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Priority</th>
          <td>high
          </td>
        </tr>

        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - [ILK]igt/gem_reset_stats/ban-render causes GPU hang and *ERROR* render ring :timed out trying to stop ring"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=78685">78685</a>
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>intel-gfx-bugs@lists.freedesktop.org, jinxianx.guo@intel.com
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[ILK]igt/gem_reset_stats/ban-render causes GPU hang and *ERROR* render ring :timed out trying to stop ring
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>major
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>huax.lu@intel.com
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>DRM/Intel
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=99014" name="attach_99014" title="dmesg">attachment 99014</a> <a href="attachment.cgi?id=99014&action=edit" title="dmesg">[details]</a></span>
dmesg

System Environment:
--------------------------
Platform:         Ironlake
Kernel:           (drm-intel-nightly)2be456541ea41728002ccca2de5235f48d14326e

Bug detailed description:
-------------------------
It causes GPU hang on Ironlake with -queued, -fixes and -nightly kernel.
Run on earlier kernel, It also has this issue.
output:
IGT-Version: 1.6-g351e7d3 (x86_64) (Linux:
3.15.0-rc3_drm-intel-nightly_2be456_2                                          
                                                      0140514+ x86_64)
Subtest ban-render: SUCCESS
Test requirement not met in function gem_require_ring, file
ioctl_wrappers.c:813:
Last errno: 0, Success
Test requirement: (!((((intel_get_drm_devid(fd)) == 0x0102 ||
(intel_get_drm_devid(fd)) == 0x0112 || (intel_get_drm_devid(fd)) == 0x0122 ||
(intel_get_drm_devid(fd)) == 0x0106 || (intel_get_drm_devid(fd)) == 0x0116 ||
(intel_get_drm_devid(fd)) == 0x0126 || (intel_get_drm_devid(fd)) == 0x010A) ||
(((intel_get_drm_devid(fd)) == 0x0152 || (intel_get_drm_devid(fd)) == 0x0162 ||
(intel_get_drm_devid(fd)) == 0x0156 || (intel_get_drm_devid(fd)) == 0x0166 ||
(intel_get_drm_devid(fd)) == 0x015a || (intel_get_drm_devid(fd)) == 0x016a) ||
(((intel_get_drm_devid(fd)) == 0x0402 || (intel_get_drm_devid(fd)) == 0x0406 ||
(intel_get_drm_devid(fd)) == 0x040A || (intel_get_drm_devid(fd)) == 0x040B ||
(intel_get_drm_devid(fd)) == 0x040E || (intel_get_drm_devid(fd)) == 0x0C02 ||
(intel_get_drm_devid(fd)) == 0x0C06 || (intel_get_drm_devid(fd)) == 0x0C0A ||
(intel_get_drm_devid(fd)) == 0x0C0B || (intel_get_drm_devid(fd)) == 0x0C0E ||
(intel_get_drm_devid(fd)) == 0x0A02 || (intel_get_drm_devid(fd)) == 0x0A06 ||
(intel_get_drm_devid(fd)) == 0x0A0A || (intel_get_drm_devid(fd)) == 0x0A0B ||
(intel_get_drm_devid(fd)) == 0x0A0E || (intel_get_drm_devid(fd)) == 0x0D02 ||
(intel_get_drm_devid(fd)) == 0x0D06 || (intel_get_drm_devid(fd)) == 0x0D0A ||
(intel_get_drm_devid(fd)) == 0x0D0B || (intel_get_drm_devid(fd)) == 0x0D0E) ||
((intel_get_drm_devid(fd)) == 0x0412 || (intel_get_drm_devid(fd)) == 0x0416 ||
(intel_get_drm_devid(fd)) == 0x041A || (intel_get_drm_devid(fd)) == 0x041B ||
(intel_get_drm_devid(fd)) == 0x041E || (intel_get_drm_devid(fd)) == 0x0C12 ||
(intel_get_drm_devid(fd)) == 0x0C16 || (intel_get_drm_devid(fd)) == 0x0C1A ||
(intel_get_drm_devid(fd)) == 0x0C1B || (intel_get_drm_devid(fd)) == 0x0C1E ||
(intel_get_drm_devid(fd)) == 0x0A12 || (intel_get_drm_devid(fd)) == 0x0A16 ||
(intel_get_drm_devid(fd)) == 0x0A1A || (intel_get_drm_devid(fd)) == 0x0A1B ||
(intel_get_drm_devid(fd)) == 0x0A1E || (intel_get_drm_devid(fd)) == 0x0D12 ||
(intel_get_drm_devid(fd)) == 0x0D16 || (intel_get_drm_devid(fd)) == 0x0D1A ||
(intel_get_drm_devid(fd)) == 0x0D1B || (intel_get_drm_devid(fd)) == 0x0D1E) ||
((intel_get_drm_devid(fd)) == 0x0422 || (intel_get_drm_devid(fd)) == 0x0426 ||
(intel_get_drm_devid(fd)) == 0x042A || (intel_get_drm_devid(fd)) == 0x042B ||
(intel_get_drm_devid(fd)) == 0x042E || (intel_get_drm_devid(fd)) == 0x0C22 ||
(intel_get_drm_devid(fd)) == 0x0C26 || (intel_get_drm_devid(fd)) == 0x0C2A ||
(intel_get_drm_devid(fd)) == 0x0C2B || (intel_get_drm_devid(fd)) == 0x0C2E ||
(intel_get_drm_devid(fd)) == 0x0A22 || (intel_get_drm_devid(fd)) == 0x0A26 ||
(intel_get_drm_devid(fd)) == 0x0A2A || (intel_get_drm_devid(fd)) == 0x0A2B ||
(intel_get_drm_devid(fd)) == 0x0A2E || (intel_get_drm_devid(fd)) == 0x0D22 ||
(intel_get_drm_devid(fd)) == 0x0D26 || (intel_get_drm_devid(fd)) == 0x0D2A ||
(intel_get_drm_devid(fd)) == 0x0D2B || (intel_get_drm_devid(fd)) == 0x0D2E)) ||
((intel_get_drm_devid(fd)) == 0x0f30 || (intel_get_drm_devid(fd)) == 0x0f31 ||
(intel_get_drm_devid(fd)) == 0x0f32 || (intel_get_drm_devid(fd)) == 0x0f33)) ||
(((((intel_get_drm_devid(fd)) & 0xff00) != 0x1600) ? 0 :
((((intel_get_drm_devid(fd)) & 0x00f0) >> 4) > 3) ? 0 :
(((intel_get_drm_devid(fd)) & 0x000f) == 0x2) ? 1 : (((intel_get_drm_devid(fd))
& 0x000f) == 0x6) ? 1 : (((intel_get_drm_devid(fd)) & 0x000f) == 0xb) ? 1 :
(((intel_get_drm_devid(fd)) & 0x000f) == 0xa) ? 1 : (((intel_get_drm_devid(fd))
& 0x000f) == 0xd) ? 1 : (((intel_get_drm_devid(fd)) & 0x000f) == 0xe) ? 1 : 0)
|| ((intel_get_drm_devid(fd)) == 0x22b0 || (intel_get_drm_devid(fd)) == 0x22b1
|| (intel_get_drm_devid(fd)) == 0x22b2 || (intel_get_drm_devid(fd)) ==
0x22b3)))))

# echo $?
0

# dmesg -r | egrep "<[1-6]>" |grep drm
<5>[    0.000000] Linux version 3.15.0-rc3_drm-intel-nightly_2be456_20140514+
(buildtopcommit@x-kernel) (gcc version 4.7.0 20120507 (Red Hat 4.7.0-5) (GCC) )
#2606 SMP Wed May 14 11:26:03 CST 2014
<6>[    0.000000] Command line:
BOOT_IMAGE=kernels//nightly_parents/2014_05_14/drm-intel-nightly/2be456541ea41728002ccca2de5235f48d14326e/bzImage_x86_64
root=/dev/sda2 drm.debug=0xe
modules_path=kernels//nightly_parents/2014_05_14/drm-intel-nightly/2be456541ea41728002ccca2de5235f48d14326e/modules_x86_64/lib/modules/3.15.0-rc3_drm-intel-nightly_2be456_20140514+
<5>[    0.000000] Kernel command line:
BOOT_IMAGE=kernels//nightly_parents/2014_05_14/drm-intel-nightly/2be456541ea41728002ccca2de5235f48d14326e/bzImage_x86_64
root=/dev/sda2 drm.debug=0xe
modules_path=kernels//nightly_parents/2014_05_14/drm-intel-nightly/2be456541ea41728002ccca2de5235f48d14326e/modules_x86_64/lib/modules/3.15.0-rc3_drm-intel-nightly_2be456_20140514+
<6>[    0.668163] usb usb1: Manufacturer: Linux
3.15.0-rc3_drm-intel-nightly_2be456_20140514+ ehci_hcd
<6>[    0.680113] usb usb2: Manufacturer: Linux
3.15.0-rc3_drm-intel-nightly_2be456_20140514+ ehci_hcd
<6>[    0.682131] usb usb3: Manufacturer: Linux
3.15.0-rc3_drm-intel-nightly_2be456_20140514+ uhci_hcd
<6>[    0.683681] usb usb4: Manufacturer: Linux
3.15.0-rc3_drm-intel-nightly_2be456_20140514+ uhci_hcd
<6>[    0.685389] usb usb5: Manufacturer: Linux
3.15.0-rc3_drm-intel-nightly_2be456_20140514+ uhci_hcd
<6>[    0.686879] usb usb6: Manufacturer: Linux
3.15.0-rc3_drm-intel-nightly_2be456_20140514+ uhci_hcd
<6>[    0.688329] usb usb7: Manufacturer: Linux
3.15.0-rc3_drm-intel-nightly_2be456_20140514+ uhci_hcd
<6>[    0.689740] usb usb8: Manufacturer: Linux
3.15.0-rc3_drm-intel-nightly_2be456_20140514+ uhci_hcd
<6>[    1.496414] [drm] Initialized drm 1.1.0 20060810
<6>[    1.500656] [drm] Memory usable by graphics device = 2048M
<6>[    1.513734] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
<6>[    1.513834] [drm] Driver supports precise vblank timestamp query.
<6>[    1.541715] fbcon: inteldrmfb (fb0) is primary device
<6>[    1.617461] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
<6>[    1.617557] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on
minor 0
<6>[   60.815868] [drm] stuck on render ring
<6>[   60.818433] [drm] GPU HANG: ecode 0:0x169955aa, in gem_reset_stats
[3692], reason: Ring hung, action: reset
<6>[   60.818550] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
<6>[   60.818610] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
<6>[   60.818675] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
<6>[   60.818729] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
<6>[   60.818778] [drm] GPU crash dump saved to /sys/class/drm/card0/error
<6>[   60.818985] [drm] Simulated gpu hang, resetting stop_rings
<3>[   61.820788] [drm:stop_ring] *ERROR* render ring :timed out trying to stop
ring
<3>[   62.822775] [drm:stop_ring] *ERROR* render ring :timed out trying to stop
ring
<3>[   62.822813] [drm:init_ring_common] *ERROR* failed to set render ring head
to zero ctl 0001f401 head 00000308 tail 00000390 start 00003000
<6>[   64.815826] [drm] stuck on render ring
<6>[   64.818306] [drm] GPU HANG: ecode 0:0x169955ab, in gem_reset_stats
[3692], reason: Ring hung, action: reset
<6>[   64.818490] [drm] Simulated gpu hang, resetting stop_rings
<3>[   65.819737] [drm:stop_ring] *ERROR* render ring :timed out trying to stop
ring
<3>[   66.821769] [drm:stop_ring] *ERROR* render ring :timed out trying to stop
ring
<3>[   66.821820] [drm:init_ring_common] *ERROR* failed to set render ring head
to zero ctl 0001f401 head 00000308 tail 000005f0 start 00003000
<6>[   68.815769] [drm] stuck on render ring
<6>[   68.818296] [drm] GPU HANG: ecode 0:0x169955ab, reason: Ring hung,
action: reset
<3>[   69.819686] [drm:stop_ring] *ERROR* render ring :timed out trying to stop
ring
<3>[   70.821673] [drm:stop_ring] *ERROR* render ring :timed out trying to stop
ring
<3>[   70.821710] [drm:init_ring_common] *ERROR* failed to set render ring head
to zero ctl 0001f401 head 00000308 tail 00000720 start 00003000
<6>[   72.807713] [drm] stuck on render ring
<6>[   72.810300] [drm] GPU HANG: ecode 0:0x169955ab, in gem_reset_stats
[3692], reason: Ring hung, action: reset
<3>[   73.811638] [drm:stop_ring] *ERROR* render ring :timed out trying to stop
ring
<3>[   74.813624] [drm:stop_ring] *ERROR* render ring :timed out trying to stop
ring
<3>[   74.813662] [drm:init_ring_common] *ERROR* failed to set render ring head
to zero ctl 0001f401 head 00000308 tail 000007b8 start 00003000
<6>[   76.819664] [drm] no progress on render ring
<6>[   76.822147] [drm] GPU HANG: ecode -1:0x00000000, reason: Ring hung,
action: reset
<3>[   77.823586] [drm:stop_ring] *ERROR* render ring :timed out trying to stop
ring
<3>[   78.825573] [drm:stop_ring] *ERROR* render ring :timed out trying to stop
ring
<3>[   78.825613] [drm:init_ring_common] *ERROR* failed to set render ring head
to zero ctl 0001f401 head 00000308 tail 000007b8 start 0000300

Reproduce steps:
---------------------------- 
1. ./gem_reset_stats --run-subtest ban-render</pre>
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