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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [bsw] i915_gem_context_free WARN_ON(!list_empty(&ppgtt->base.active_list))"
href="https://bugs.freedesktop.org/show_bug.cgi?id=92638">92638</a>
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<th>Summary</th>
<td>[bsw] i915_gem_context_free WARN_ON(!list_empty(&ppgtt->base.active_list))
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>DRI git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
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<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>chris@chris-wilson.co.uk
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<pre>Spotted whilst running igt/gem_concurrent_blit. Rare.
[ 92.791996] WARNING: CPU: 0 PID: 1352 at
drivers/gpu/drm/i915/i915_gem_context.c:144 i915_gem_context_free+0x1b5/0x1d0()
[ 92.792010] WARN_ON(!list_empty(&ppgtt->base.active_list))
[ 92.792018] CPU: 0 PID: 1352 Comm: gem_concurrent_ Not tainted 4.3.0-rc6+
#151
[ 92.792034] Hardware name: /NUC5CPYB, BIOS
PYBSWCEL.86A.0027.2015.0507.1758 05/07/2015
[ 92.792047] ffffffff818ee4f0 ffff880065e2fa88 ffffffff812602cf
ffff880065e2fad0
[ 92.792066] ffff880065e2fac0 ffffffff8106b55d ffff88005386ec00
ffff880276275a00
[ 92.792084] ffff880037f34000 ffff880234822b50 ffff880275b441f8
ffff880065e2fb20
[ 92.792103] Call Trace:
[ 92.792115] [<ffffffff812602cf>] dump_stack+0x44/0x55
[ 92.792127] [<ffffffff8106b55d>] warn_slowpath_common+0x7d/0xb0
[ 92.792137] [<ffffffff8106b60c>] warn_slowpath_fmt+0x4c/0x50
[ 92.792147] [<ffffffff813633b5>] i915_gem_context_free+0x1b5/0x1d0
[ 92.792182] [<ffffffff8137076b>] i915_gem_request_free+0xbb/0xc0
[ 92.792193] [<ffffffff81370d8e>] i915_gem_object_retire__read+0x1ee/0x280
[ 92.792203] [<ffffffff81372efb>] i915_gem_retire_requests_ring+0x7b/0x150
[ 92.792213] [<ffffffff813659b1>]
i915_gem_execbuffer_reserve.isra.21+0x31/0x350
[ 92.792225] [<ffffffff8136680a>]
i915_gem_do_execbuffer.isra.27+0x7aa/0x1330
[ 92.792235] [<ffffffff8137608d>] ? i915_gem_object_do_pin+0x47d/0xad0
[ 92.792245] [<ffffffff81377d6a>] ? i915_gem_pwrite_ioctl+0xda/0xb80
[ 92.792254] [<ffffffff81375ac9>] ? i915_gem_free_object+0x1f9/0x340
[ 92.792263] [<ffffffff81367f82>] i915_gem_execbuffer2+0xb2/0x240
[ 92.792274] [<ffffffff8131cac3>] drm_ioctl+0x143/0x510
[ 92.792282] [<ffffffff81367ed0>] ? i915_gem_execbuffer+0x2f0/0x2f0
[ 92.792292] [<ffffffff81099c63>] ? pick_next_task_fair+0x3d3/0x420
[ 92.792303] [<ffffffff811458b1>] ? __fput+0x161/0x1d0
[ 92.792313] [<ffffffff81155955>] do_vfs_ioctl+0x285/0x460
[ 92.792323] [<ffffffff81155b71>] SyS_ioctl+0x41/0x70
[ 92.792334] [<ffffffff810015a4>] ? prepare_exit_to_usermode+0x84/0xc0
[ 92.792345] [<ffffffff8150a997>] entry_SYSCALL_64_fastpath+0x12/0x6a</pre>
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