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<body><span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [CI][DRMTIP]igt@gem_vm_create@isolation - incomplete/dmesg-warn - WARN_ON(debug_locks && !lock_is_held(&(&vma->vm->i915->drm.struct_mutex)->dep_map))"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110934">bug 110934</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
</tr>
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
</td>
</tr></table>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [CI][DRMTIP]igt@gem_vm_create@isolation - incomplete/dmesg-warn - WARN_ON(debug_locks && !lock_is_held(&(&vma->vm->i915->drm.struct_mutex)->dep_map))"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110934#c4">Comment # 4</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [CI][DRMTIP]igt@gem_vm_create@isolation - incomplete/dmesg-warn - WARN_ON(debug_locks && !lock_is_held(&(&vma->vm->i915->drm.struct_mutex)->dep_map))"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110934">bug 110934</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>commit b32fa811156328aea5a3c2ff05cc096490382456 (HEAD -> drm-intel-next-queued,
drm-intel/for-linux-next, drm-intel/drm-intel-next-queued)
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Thu Jun 20 19:37:05 2019 +0100
drm/i915/gtt: Defer address space cleanup to an RCU worker
Enable RCU protection of i915_address_space and its ppgtt superclasses,
and defer its cleanup into a worker executed after an RCU grace period.
In the future we will be able to use the RCU protection to reduce the
locking around VM lookups, but the immediate benefit is being able to
defer the release into a kworker (process context). This is required as
we may need to sleep to reap the WC pages stashed away inside the ppgtt.
Bugzilla: <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [CI][DRMTIP]igt@gem_vm_create@isolation - incomplete/dmesg-warn - WARN_ON(debug_locks && !lock_is_held(&(&vma->vm->i915->drm.struct_mutex)->dep_map))"
href="show_bug.cgi?id=110934">https://bugs.freedesktop.org/show_bug.cgi?id=110934</a>
Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Reviewed-by: Tvrtko Ursulin <<a href="mailto:tvrtko.ursulin@intel.com">tvrtko.ursulin@intel.com</a>>
Link:
<a href="https://patchwork.freedesktop.org/patch/msgid/20190620183705.31006-1-chris@chris-wilson.co.uk">https://patchwork.freedesktop.org/patch/msgid/20190620183705.31006-1-chris@chris-wilson.co.uk</a></pre>
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