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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Leaks buffer when closing wayland window"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108996">108996</a>
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<th>Summary</th>
<td>Leaks buffer when closing wayland window
</td>
</tr>
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<th>Product</th>
<td>Mesa
</td>
</tr>
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<th>Version</th>
<td>git
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>EGL/Wayland
</td>
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<th>Assignee</th>
<td>wayland-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>sjoerd@luon.net
</td>
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<th>QA Contact</th>
<td>mesa-dev@lists.freedesktop.org
</td>
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<pre>Hey,
When closing a EGL using window on wayland it seems there is always a (color)
buffer leaked until the process exits; We first noticed this with Qt using apps
on an etnaviv based system, however the same can be reproduce on Intel gpu's
To reproduce I created a modified weston-simple-egl[0] which simply every 60
frames will destroy the current surface and create a new one[1].
As mentioned the issue both occurs on both etnaviv and intel systems where
there is seemingly one dmabuf leaked every time the window gets closed (as per
/sys/kernel/debug/dma_buf/bufinfo). It can also be reproduce by using software
rendering (LIBGL_ALWAYS_SOFTWARE=1) in which case memory grows every time the
window is recreated (presumably for the same reason).
While tracing it down as far as i could it seems that the `current` buffer of
the relevant dri2_egl_surface has extra references on it when ->destroyImage
gets called on match color_buffer in `dri2_wl_destroy_surface` (while the other
allocated buffers/driImages don't). Why these extra references (presumably for
the next render?) aren't cleared up is unfortunately a bit beyond my
understanding of mesa.
This is reproducable both with mesa 18.2.6 and git master
[0] <a href="https://gitlab.freedesktop.org/sjoerd/weston/tree/mesa-leak">https://gitlab.freedesktop.org/sjoerd/weston/tree/mesa-leak</a>
[1]
<a href="https://gitlab.freedesktop.org/sjoerd/weston/commit/934e195c1b4d5fdd7ec006c8f7048ad30df8738f">https://gitlab.freedesktop.org/sjoerd/weston/commit/934e195c1b4d5fdd7ec006c8f7048ad30df8738f</a></pre>
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</p>
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