diff options
| author | Dongwon Kim | 2022-10-21 21:23:15 +0200 |
|---|---|---|
| committer | Gerd Hoffmann | 2022-11-23 12:27:55 +0100 |
| commit | 64f1359bd08060ffe7a5689fdcbaeec6d8a59980 (patch) | |
| tree | 75ee2c1467ceddc05c35d4fba601ca40e61b42a9 | |
| parent | hw/usb/hcd-xhci.c: spelling: tranfer (diff) | |
| download | qemu-64f1359bd08060ffe7a5689fdcbaeec6d8a59980.tar.gz qemu-64f1359bd08060ffe7a5689fdcbaeec6d8a59980.tar.xz qemu-64f1359bd08060ffe7a5689fdcbaeec6d8a59980.zip | |
ui/gtk: prevent ui lock up when dpy_gl_update called again before current draw event occurs
A warning, "qemu: warning: console: no gl-unblock within" followed by
guest scanout lockup can happen if dpy_gl_update is called in a row
and the second call is made before gd_draw_event scheduled by the first
call is taking place. This is because draw call returns without decrementing
gl_block ref count if the dmabuf was already submitted as shown below.
(gd_gl_area_draw/gd_egl_draw)
if (dmabuf) {
if (!dmabuf->draw_submitted) {
return;
} else {
dmabuf->draw_submitted = false;
}
}
So it should not schedule any redundant draw event in case draw_submitted is
already set in gd_egl_fluch/gd_gl_area_scanout_flush.
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Vivek Kasireddy <vivek.kasireddy@intel.com>
Signed-off-by: Dongwon Kim <dongwon.kim@intel.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20221021192315.9110-1-dongwon.kim@intel.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
| -rw-r--r-- | ui/gtk-egl.c | 2 | ||||
| -rw-r--r-- | ui/gtk-gl-area.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/ui/gtk-egl.c b/ui/gtk-egl.c index 35f917ceb1..e84431790c 100644 --- a/ui/gtk-egl.c +++ b/ui/gtk-egl.c @@ -341,7 +341,7 @@ void gd_egl_flush(DisplayChangeListener *dcl, VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl); GtkWidget *area = vc->gfx.drawing_area; - if (vc->gfx.guest_fb.dmabuf) { + if (vc->gfx.guest_fb.dmabuf && !vc->gfx.guest_fb.dmabuf->draw_submitted) { graphic_hw_gl_block(vc->gfx.dcl.con, true); vc->gfx.guest_fb.dmabuf->draw_submitted = true; gtk_widget_queue_draw_area(area, x, y, w, h); diff --git a/ui/gtk-gl-area.c b/ui/gtk-gl-area.c index 682638a197..7696df1f6b 100644 --- a/ui/gtk-gl-area.c +++ b/ui/gtk-gl-area.c @@ -278,7 +278,7 @@ void gd_gl_area_scanout_flush(DisplayChangeListener *dcl, { VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl); - if (vc->gfx.guest_fb.dmabuf) { + if (vc->gfx.guest_fb.dmabuf && !vc->gfx.guest_fb.dmabuf->draw_submitted) { graphic_hw_gl_block(vc->gfx.dcl.con, true); vc->gfx.guest_fb.dmabuf->draw_submitted = true; } |