6cd32859d0
Similar to what was done for Wayland in58f90fd03f: the glthread unmarhsal thread needs to be idle to avoid concurrent calls to get_back_bo. Also the existing code flushed after setting dri2_surf->back to NULL so a new back buffer was always allocated by the glthread flush: |---------------> dri2_drm_swap_buffers | get_back_bo (back=0x55eb93c6c488) > # First get_back_bo call | get_back_bo (back=0x55eb93c6c488 age: 0)< | # dri2_surf->back = NULL |-----> FLUSH | get_back_bo (back=nil) > # Another get_back_bo call | get_back_bo (back=0x55eb93c6c4c8 age: 3)< |-----< FLUSH |---------------< dri2_drm_swap_buffers Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/10437 Cc: mesa-stable Reviewed-by: Marek Olšák <marek.olsak@amd.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27143> (cherry picked from commit6f47e87a60)
`Mesa <https://mesa3d.org>`_ - The 3D Graphics Library ====================================================== Source ------ This repository lives at https://gitlab.freedesktop.org/mesa/mesa. Other repositories are likely forks, and code found there is not supported. Build & install --------------- You can find more information in our documentation (`docs/install.rst <https://mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.rst <https://mesa3d.org/meson.html>`_): .. code-block:: sh $ mkdir build $ cd build $ meson .. $ sudo ninja install Support ------- Many Mesa devs hang on IRC; if you're not sure which channel is appropriate, you should ask your question on `OFTC's #dri-devel <irc://irc.oftc.net/dri-devel>`_, someone will redirect you if necessary. Remember that not everyone is in the same timezone as you, so it might take a while before someone qualified sees your question. To figure out who you're talking to, or which nick to ping for your question, check out `Who's Who on IRC <https://dri.freedesktop.org/wiki/WhosWho/>`_. The next best option is to ask your question in an email to the mailing lists: `mesa-dev\@lists.freedesktop.org <https://lists.freedesktop.org/mailman/listinfo/mesa-dev>`_ Bug reports ----------- If you think something isn't working properly, please file a bug report (`docs/bugs.rst <https://mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.rst <https://mesa3d.org/submittingpatches.html>`_). Note that Mesa uses gitlab for patches submission, review and discussions.