b0b3159abd
For tracking the MSC when the present can be executed separately from the target MSC. Allows removing the requeue field instead, plus more later. v2: * Rename wait_msc → exec_msc (Roman Gilg) * Use exec_msc = target_msc instead of exec_msc++, for clarity. * Bug fix: Set exec_msc = target_msc also if present_flip returned false in present_execute. v3: * Set exec_msc = target_msc also if present_wnmd_flip returned false in present_wnmd_execute, for consistency. v4: * Specifically check for exec_msc == crtc_msc + 1 in present_execute_wait/copy, to avoid re-introducing https://bugs.freedesktop.org/show_bug.cgi?id=94596 . Reviewed-by: Roman Gilg <subdiff@gmail.com> Tested-by: Roman Gilg <subdiff@gmail.com>
X Server
The X server accepts requests from client applications to create windows, which are (normally rectangular) "virtual screens" that the client program can draw into.
Windows are then composed on the actual screen by the X server (or by a separate composite manager) as directed by the window manager, which usually communicates with the user via graphical controls such as buttons and draggable titlebars and borders.
For a comprehensive overview of X Server and X Window System, consult the following article: https://en.wikipedia.org/wiki/X_server
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