Alongside DRI3, SHM fences are used to serialise changes to the Pixmap
shared between the client and the xserver. By recording the associated
Drawable for a particular fence, the driver can reduce the amount of
work required for serialisation (i.e. it only has to serialise access to
one Pixmap,
Chris Wilson ch...@chris-wilson.co.uk writes:
Alongside DRI3, SHM fences are used to serialise changes to the Pixmap
shared between the client and the xserver. By recording the associated
Drawable for a particular fence, the driver can reduce the amount of
work required for serialisation
