Re: [Mesa3d-dev] gallium cached bufmgr busy change

[Luca B. <luc...@gm...>]

Do Radeons have a CP command to write an arbitrary value to some place
in memory?

If so, you may want to use that to implement userspace-accessible
fencing in the obvious way and then use the fenced bufmgr, which would
do that with no pipebuffer changes and no kernel calls.

Otherwise, maybe change the kernel module to write a fence number in
an mmapable place on fence irqs?