<div dir="ltr"><div dir="ltr">Hi,</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, 20 Apr 2021 at 20:30, Daniel Vetter <<a href="mailto:daniel@ffwll.ch">daniel@ffwll.ch</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">The thing is, you can't do this in drm/scheduler. At least not without<br>
splitting up the dma_fence in the kernel into separate memory fences<br>
and sync fences</blockquote><div> </div><div><span style="">I'm starting to think this thread needs its own glossary ...</span></div><div><span style=""><br></span></div><div><span style="">I propose we use 'residency fence' for execution fences which enact memory-residency operations, e.g. faulting in a page ultimately depending on GPU work retiring.</span></div><div><span style=""><br></span></div><div><span style="">And 'value fence' for the pure-userspace model suggested by timeline semaphores, i.e. fences being (*addr == val) rather than being able to look at ctx seqno.</span></div><div><span style=""><br></span></div><div><span style="">Cheers,</span></div><div><span style="">Daniel</span></div></div></div>