[Intel-gfx] [PATCH] drm/i915: Reinstate order of operations in {intel, logical}_ring_begin()

[Chris Wilson]

On Mon, Jun 15, 2015 at 07:11:37PM +0100, Dave Gordon wrote:
> > It still applies. If you submit say 1024 interrupted execbuffers they
> 
> What is an interrupted execbuffer? AFAICT we hold the struct_mutex while
> stuffing the ringbuffer so we can only ever be in the process of adding
> instructions to one ringbuffer at a time, and we don't (now) interleave
> any flip commands (execlists mode requires mmio flip). Is there still
> something that just adds random stuff to someone else's OLR?

Write commands to stream, fail to add the request because the wait for
ring space fails due to a pending signals. Repeat until the entire ring
is filled by a single pending request.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre