[Intel-gfx] [PATCH 21/21] drm/vmwgfx: Nuke preclose hook

Daniel Vetter daniel.vetter at ffwll.ch
Sat Jan 9 02:43:22 PST 2016

On Fri, Jan 8, 2016 at 9:53 PM, Thomas Hellstrom <thellstrom at vmware.com> wrote:
> On 01/08/2016 09:36 PM, Daniel Vetter wrote:
>> Again since the drm core takes care of event unlinking/disarming this
>> is now just needless code.
>> Cc: Thomas Hellström <thellstrom at vmware.com>
>> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> Hmm,
> IIRC this is actually a list of events that core drm is not aware of
> yet. They sit on this list waiting for a fence to pass and are then
> transferred to core drm....

Yes I know. Earlier patches in the series extract new core functions
to setup/tear down such events and send them out, which is what's
needed to make this trick possible. Exynos similarly uses events
similarly, and is also converted. Same for nouveau it seems, but there
the code doesn't use the reserve/send split, so I'm unclear
how/whether at all it correctly handles this race.
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch

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