On Mon, 9 May 2022 at 14:09, Christian König <ckoenig.leichtzumerken@xxxxxxxxx> wrote: > > Hi everyone, > > re-sending this because Daniel was requesting a background why this is > useful. > > When TTM creates a buffer this object initially should not have any > backing store and there no resource object associated with it. The same > can happen when a driver requests that the backing store of an object is > destroyed without allocating a new one. > > This is really useful during initial buffer creation as well as temporary > buffers and page tables which content doesn't need to be preserved when > they are evicted. > > Currently TTM allocates dummy system resources for that because drivers > couldn't handle a NULL pointer there. Audit the drivers and then clean > up TTM to stop making those dummy allocations. > > Please review and comment, Any chance we can throw this at intel-ci? Series seems to apply to drm-tip. > Christian. > >
