Quoting Chris Wilson (2017-10-11 12:21:06) > Older gen use a physical address for the hardware status page, for which > we use cache-coherent writes. As the writes are into the cpu cache, we use > a normal WB mapped page to read the HWS, used for our seqno tracking. > > Anecdotally, I observed lost breadcrumbs writes into the HWS on i965gm, > which so far have not reoccurred with this patch. How reliable that > evidence is remains to be seen. > > v2: Explicitly pass the expected physical address to the hw > v3: Also remember the wild writes we once had for HWS above 4G. > > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > Cc: Daniel Vetter <daniel@xxxxxxxx> > Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx> Oops, dropped the grumpy r-b from Daniel. I was just wanting to see if this helped gdg, but I just remembered CI doesn't include gdg in BAT. Tomi, still an issue as it's reasonably stable now? -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
