Quoting Chris Wilson (2018-05-11 13:11:47) > The original switch to use CSB from the HWSP was plagued by the effort
s/effort/effect/ > of read ordering on VT-d; we would read the WRITE pointer from the HWSP > before it had completed writing the CSB contents. The mystery comes down > to the lack of rmb() for correct ordering with respect to the writes > from HW, and with that resolved we can remove the VT-d special casing. -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
