Okay so certain architectures (IA64) and certain hw implementations of those arches can't handle using the optimised libc memcpy/memset routines on MMIO memory. (i.e. memory on the PCI bus, i.e. VRAM).
Results can vary from hangs/resets/mces/corrupt answers/cats living with dogs. The kernel works around this by implementing specific mem operations for those memory types. Now I'm looked at trying to fix this upstream by avoiding memcpy/memset operations in sw renderer on those arches, and replacing them with slightly dumb memset/memcpy ops (32-bit loops, then 8-byte finishing), similiar to what the kernel does. However I've just realised pixman is the place I need to do this, and pixman doesn't really have any major per-arch code in it yet (maybe I need to fix it in glibc, and convert everyone to call memcpy_io/memset_io from there or some such craziness). Suggestions/ideas? (running away might be be an option but it'll come back). Dave. _______________________________________________ xorg mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/xorg
