On Fri, Dec 5, 2008 at 1:01 PM, Dave Airlie <[EMAIL PROTECTED]> wrote: > 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).
I decided it was probably a kernel/glibc issue (maybe) so I've pushed it there to see what comes back. Dave. > > Dave. > _______________________________________________ xorg mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/xorg
