On Friday 19 January 2007 08:57, Chip Coldwell wrote: > But it still might be a reasonable thing to do to test the theory that > the problem is cache coherency across the graphics aperture, even if > it isn't a long-term solution for the problem.
I suspect it would disturb timing so badly that it might hide the original problem. If that is true then adding udelays might hide it too. Ok i guess you could test with a UP kernel. There change_page_attr should be much cheaper because it doesn't need to IPI to other CPUs. Also use a .2.6.20-rc* kernel that uses CLFLUSH in there, not WBINVD which is also very costly. Anyways I guess we can just wait what the hardware people figure out. -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/