> I've yet to see a user who wants WC. Lets face it, WC *sucks*. This is why
Interesting. > the folks who care about performance (the graphics guys) stopped using it. I didn't know this. What do they do instead? I understand that WC was added originally because AGP was really slow at IO towards the CPU. You mean on PCI-E it is fast enough now that standard cached WB works well enough? > WC is slow, and on modern cpus leads to really bad performance. I'm really > half tempted to just ignore WC entirely and suggest that we don't even > implement > it in the kernel. Yes it's really that bad. At least the X server still uses it. In fact there are already some performance regression regarding this from differing kernel behavioun in the sysfs interfaces vs /dev/mem. What would you recommend should the X server use instead? Always map standard WB? How about on older AGP systems? -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/