> Why do the two pages have to be physically contiguous? The stack just > needs to be two contiguous pages in virtual memory, but they can map to > any two pages anywhere in physical memory.
Historically we allowed DMA off the stack on old x86 systems. Removing that while a good idea would take a lot of auditing. We also have a very limited vmalloc window for mapped pages and filling that with stacks would be bad. - 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/
