On Wed, 4 May 2011, Christoph Lameter wrote:
As i have explained multiple times before: This is a generic issue with a kernel configuration that has DISCONTIGMEM on and NUMA configured off. Core code in various subsystems makes various assumptions in the !NUMA case. F.e. page_to_nid(page) == 0. Slub is one of them.
Agreed, but James is still reporting that there is a slub oops with at least parisc even with the N_NORMAL_MEMORY fix applied. He's currently retrying on a clean kernel with the latest git (and presumably CONFIG_BROKEN to enable CONFIG_SLUB). If he reports that slub is no longer an issue with such a configuration, then I agree that we can remove the Kconfig change for slub so it no longer forces CONFIG_NUMA for CONFIG_DISCONTIGMEM (or CONFIG_BROKEN). If that's the case, and we'll have to wait for James' report back first, then we can probably make adjustments in the per-arch Kconfigs that enable discontigmem without NUMA and then make it a strict requirement (or CONFIG_BROKEN) until the additional problems are solved in other places in the kernel. -- To unsubscribe from this list: send the line "unsubscribe linux-m68k" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
