On Wed, Apr 20, 2011 at 10:22:04AM -0500, Christoph Lameter wrote: > There is barely any testing going on at all of this since we have had this > issue for more than 5 years and have not noticed it. The absence of bug > reports therefore proves nothing. Code inspection of the VM shows > that this is an issue that arises in multiple subsystems and that we have > VM_BUG_ONs in the page allocator that should trigger for these situations. So ... we've proven that people using these architectures use SLAB instead of SLUB, don't enable CONFIG_DEBUG_VM and don't use hugepages (not really a surprise ... nobody's running Oracle on these arches :-) I don't think that qualifies as "barely any testing". I think that's "nobody developing the Linux MM uses one of these architectures". -- Matthew Wilcox Intel Open Source Technology Centre "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step." -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>