Naoya Horiguchi <n-horigu...@ah.jp.nec.com> writes:
>> >> Considering that we have architectures that won't support migrating >> explicit hugepages with this patch series, is it ok to use >> GFP_HIGHUSER_MOVABLE for hugepage allocation ? > > Originally this parameter was introduced to make hugepage pool on > ZONE_MOVABLE. > The benefit is that we can extend the hugepage pool more easily, > because external fragmentation less likely happens than other zone type > by rearranging fragmented pages with page migration/reclaim. > > So I think using ZONE_MOVABLE for hugepage allocation by default makes sense > even on the architectures which don't support hugepage migration. But allocating hugepages from ZONE_MOVABLE means we have pages in that zone which we can't migrate. Doesn't that impact other features like hotplug ? -aneesh -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
