On Thu, 29 May 2014, Andrew Morton wrote: > > > > if (!nodemask && gfp_zone(gfp_mask) < policy_zone) > > nodemask = &node_states[N_ONLINE]; > > OK, thanks, I made the patch go away for now. > And another issue is that the policy_zone may be highmem on 32 bit platforms which will result in ZONE_NORMAL to be exempted. policy zone can actually even be ZONE_DMA for some platforms. The check would not be useful at all on those. Ignoring the containing cpuset only makes sense for GFP_DMA32 on 64 bit platforms and for GFP_DMA on platforms where there is an actual difference in the address spaces supported by GFP_DMA (such as x86). Generally I think this is only useful for platforms that attempt to support legacy devices only able to DMA to a portion of the memory address space and that at the same time support NUMA for large address spaces. This is a contradiction on the one hand this is a high end system and on the other hand it attempts to support crippled DMA devices? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>