On Mon, 20 Jan 2014, Wanpeng Li wrote:

> >+       enum zone_type high_zoneidx = gfp_zone(flags);
> >
> >+       if (!node_present_pages(searchnode)) {
> >+               zonelist = node_zonelist(searchnode, flags);
> >+               for_each_zone_zonelist(zone, z, zonelist, high_zoneidx) {
> >+                       searchnode = zone_to_nid(zone);
> >+                       if (node_present_pages(searchnode))
> >+                               break;
> >+               }
> >+       }
> >        object = get_partial_node(s, get_node(s, searchnode), c, flags);
> >        if (object || node != NUMA_NO_NODE)
> >                return object;
> >
>
> The patch fix the bug. However, the kernel crashed very quickly after running
> stress tests for a short while:

This is not a good way of fixing it. How about not asking for memory from
nodes that are memoryless? Use numa_mem_id() which gives you the next node
that has memory instead of numa_node_id() (gives you the current node
regardless if it has memory or not).