On Thu, 2 Aug 2007, Mel Gorman wrote:
> +#ifdef CONFIG_NUMA
> +/*
> + * Only custom zonelists like MPOL_BIND need to be filtered as part of
> + * policies. As described in the comment for struct zonelist_cache, these
> + * zonelists will not have a zlcache so zlcache_ptr will not be set. Use
> + * that to determine if the zonelists needs to be filtered or not.
> + */
> +static inline int alloc_should_filter_zonelist(struct zonelist *zonelist)
> +{
> + return !zonelist->zlcache_ptr;
> +}
I guess Paul needs to have a look at this one.
Otherwise
Acked-by: Christoph Lameter <[email protected]>
> @@ -1166,6 +1167,18 @@ zonelist_scan:
> z = zonelist->zones;
>
> do {
> + /*
> + * In NUMA, this could be a policy zonelist which contains
> + * zones that may not be allowed by the current gfp_mask.
> + * Check the zone is allowed by the current flags
> + */
> + if (unlikely(alloc_should_filter_zonelist(zonelist))) {
> + if (highest_zoneidx == -1)
> + highest_zoneidx = gfp_zone(gfp_mask);
> + if (zone_idx(*z) > highest_zoneidx)
> + continue;
> + }
> +
> if (NUMA_BUILD && zlc_active &&
Hotpath. Sigh.
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