KAMEZAWA Hiroyuki <[email protected]> wrote:
>
> This patch makes for_each_pgdat() use node_online_map.
>
> Now, online nodes are managed by node_online_map. But
> for_each_pgdat() uses pgdat_link to traverse all nodes(pgdat).
> This means management structure is duplicated.
>
> I think using node_online_map for for_each_pgdat() is simple and
> sane implementation rather than pgdat_link.
We have a bit of a mess here.
for_each_pgdat() iterates over online nodes.
for_each_cpu() iterates over possible CPUs.
It's confusing and asymmetric. If you have time, it would be nice to later
remove for_each_pgdat() and for_each_cpu() from the kernel altogether, use
for_each_online_cpu(), for_each_possible_cpu(), for_each_online_node(),
for_each_possible_node().
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