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    SubjectRe: [patch 3/7] mm: make page writeback obey cpuset constraints
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    On Tue, 2008-10-28 at 09:08 -0700, David Rientjes wrote:

    > +/*
    > + * Calculate the limits relative to the current cpuset
    > + *
    > + * We do not disregard highmem because all nodes (except maybe node 0) have
    > + * either all memory in HIGHMEM (32-bit) or all memory in non-HIGHMEM (64-bit).
    > + * If we would disregard highmem, then cpuset throttling would not work on
    > + * 32-bit.
    > + */
    > +int cpuset_populate_dirty_limits(struct dirty_limits *dl,
    > + unsigned long *dirtyable_memory,
    > + unsigned long *nr_mapped,
    > + const nodemask_t *nodes)
    > +{
    > + int node;
    > +
    > + if (likely(!nodes || nodes_subset(node_online_map, *nodes)))
    > + return 0;
    > + for_each_node_mask(node, *nodes) {
    > + if (!node_online(node))
    > + continue;
    > + dl->nr_dirty += node_page_state(node, NR_FILE_DIRTY);
    > + dl->nr_unstable += node_page_state(node, NR_UNSTABLE_NFS);
    > + dl->nr_writeback += node_page_state(node, NR_WRITEBACK);
    > + dirtyable_memory +=

    *dirtyable_memory perhaps?

    > + node_page_state(node, NR_ACTIVE_ANON) +
    > + node_page_state(node, NR_ACTIVE_FILE) +
    > + node_page_state(node, NR_INACTIVE_ANON) +
    > + node_page_state(node, NR_INACTIVE_FILE) +
    > + node_page_state(node, NR_FREE_PAGES);
    > + nr_mapped +=

    idem?

    > + node_page_state(node, NR_FILE_MAPPED) +
    > + node_page_state(node, NR_ANON_PAGES);
    > + }
    > + return 1;
    > +}





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