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    Subject[PATCH 17/21] swap_prefetch: Conversion of nr_writeback to ZVC
    Subject: swap_prefetch: conversion of nr_writeback to per zone counter
    From: Christoph Lameter <clameter@sgi.com>

    Conversion of nr_writeback to per zone counter

    Signed-off-by: Christoph Lameter <clameter@sgi.com>
    Signed-off-by: Andrew Morton <akpm@osdl.org>

    Index: linux-2.6.17-rc6-cl/mm/swap_prefetch.c
    ===================================================================
    --- linux-2.6.17-rc6-cl.orig/mm/swap_prefetch.c 2006-06-10 15:09:12.691768066 -0700
    +++ linux-2.6.17-rc6-cl/mm/swap_prefetch.c 2006-06-10 15:18:17.095560797 -0700
    @@ -381,7 +381,7 @@ static int prefetch_suitable(void)
    get_page_state_node(&ps, node);

    /* We shouldn't prefetch when we are doing writeback */
    - if (ps.nr_writeback) {
    + if (node_page_state(node, NR_WRITEBACK)) {
    node_clear(node, sp_stat.prefetch_nodes);
    continue;
    }
    -
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