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    Subject[PATCH 2/3] Zone reclaim V3: Remove debris from old zone reclaim
    Remove debris of old zone reclaim

    Removes the leftovers from prior attempts to implement Zone reclaim.

    sys_set_zone_reclaim is not rechable in 2.6.14.

    The reclaim_pages field in struct zone is only used by sys_set_zone_reclaim.

    Signed-off-by: Christoph Lameter <clameter@sgi.com>

    Index: linux-2.6.15-rc4/include/linux/mmzone.h
    ===================================================================
    --- linux-2.6.15-rc4.orig/include/linux/mmzone.h 2005-11-30 22:25:15.000000000 -0800
    +++ linux-2.6.15-rc4/include/linux/mmzone.h 2005-12-08 09:35:29.000000000 -0800
    @@ -150,11 +150,6 @@ struct zone {
    unsigned long pages_scanned; /* since last reclaim */
    int all_unreclaimable; /* All pages pinned */

    - /*
    - * Does the allocator try to reclaim pages from the zone as soon
    - * as it fails a watermark_ok() in __alloc_pages?
    - */
    - int reclaim_pages;
    /* A count of how many reclaimers are scanning this zone */
    atomic_t reclaim_in_progress;

    Index: linux-2.6.15-rc4/mm/vmscan.c
    ===================================================================
    --- linux-2.6.15-rc4.orig/mm/vmscan.c 2005-12-08 09:23:59.000000000 -0800
    +++ linux-2.6.15-rc4/mm/vmscan.c 2005-12-08 09:35:29.000000000 -0800
    @@ -1402,33 +1402,3 @@ int zone_reclaim(struct zone *zone, gfp_
    }
    #endif

    -asmlinkage long sys_set_zone_reclaim(unsigned int node, unsigned int zone,
    - unsigned int state)
    -{
    - struct zone *z;
    - int i;
    -
    - if (!capable(CAP_SYS_ADMIN))
    - return -EACCES;
    -
    - if (node >= MAX_NUMNODES || !node_online(node))
    - return -EINVAL;
    -
    - /* This will break if we ever add more zones */
    - if (!(zone & (1<<ZONE_DMA|1<<ZONE_NORMAL|1<<ZONE_HIGHMEM)))
    - return -EINVAL;
    -
    - for (i = 0; i < MAX_NR_ZONES; i++) {
    - if (!(zone & 1<<i))
    - continue;
    -
    - z = &NODE_DATA(node)->node_zones[i];
    -
    - if (state)
    - z->reclaim_pages = 1;
    - else
    - z->reclaim_pages = 0;
    - }
    -
    - return 0;
    -}
    -
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