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    Subject[PATCH v3 01/11] mm/page_alloc: factor out setting of pcp->high and pcp->batch.
    Date
    Creates pageset_set_batch() for use in setup_pageset().
    pageset_set_batch() imitates the functionality of
    setup_pagelist_highmark(), but uses the boot time
    (percpu_pagelist_fraction == 0) calculations for determining ->high
    based on ->batch.

    Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
    ---
    mm/page_alloc.c | 12 +++++++++---
    1 file changed, 9 insertions(+), 3 deletions(-)

    diff --git a/mm/page_alloc.c b/mm/page_alloc.c
    index 8fcced7..5877cf0 100644
    --- a/mm/page_alloc.c
    +++ b/mm/page_alloc.c
    @@ -4004,6 +4004,14 @@ static int __meminit zone_batchsize(struct zone *zone)
    #endif
    }

    +/* a companion to setup_pagelist_highmark() */
    +static void pageset_set_batch(struct per_cpu_pageset *p, unsigned long batch)
    +{
    + struct per_cpu_pages *pcp = &p->pcp;
    + pcp->high = 6 * batch;
    + pcp->batch = max(1UL, 1 * batch);
    +}
    +
    static void setup_pageset(struct per_cpu_pageset *p, unsigned long batch)
    {
    struct per_cpu_pages *pcp;
    @@ -4013,8 +4021,7 @@ static void setup_pageset(struct per_cpu_pageset *p, unsigned long batch)

    pcp = &p->pcp;
    pcp->count = 0;
    - pcp->high = 6 * batch;
    - pcp->batch = max(1UL, 1 * batch);
    + pageset_set_batch(p, batch);
    for (migratetype = 0; migratetype < MIGRATE_PCPTYPES; migratetype++)
    INIT_LIST_HEAD(&pcp->lists[migratetype]);
    }
    @@ -4023,7 +4030,6 @@ static void setup_pageset(struct per_cpu_pageset *p, unsigned long batch)
    * setup_pagelist_highmark() sets the high water mark for hot per_cpu_pagelist
    * to the value high for the pageset p.
    */
    -
    static void setup_pagelist_highmark(struct per_cpu_pageset *p,
    unsigned long high)
    {
    --
    1.8.2.1


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