On Mon, Jun 09, 2014 at 11:26:20AM +0200, Vlastimil Babka wrote:
> From: David Rientjes <rientjes@xxxxxxxxxx>
>
> struct compact_control currently converts the gfp mask to a migratetype, but we
> need the entire gfp mask in a follow-up patch.
>
> Pass the entire gfp mask as part of struct compact_control.
>
> Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx>
> Signed-off-by: Vlastimil Babka <vbabka@xxxxxxx>
> Cc: Minchan Kim <minchan@xxxxxxxxxx>
> Cc: Mel Gorman <mgorman@xxxxxxx>
> Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
> Cc: Michal Nazarewicz <mina86@xxxxxxxxxx>
> Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
> Cc: Christoph Lameter <cl@xxxxxxxxx>
> Cc: Rik van Riel <riel@xxxxxxxxxx>
> ---
> mm/compaction.c | 12 +++++++-----
> mm/internal.h | 2 +-
> 2 files changed, 8 insertions(+), 6 deletions(-)
>
> diff --git a/mm/compaction.c b/mm/compaction.c
> index c339ccd..d1e30ba 100644
> --- a/mm/compaction.c
> +++ b/mm/compaction.c
> @@ -965,8 +965,8 @@ static isolate_migrate_t isolate_migratepages(struct zone *zone,
> return ISOLATE_SUCCESS;
> }
>
> -static int compact_finished(struct zone *zone,
> - struct compact_control *cc)
> +static int compact_finished(struct zone *zone, struct compact_control *cc,
> + const int migratetype)
If we has gfp_mask, we could use gfpflags_to_migratetype from cc->gfp_mask.
What's is your intention?
> {
> unsigned int order;
> unsigned long watermark;
> @@ -1012,7 +1012,7 @@ static int compact_finished(struct zone *zone,
> struct free_area *area = &zone->free_area[order];
>
> /* Job done if page is free of the right migratetype */
> - if (!list_empty(&area->free_list[cc->migratetype]))
> + if (!list_empty(&area->free_list[migratetype]))
> return COMPACT_PARTIAL;
>
> /* Job done if allocation would set block type */
> @@ -1078,6 +1078,7 @@ static int compact_zone(struct zone *zone, struct compact_control *cc)
> int ret;
> unsigned long start_pfn = zone->zone_start_pfn;
> unsigned long end_pfn = zone_end_pfn(zone);
> + const int migratetype = gfpflags_to_migratetype(cc->gfp_mask);
> const bool sync = cc->mode != MIGRATE_ASYNC;
>
> ret = compaction_suitable(zone, cc->order);
> @@ -1120,7 +1121,8 @@ static int compact_zone(struct zone *zone, struct compact_control *cc)
>
> migrate_prep_local();
>
> - while ((ret = compact_finished(zone, cc)) == COMPACT_CONTINUE) {
> + while ((ret = compact_finished(zone, cc, migratetype)) ==
> + COMPACT_CONTINUE) {
> int err;
>
> switch (isolate_migratepages(zone, cc)) {
> @@ -1178,7 +1180,7 @@ static unsigned long compact_zone_order(struct zone *zone, int order,
> .nr_freepages = 0,
> .nr_migratepages = 0,
> .order = order,
> - .migratetype = gfpflags_to_migratetype(gfp_mask),
> + .gfp_mask = gfp_mask,
> .zone = zone,
> .mode = mode,
> };
> diff --git a/mm/internal.h b/mm/internal.h
> index 584d04f..af15461 100644
> --- a/mm/internal.h
> +++ b/mm/internal.h
> @@ -149,7 +149,7 @@ struct compact_control {
> bool finished_update_migrate;
>
> int order; /* order a direct compactor needs */
> - int migratetype; /* MOVABLE, RECLAIMABLE etc */
> + const gfp_t gfp_mask; /* gfp mask of a direct compactor */
> struct zone *zone;
> enum compact_contended contended; /* Signal need_sched() or lock
> * contention detected during
> --
> 1.8.4.5
>
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--
Kind regards,
Minchan Kim
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