On 05/19/2016 01:58 PM, Chen Feng wrote:
> While testing the kcompactd in my platform 3G MEM only DMA ZONE.
> I found the kcompactd never wakeup. It seems the zoneindex
> has already minus 1 before. So the traverse here should be <=.
Ouch, thanks!
> Signed-off-by: Chen Feng <puck.chen@xxxxxxxxxxxxx>
Fixes: 0f87baf4f7fb ("mm: wake kcompactd before kswapd's short sleep")
Cc: stable@xxxxxxxxxxxxxxx
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
> ---
> mm/compaction.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/mm/compaction.c b/mm/compaction.c
> index 8fa2540..e5122d9 100644
> --- a/mm/compaction.c
> +++ b/mm/compaction.c
> @@ -1742,7 +1742,7 @@ static bool kcompactd_node_suitable(pg_data_t *pgdat)
> struct zone *zone;
> enum zone_type classzone_idx = pgdat->kcompactd_classzone_idx;
>
> - for (zoneid = 0; zoneid < classzone_idx; zoneid++) {
> + for (zoneid = 0; zoneid <= classzone_idx; zoneid++) {
> zone = &pgdat->node_zones[zoneid];
>
> if (!populated_zone(zone))
>
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