Messages in this thread Patch in this message |  | | From | Mel Gorman <> | Subject | [PATCH 16/25] mm, vmscan: Update classzone_idx if buffer_heads_over_limit | Date | Mon, 8 Jun 2015 14:56:22 +0100 |
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If buffer heads are over the limit then the direct reclaim gfp_mask is promoted to __GFP_HIGHMEM so that lowmem is indirectly freed. With node-based reclaim, it is also required that the classzone_idx be updated or the pages will be skipped.
Signed-off-by: Mel Gorman <mgorman@suse.de> --- mm/vmscan.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c index 2a3050d7dc95..140aeefdebe1 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -2497,8 +2497,10 @@ static bool shrink_zones(struct zonelist *zonelist, struct scan_control *sc, * highmem pages could be pinning lowmem pages storing buffer_heads */ orig_mask = sc->gfp_mask; - if (buffer_heads_over_limit) + if (buffer_heads_over_limit) { sc->gfp_mask |= __GFP_HIGHMEM; + classzone_idx = gfp_zone(sc->gfp_mask); + } for_each_zone_zonelist_nodemask(zone, z, zonelist, classzone_idx, sc->nodemask) { -- 2.3.5
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