Messages in this thread | | | Subject | Re: [PATCH 20/27] mm, vmscan: Update classzone_idx if buffer_heads_over_limit | From | Vlastimil Babka <> | Date | Fri, 17 Jun 2016 10:53:36 +0200 |
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On 06/09/2016 08:04 PM, Mel Gorman wrote: > 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@techsingularity.net>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
> --- > mm/vmscan.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/mm/vmscan.c b/mm/vmscan.c > index 3edf941e9965..7a2d69612231 100644 > --- a/mm/vmscan.c > +++ b/mm/vmscan.c > @@ -2547,8 +2547,10 @@ static void 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, > gfp_zone(sc->gfp_mask), sc->nodemask) { >
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