4.9-stable review patch. If anyone has any objections, please let me know.
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From: Johannes Weiner hannes@cmpxchg.org
commit 047d72c30eedcb953222810f1e7dcaae663aa452 upstream.
Commit 1d82de618ddd ("mm, vmscan: make kswapd reclaim in terms of nodes") allowed laptop_mode=1 to start writing not just when the priority drops to DEF_PRIORITY - 2 but also when the node is unreclaimable.
That appears to be a spurious change in this patch as I doubt the series was tested with laptop_mode, and neither is that particular change mentioned in the changelog. Remove it, it's still recent.
Link: http://lkml.kernel.org/r/20170228214007.5621-4-hannes@cmpxchg.org Signed-off-by: Johannes Weiner hannes@cmpxchg.org Acked-by: Hillf Danton hillf.zj@alibaba-inc.com Acked-by: Mel Gorman mgorman@techsingularity.net Acked-by: Michal Hocko mhocko@suse.com Cc: Jia He hejianet@gmail.com Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Amit Pundir amit.pundir@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- mm/vmscan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -3301,7 +3301,7 @@ static int balance_pgdat(pg_data_t *pgda * If we're getting trouble reclaiming, start doing writepage * even in laptop mode. */ - if (sc.priority < DEF_PRIORITY - 2 || !pgdat_reclaimable(pgdat)) + if (sc.priority < DEF_PRIORITY - 2) sc.may_writepage = 1;
/* Call soft limit reclaim before calling shrink_node. */