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memcg: remove unused retry signal from reclaim 

If the memcg reclaim code detects the target memcg below its limit it
exits and returns a guaranteed non-zero value so that the charge is
retried.

Nowadays, the charge side checks the memcg limit itself and does not rely
on this non-zero return value trick.

This patch removes it.  The reclaim code will now always return the true
number of pages it reclaimed on its own.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Rik van Riel<riel@redhat.com>
Acked-by: Ying Han<yinghan@google.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Johannes Weiner 2011-05-26 16:25:35 -07:00 committed by Linus Torvalds
parent 246e87a939
commit 4fd14ebf6e
1 changed files with 1 additions and 1 deletions
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2
mm/memcontrol.c
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@ -1596,7 +1596,7 @@ static int mem_cgroup_hierarchical_reclaim(struct mem_cgroup *root_mem,
if (!res_counter_soft_limit_excess(&root_mem->res))
return total;
} else if (mem_cgroup_margin(root_mem))
return 1 + total;
return total;
}
return total;
}