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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>
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@ -1596,7 +1596,7 @@ static int mem_cgroup_hierarchical_reclaim(struct mem_cgroup *root_mem,
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if (!res_counter_soft_limit_excess(&root_mem->res))
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return total;
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} else if (mem_cgroup_margin(root_mem))
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return 1 + total;
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return total;
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}
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return total;
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}
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