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Message-Id: <20151113.110014.733581317119133610.davem@davemloft.net> Date: Fri, 13 Nov 2015 11:00:14 -0500 (EST) From: David Miller <davem@...emloft.net> To: hannes@...xchg.org Cc: akpm@...ux-foundation.org, vdavydov@...tuozzo.com, tj@...nel.org, mhocko@...e.cz, netdev@...r.kernel.org, linux-mm@...ck.org, cgroups@...r.kernel.org, linux-kernel@...r.kernel.org, kernel-team@...com Subject: Re: [PATCH 03/14] net: tcp_memcontrol: properly detect ancestor socket pressure From: Johannes Weiner <hannes@...xchg.org> Date: Thu, 12 Nov 2015 18:41:22 -0500 > When charging socket memory, the code currently checks only the local > page counter for excess to determine whether the memcg is under socket > pressure. But even if the local counter is fine, one of the ancestors > could have breached its limit, which should also force this child to > enter socket pressure. This currently doesn't happen. > > Fix this by using page_counter_try_charge() first. If that fails, it > means that either the local counter or one of the ancestors are in > excess of their limit, and the child should enter socket pressure. > > Signed-off-by: Johannes Weiner <hannes@...xchg.org> Acked-by: David S. Miller <davem@...emloft.net> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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