From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx183.postini.com [74.125.245.183]) by kanga.kvack.org (Postfix) with SMTP id 042F36B002B for ; Wed, 17 Oct 2012 18:43:26 -0400 (EDT) Received: by mail-pa0-f41.google.com with SMTP id fa10so8669917pad.14 for ; Wed, 17 Oct 2012 15:43:26 -0700 (PDT) Date: Wed, 17 Oct 2012 15:43:23 -0700 (PDT) From: David Rientjes Subject: Re: [PATCH v5 07/14] mm: Allocate kernel pages to the right memcg In-Reply-To: <1350382611-20579-8-git-send-email-glommer@parallels.com> Message-ID: References: <1350382611-20579-1-git-send-email-glommer@parallels.com> <1350382611-20579-8-git-send-email-glommer@parallels.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Glauber Costa Cc: linux-mm@kvack.org, cgroups@vger.kernel.org, Mel Gorman , Tejun Heo , Andrew Morton , Michal Hocko , Johannes Weiner , kamezawa.hiroyu@jp.fujitsu.com, Christoph Lameter , Pekka Enberg , devel@openvz.org, linux-kernel@vger.kernel.org, Pekka Enberg , Suleiman Souhlal On Tue, 16 Oct 2012, Glauber Costa wrote: > When a process tries to allocate a page with the __GFP_KMEMCG flag, the > page allocator will call the corresponding memcg functions to validate > the allocation. Tasks in the root memcg can always proceed. > > To avoid adding markers to the page - and a kmem flag that would > necessarily follow, as much as doing page_cgroup lookups for no reason, > whoever is marking its allocations with __GFP_KMEMCG flag is responsible > for telling the page allocator that this is such an allocation at > free_pages() time. This is done by the invocation of > __free_accounted_pages() and free_accounted_pages(). > > [ v2: inverted test order to avoid a memcg_get leak, > free_accounted_pages simplification ] > [ v4: test for TIF_MEMDIE at newpage_charge ] > > Signed-off-by: Glauber Costa > Acked-by: Michal Hocko > Acked-by: Mel Gorman > Acked-by: Kamezawa Hiroyuki > CC: Christoph Lameter > CC: Pekka Enberg > CC: Johannes Weiner > CC: Suleiman Souhlal > CC: Tejun Heo Acked-by: David Rientjes -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org