Messages in this thread | | | 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 |
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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 <glommer@parallels.com> > Acked-by: Michal Hocko <mhocko@suse.cz> > Acked-by: Mel Gorman <mgorman@suse.de> > Acked-by: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> > CC: Christoph Lameter <cl@linux.com> > CC: Pekka Enberg <penberg@cs.helsinki.fi> > CC: Johannes Weiner <hannes@cmpxchg.org> > CC: Suleiman Souhlal <suleiman@google.com> > CC: Tejun Heo <tj@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
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