On Mon, Jun 25, 2012 at 06:15:24PM +0400, 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(). Shouldn't we be documenting that in the code somewhere, preferably in the function comments? -- tejun -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>