On Tue, Sep 18, 2012 at 06:04:02PM +0400, Glauber Costa wrote: > This flag is used to indicate to the callees that this allocation is a > kernel allocation in process context, and should be accounted to > current's memcg. It takes numerical place of the of the recently removed > __GFP_NO_KSWAPD. > > Signed-off-by: Glauber Costa <glommer@xxxxxxxxxxxxx> > CC: Christoph Lameter <cl@xxxxxxxxx> > CC: Pekka Enberg <penberg@xxxxxxxxxxxxxx> > CC: Michal Hocko <mhocko@xxxxxxx> > CC: Johannes Weiner <hannes@xxxxxxxxxxx> > CC: Suleiman Souhlal <suleiman@xxxxxxxxxx> > CC: Rik van Riel <riel@xxxxxxxxxx> > CC: Mel Gorman <mel@xxxxxxxxx> > Acked-by: Kamezawa Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> I agree with Christophs recommendation that this flag always exist instead of being 0 in the !MEMCG_KMEM case. If __GFP_KMEMCG ever is used in another part of the VM (which would be unexpected but still) then the behaviour might differ too much between MEMCG_KMEM and !MEMCG_KMEM cases. As unlikely as the case is, it's not impossible. For tracing __GFP_KMEMCG should have an entry in include/trace/events/gfpflags.h Get rid of the CONFIG_MEMCG_KMEM check and update include/trace/events/gfpflags.h and then feel free to stick my Acked-by on it. -- Mel Gorman SUSE Labs -- 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>