On Tue, Mar 03, 2015 at 02:45:24PM +0100, Michal Hocko wrote: > On Tue 03-03-15 06:42:01, Chen Gang wrote: > > When !MMU, it will report warning. The related warning with allmodconfig > > under c6x: > > Does it even make any sense to enable CONFIG_MEMCG when !CONFIG_MMU? > Is anybody using this configuration and is it actually usable? My > knowledge about CONFIG_MMU is close to zero so I might be missing > something but I do not see a point into fixing compile warnings when > the whole subsystem is not usable in the first place. It's very limited, and anonymous memory is not even charged right now, even though it could be -- see nommu.c::do_mmap_private(). But there is nothing inherent in the memcg functionality that would require an MMU I guess, except for these ridiculous charge moving pte walkers. > > Signed-off-by: Chen Gang <gang.chen.5i5j@xxxxxxxxx> Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx> -- 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>