[Devel] Re: [PATCH 05/11] Add a __GFP_KMEMCG flag

[David Rientjes]

On Tue, 26 Jun 2012, Glauber Costa wrote:

> > > >This flag is used to indicate to the callees that this allocation will be
> > > >serviced to the kernel. It is not supposed to be passed by the callers
> > > >of kmem_cache_alloc, but rather by the cache core itself.
> > > >
> > Not sure what "serviced to the kernel" means, does this mean that the
> > memory will not be accounted for to the root memcg?
> > 
> In this context, it means that is a kernel allocation, not a userspace one
> (but in process context, of course), *and* it is to be accounted a
> specific memcg.
> 

Ah, that makes sense.  I think it would help if this was included in the 
changelog as well as a specifying that it is accounted to current's memcg 
at the time of the allocation in a comment in the code.