[Devel] Re: [PATCH v3 01/13] memcg: Make it possible to use the stock for more than one page.

[Johannes Weiner]

On Tue, Sep 18, 2012 at 06:03:58PM +0400, Glauber Costa wrote:
> From: Suleiman Souhlal <ssouhlal at FreeBSD.org>
> 
> We currently have a percpu stock cache scheme that charges one page at a
> time from memcg->res, the user counter. When the kernel memory
> controller comes into play, we'll need to charge more than that.
> 
> This is because kernel memory allocations will also draw from the user
> counter, and can be bigger than a single page, as it is the case with
> the stack (usually 2 pages) or some higher order slabs.
> 
> [ glommer at parallels.com: added a changelog ]
> 
> Signed-off-by: Suleiman Souhlal <suleiman at google.com>
> Signed-off-by: Glauber Costa <glommer at parallels.com>
> Acked-by: David Rientjes <rientjes at google.com>
> Acked-by: Kamezawa Hiroyuki <kamezawa.hiroyu at jp.fujitsu.com>
> Acked-by: Michal Hocko <mhocko at suse.cz>

Independent of how the per-subtree enable-through-setting-limit
discussion pans out, we're going to need the charge cache, so:

Acked-by: Johannes Weiner <hannes at cmpxchg.org>