(To Vladimir can you comment on memcg?)
On Mon, 7 Dec 2015 08:59:25 -0600 (CST) Christoph Lameter <cl@xxxxxxxxx> wrote:
> On Mon, 7 Dec 2015, Jesper Dangaard Brouer wrote:
>
> > > > +
> > > > + local_irq_disable();
> > > > + for (i = 0; i < size; i++) {
> > > > + void *objp = p[i];
> > > > +
> > > > + s = cache_from_obj(orig_s, objp);
> > >
> > > Does this support freeing objects from a set of different caches?
> >
> > This is for supporting memcg (CONFIG_MEMCG_KMEM).
> >
> > Quoting from commit 033745189b1b ("slub: add missing kmem cgroup
> > support to kmem_cache_free_bulk"):
> >
> > Incoming bulk free objects can belong to different kmem cgroups, and
> > object free call can happen at a later point outside memcg context. Thus,
> > we need to keep the orig kmem_cache, to correctly verify if a memcg object
> > match against its "root_cache" (s->memcg_params.root_cache).
>
> Where is that verification? This looks like SLAB would support freeing
> objects from different caches.
This is for supporting CONFIG_MEMCG_KMEM, thus I would like Vladimir
input on this, as I don't know enough about memcg....
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Principal Kernel Engineer at Red Hat
Author of http://www.iptv-analyzer.org
LinkedIn: http://www.linkedin.com/in/brouer
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