On Tue, 16 Jun 2015 16:23:28 +0900
Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> wrote:
> On Mon, Jun 15, 2015 at 05:52:56PM +0200, Jesper Dangaard Brouer wrote:
> > This implements SLUB specific kmem_cache_free_bulk(). SLUB allocator
> > now both have bulk alloc and free implemented.
> >
> > Play nice and reenable local IRQs while calling slowpath.
> >
> > Signed-off-by: Jesper Dangaard Brouer <brouer@xxxxxxxxxx>
> > ---
> > mm/slub.c | 32 +++++++++++++++++++++++++++++++-
> > 1 file changed, 31 insertions(+), 1 deletion(-)
> >
> > diff --git a/mm/slub.c b/mm/slub.c
> > index 98d0e6f73ec1..cc4f870677bb 100644
> > --- a/mm/slub.c
> > +++ b/mm/slub.c
> > @@ -2752,7 +2752,37 @@ EXPORT_SYMBOL(kmem_cache_free);
> >
> > void kmem_cache_free_bulk(struct kmem_cache *s, size_t size, void **p)
> > {
> > - __kmem_cache_free_bulk(s, size, p);
> > + struct kmem_cache_cpu *c;
> > + struct page *page;
> > + int i;
> > +
> > + local_irq_disable();
> > + c = this_cpu_ptr(s->cpu_slab);
> > +
> > + for (i = 0; i < size; i++) {
> > + void *object = p[i];
> > +
> > + if (unlikely(!object))
> > + continue; // HOW ABOUT BUG_ON()???
> > +
> > + page = virt_to_head_page(object);
> > + BUG_ON(s != page->slab_cache); /* Check if valid slab page */
>
> You need to use cache_from_objt() to support kmemcg accounting.
> And, slab_free_hook() should be called before free.
Okay, but Christoph choose to not support kmem_cache_debug() in patch2/7.
Should we/I try to add kmem cache debugging support?
If adding these, then I would also need to add those on alloc path...
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Sr. Network Kernel Developer at Red Hat
Author of http://www.iptv-analyzer.org
LinkedIn: http://www.linkedin.com/in/brouer
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